From the above table the ratio of Hydro to thermal mix in Karnataka is 29:71 as against 40:60 as per assessment of CEA. 2.1.7 Requirement VS availability during Feb 2016 (Demand in MW) in
Source: Progress report for FEB-2016 published by SRPC, CEA
2.1.9 Load shedding in MU in Karnataka is for the month of February 2016 is
as follows:
STATE KARNATAKA
LOAD SHEDDING [MU]
211.55
Source: Progress report for Feb - 2016 published by SRPC, CEA
The 18th electric power survey also indicates that the all India
compounded annual growth rate for the peak power demand works out
to 9.58% during 2009-10 to 2016-17 & 7.27% and during 2016-17 to
2021-22. The growth rate for energy would be 8.55% during 2009-10 to
2016-17 & 7.05% and during 2016-17 to 2021-22. Further the electrical
energy requirement would increase to about 1904861MU by 2021-22
and the peak demand would reach to about 283470MW.
2.1.11 Justification for the project:
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As indicated above, bulk of the power generation should come from
thermal and hydro power plants. In order to build up a reliable, stable
and effective power generation system, the integrated operation of both
thermal and hydro power stations is considered necessary, with thermal
stations operating as base load and hydro stations meeting the
supplemental and peak power requirements.
From the above tables, it could be seen that peak demand and energy
requirements could not be met even after 11th Plan leading to power
cuts in the state and affecting Industries and general public. In order to
overcome the deficit and supplement the grid, run of the river scheme
proposed could be considered for implementation.
Summary
- Need for total approx. 89500MW of generation in the 12th plan in
India and about 8826MW in Karnataka.
- Power supply position during 2007-08, 2008-09, 2009-10 and 2010-
11 of 11th plan shows peak deficit ranging from 10 to 17% and
energy deficits ranging from 8 to 11%.
- Run of the river plants are preferred due to renewable feature and
low submergence and environmentally friendly.
- After 2014, there is a total change in the planning for large addition
of capacity mainly in renewable energy sector. But, Power from
renewable energy sector is fluctuating due to its seasonality.
Whereas, hydro power is considered to be most reliable source of
power.
- Even with around 4500MW & 7000MW of capacity addition from
Wind & Solar Power by 2017 & 2022 (As per studies by NIAS) the
peak deficit continues to prevail. Hydro plants are preferable to
operate during peak hours since start up time for hydro plants is very
less.
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CHAPTER III
BASIN DEVELOPMENT
3.1 The Course of the river
3.1.1 Cauvery River is one of the important east flowing rivers of
Karnataka. It has its origin near Talakaveri in Kodagu District at an
elevation of 1341m in Brahmagiri Range of hills in the Western
Ghats. The river flows through Kodagu, Mysore and Mandya districts
of Karnataka State and enters Tamilnadu State near Hogenakal and
thereafter flows through the plains of Tamilnadu and joins the Bay of
Bengal. The important tributaries of Cauvery River in Karnataka are
Hemavathy, Harangi, Shimsha and Arkavathi.
3.1.2 The Cauvery lies between East longitudes 750 30’ and 790 45’ and
North latitudes 100 05’ and 130 30’. It is the third largest perennial
river flowing in Southern India. The Cauvery basin is bounded by
Tungabhadra sub-basin of Krishna basin on the Northern side and
Palar basin on the Southern side.The Nilgiris, an offshoot of Western
Ghats, extend Eastwards to the Eastern Ghats and divide the basin
into two natural and political regions i.e, Karnataka plateau in the
North and Tamilnadu plateau in the South.
3.1.3 The total catchment area of the entire Cauvery basin is 81,155
sq.km and the total yield is of the order of 22,375 Mcum. Out of the
total catchment of 81,155 sq.kms, 34,273 sq.kms lies in Karnataka,
43868 sq.kms in Tamilnadu, 2866 sq.kms in Kerala and 148 sq.km
in Pondicherry. The total catchment area of the river up to the
Shivasamudram falls is 21,715 sq.km. The independent catchment
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area up to Shivasamudram falls (Below KRS and Kabini Dams) is
8955 sq.kms.
3.1.4 Basin Description
The River Cauvery originates at Talakaveri in Coorg District of
Karnataka in Brahmagiri Range of hills in the Western ghats at an
elevation of 1341 m. (above MSL) and drains a total area of 81,155
Sq.Kms. of which 34,273 Sq.Kms lies in Karnataka, 43856 Sq.kms.
in Tamilnadu, 2866 Sq.Kms in Kerala and 160 Sq.Kms in Union
Territory of Pondicherry. The Cauvery basin is bounded by
Tungabhadra sub-basin of Krishna basin on the Northern side and
Palar basin on the Southern side. The Western ghats form the
Western boundary. The Nilgiris, an offshore of Western ghats,
extend Eastwards to the Eastern boundary. The Nilgiris, an offshore
of Western ghats, extend Eastwards to the Eastern ghats and divide
the basin into two natural and political regions i.e., Karnataka plateau
in the North and the Tamilnadu plateau in the South. In Tamilnadu,
the Eastern part of the basin in the elevation range of 0 to 150 m
sloping gently up from the sea.
3.1.5 At Shivasamudram, the river branches off into two parts and falls
through a height of 91 m. in a series of falls and rapids. The falls at
this point is utilized for power generation. The power station at
Shivasamudram was built as early as 1902. The two branches of
the river join after the fall and flow through a wide gorge which is
known as “Mekedatu” (Goats leap) and continues its journey to from
the boundary between Karnataka and Tamilnadu States for a
distance of 64 Kms. At Hogennekkal Falls, it takes southernly
direction and enters the Mettur reservoir which was constructed in
1934. A tributary called Bhavani joins Cauvery on the Right bank
about 45 Kms. Below Mettur reservoir. Thereafter it takes Easterly
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course to enter the plains to Tamilnadu. Two more tributaries Noyil
and Amaravathi join the river. The river then widens with sandy bed
and flows as “Akhanda Cauvery”.
3.1.6 Immediately after crossing Tiruchirapalli district, the river divides into
two parts, the Northern branch being called “ The Coleron” and
Southern branch remains as Cauvery and from here the Cauvery
Delta begins. After flowing for about 16 Kms. The two branches join
again to from ‘Srirangam island”. On the Cauvery branch lies the
“Grand Anicut” said to have been constructed by a Chola King in 1st
Century A.D. Below the Grand Anicut, the Cauvery branch splits into
two, Cauvery and Vennar. These branches divide and sub-divide
into small branches and form a network all over the delta.
3.1.7 The total length of the river from the origin to its outfall into the sea is
800 Kms. of which 320 Kms. is in Karnataka, 416 kmt. In Tamilnadu
and 64 Kms. Forms the common border between the Karnataka ana
Tamilnadu states. The Cauvery basin is fan shaped in Karnataka
and leaf shaped in Tamilnadu. The runoff does not drain off quickly
because of its shape and therefore no fast raising floods occur in the
basin. The basin receives rainfall mainly from the S-W Monsoon and
partially from N-E Monsoon in the Karnataka. The basin in
Tamilnadu receives good flows from the North – East Monsoon.
The river system:
3.1.9 The Cauvery river system consists of 21 principal tributaries each
with Catchment Area exceeding 250 Sq.kms. The largest of all of
them of Catchment Area are Shimsha, lying wholly in Karnataka, the
Amaravathi rising in Kerala but lying mostly in Tamilnadu and the
Kabini rising in both Kerala and Tamilnadu but laying mostly in
Karnataka. The Bhavani is the fourth largest and the second longest.
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It rises in Kerala and Karnataka but lies mostly in Tamilnadu. The
longest tributary, the Hemavathi (245 Kms.) is the fifth largest in
Catchment area and lies wholly in Karnataka.
3.1.10 From the point of view of flow contribution to the system, apart from
the head reach of the Cauvery main, the most important tributaries
are
i) the Hemavathi,
ii) the Kabini and
iii) the Bhavani
3.2 Power Potential of the river basin and stages of development
3.2.1 The first power plant in India was established in Cauvery basin at
Shivanasamudra during 1902 and is one of the first in Asia. The
installed capacity as of 2015 is 42.0 MW (4 units of 6MW each and 6
units of 3 MW each). The other state owned power house is at Shimsha
with an installed capacity of 17.2 MW (two units of 8.6 MW each).
3.2.2 Apart from the above two state owned power houses, there are number
of small and mini hydro power stations operated by independent power
producers (IPP’s) at irrigation dam toes, canal drops and irrigation
Anicuts. There are about 9 Mini hydro power projects operating in and
around the proposed Shivasamudram project with a total installed
capacity of around 64 MW.
3.2.3 Apart from Shivasamudram, three major power projects have been
proposed on Cauvery basin between Shivasamudram in Karnataka and
Mettur Dam in Tamilnadu. The Shivasamudram & Mekedatu projects lie
entirely in Karnataka state. Rasimanal and Hogenakal projects lie in the
common border of the two states with more submersions in Karnataka.
3.2.4 The location and proposed potentials from all these proposed power
projects is as below.
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Power Projects in Cauvery Basin
I. Projects within Karnataka Boundary
Name FRL
EL (m) TWL
EL (m) Submersio
n (Ha)
Storage
TMC
IC MW
Energy MU
Shivasamudram (Phase I )
614.15 440.00River
Course 0.10 200 815.09
Mekedatu 440.00 305.00 5445 43.00 360 524
Power Projects in Cauvery Basin
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Power Projects in Cauvery Basin
II. Projects on common Boundary (As per NHPC Proposals)
Name FRL
EL (m) TWL
EL (m) Submersio
n (Ha)
Storage
TMC
IC MW
Energy MU
Rasimanal 305.0 255.0 2580 15.25 200 563.0
Hogenakal 255.0 230.1 292 0.37 120 330.1
3.2.5 The location of the proposed projects are marked on topo sheet and
enclosed in drawing volume (volume IV) of the report.
3.3 Whether trans-basin diversion of waters involved
3.3.1 No trans-basin diversion of water is involved in any of the proposed
power projects in the Cauvery basin.
3.4 Fitment of the scheme in the overall basin development
3.4.1 The proposed Shivasamudram Run of the River Power Project does
not interfere with any of the existing or proposed projects. It is purely
a run of the river project with no storage. This project utilizes only the
flows to be ensured to downstream and also the excess flows, if any.
It will not in any way affect the flows due to downstream.
3.5 Fitment of the scheme in the power potential assessment
studies carried out by CEA
3.5.1 The Shivasamudram scheme had earlier been proposed to be
included in the 12th five year plan with an installed capacity of 270
MW. After detailed studies the power potential is now revised to 200
MW in Phase I and 100 MW in Phase II.
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3.6 Effect of future upstream / downstream developments on the
potential of proposed scheme.
3.6.1 There are no major proposed projects on the upstream of the
proposed Shivasamudram scheme. Any other small irrigation /
power project will have no effect on the proposed Shivasamudram
scheme. Also the releases of water to Tamilnadu as per the Tribunal
award have to pass through Shivasamudram which will ensure water
availability to the scheme.
3.6.2 The Mekedatu scheme is proposed on the downstream of
Shivasamudram with a proposed FRL of EL 440 m and a storage
capacity of around 54 TMC. With the implementation of this project
the existing Shimsha power house gets submerged.
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CHAPTER IV
INTER-STATE ASPECTS
4.1 State / Countries traversed by the river
4.1.1 Cauvery River is one of the important east flowing rivers of
Karnataka. It has its origin near Talakaveri in Kodagu District at an
elevation of 1341m in Brahmagiri Range of hills in the Western
Ghats. The river flows through Kodagu, Mysore and Mandya districts
of Karnataka State and enters Tamilnadu State near Hogenakal and
thereafter flows through the plains of Tamilnadu and joins the Bay of
Bengal. The important tributaries of Cauvery River in Karnataka are
Hemavathy, Harangi, Kabini, Shimsha and Arkavathi.
4.1.2 The Cauvery lies between East longitudes 750 30’ and 790 45’ and
North latitudes 100 05’ and 130 30’. It is the third largest perennial
river flowing in Southern India. The Cauvery basin is bounded by
Tungabhadra (sub-basin of Krishna basin) on the Northern side and
Palar basin on the Southern side. The Nilgiris, an offshoot of
Western Ghats, extend Eastwards to the Eastern Ghats and divide
the basin into two natural and political regions i.e, Karnataka plateau
in the North and Tamilnadu plateau in the South.
4.2 Distribution of catchment in states and yields from the catchment of country concerned
4.2.1 The total catchment area of the entire Cauvery basin is 81,155
sq.km. Out of this, 34,273 sq.kms lies in Karnataka, 43868 sq.kms in
Tamilnadu, 2866 sq.kms in Kerala and 148 sq.km in union Territory
of Pondicherry. The total catchment area of the river up to the
Shivasamudram falls is 21,715 sq.km. The independent catchment
area below KRS and Kabini Dams upto SRRP is 8955 sq.kms.
The maximum length of the river from the origin to its outfall into the
Sea is 802 kms. Of which 381 kms. Is in Karnataka, 357 kms. In
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Tamilnadu and 64 km in common boundary. The Cauvery basin is
fan shaped in Karnataka and leaf shaped in Tamilnadu.
4.2.2 The total yield of Cauvery basin assessed by Cauvery Water
Disputes Tribunal (CWDT) is 740 TMC at 50% dependability.
4.3 Inter-state sharing of water 4.3.1 The inter-state river Cauvery and its valley encompass the States of
Karnataka, Kerala, Tamil Nadu and the Union Territory of
Pondicherry. Due to the topographical features, historically the
irrigation in the Cauvery basin developed in the low lying areas and
delta region at the mouth of the river then lying in the Madras
Presidency. However, with the growth of high-dam technology in the
later part of 19th century, the utilization of water in the upland
regions then lying in Mysore was taken up for consideration. Hence,
conflict or dispute erupted between the old users represented by
Madras and new users represented--by Mysore. These disputes
were attempted to be addressed by the British Paramount by the
imposition of the unjust and one-sided Agreements of 1892 and
1924 on the Princely State of Mysore. This resulted in further
widening of the gap in irrigation development in the two States.
Madras developed further on its advantages and on the other hand
prevented Mysore even the minimum developments bestowed under
the unjust agreements.
4.3.2 Post-Independence: After independence, the princely State of Mysore merged into Union
of India and then in 1956, a new reorganized State of Mysore now
called Karnataka emerged. The new State, by about early sixties
started planning construction of various irrigation projects viz.,
Hemavathy, Harangi, Kabini in the Cauvery basin, but Tamil Nadu
protested against the said new projects. The Government of India
failed to give clearance to Karnataka Projects due to the objections
of Tamil Nadu. Between 1960 to 1990, both the States of Karnataka
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and Tamil Nadu were engaged in negotiations under the aegis of the
Central Government to resolve the disputes arising from the
construction of new projects-in-Karnataka and for obtaining the
Clearance to the said projects. The State of Kerala also joined the
issue by proposing to construct several irrigation and power projects
in the Kabini, Bhavani and Amaravathy sub-basins of Cauvery
basin. In this background, the farmers of Tamil Nadu approached
the Supreme Court through a writ petition in November 1983 to
resolve the matter. The Supreme Court in its judgment of May 1990
directed the Government of India to constitute a Tribunal under the
provisions of the Inter-State Water Disputes Act, 1956. Accordingly,
the Cauvery Water Disputes Tribunal (CWDT) was established on
2nd June 1990.
4.3.3 Before the Tribunal, the claim of water by the States of Karnataka,
Kerala, Tamil Nadu Union Territory of Pondicherry are 465 TMC,
99.8 TMC, 573.5 TMC and 9.35 TMC respectively, totaling to about,
1,150 TMC. This demand is very much more than the estimated
yield of the river, which is in the range of 740 to 800 TMC.
4.3.4 Based on the pleadings of the States before it, the Tribunal in
January 1992 framed 50 issues. After the completion of evidence by
all the three States in December2001, the Tribunal classified the 50
issues into three distinct groups(validity and continuance of
agreements, available quantum of water, and equitable allocation) to
enable the States to present their arguments.
. Even before the completion of the Pleadings - on the application of
Tamil Nadu and Pondicherry - the Cauvery Water Disputes Tribunal
passed an interim order on 25.06.1991, directing Karnataka to
"ensure" 205 tmc at Mettur reservoir in Tamil Nadu on a monthly and
weekly schedule, apart from restraining Karnataka from extending
irrigation beyond the then existing 11.2 lakh acres. Subsequently, on
03.04.1992 and 19.12.1995 Tribunal further clarified its earlier order.
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4.3.5 The Interim Order is to "remain operative till the final adjudication of
the dispute referred to the Tribunal".
4.3.6 The Cauvery River Authority (CRA) was constituted in August 1998
with the Hon'ble Prime Minister as the Chairman and with the'
Hon'ble Chief Ministers of the four States as its Members in order to
give effect to the interim-order· of -the -Tribunal-and-its subsequent
orders on the directions of the Supreme Court in OS No 1 of 1992
filed by Tamil Nadu. The Authority has a Monitoring Committee to
assist in its functioning.
4.3.7 Main dispute: Arguments on all the three Groups of issues relating to the main
dispute commenced before the Tribunal in January 2002 and
completed on 21.04.2006. Thus the Sec 5(2) proceeding before the
Tribunal was spread over 16 years and 8 months.
4.3.8 After the completion of arguments on 21.04.2006, on the basis of
majority orders, Assessors' Reports were made available to the party
States on 10.5.2006. Comments and cross-comments were filed by
the States on the Assessors' Reports.
FINAL ORDERS OF THE TRIBUNAL DATED 05.02.2007
4.3.9 On 5th February 2007, the Hon'ble Tribunal gave its Report with the
final decision under Section 5(2) of ISWD Act 1956. The relevant
clauses of the Report and final decision are:
“ Clause-IV
The Tribunal hereby determines that the utilizable quantum of waters
of the Cauvery at Lower Coleroon Anicut site on the basis of 50%
dependability to be 740 thousand million cubic feet – TMC (20,954
M.cu.m).”
“ Clause-V : The Tribunal hereby orders that the waters of the river Cauvery be
allocated in three States of Kerala, Karnataka and Tamil Nadu and
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U.T. of Pondicherry for their beneficial uses as mentioned hereunder
:-
(i) The State of Kerala - 30 TMC
(ii) The State of Karnataka - 270 TMC
(iii) The State of Tamil Nadu - 419 TMC
(iv) U.T. of Pondicherry - 7 TMC .
Total: - 726 TMC In addition, we reserve some quantity of water for (i)
environmental protection and (ii) inevitable escapages into the sea
as under:-
(i) Quantity reserved for environmental - 10 tmc Protection
(ii) Quantity determined for inevitable escapages into the sea - 4 TMC .
14 TMC
Total (726+14)- 740 TMC ”
“ Clause-IX :
Since the major shareholders in the Cauvery waters are the States
of Karnataka and Tamil Nadu, we order the tentative monthly
deliveries during a normal year to be made available by the State of
Karnataka at the inter-state contact point presently identified as
Billigundulu gauge and discharge station located on common border
as under :-
Month TMC Month TMC
June 10 December 8
July 34 January 3
August 50 February 2.5
September 40 March 2.5
October 22 April 2.5
November 15 May 2.5
192 TMC
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The above quantum of 192 TMC of water comprises of 182 TMC
from the allocated share of Tamil Nadu and 10 TMC of water
allocated for environmental purposes.
The above monthly releases shall be broken in 10 daily intervals by
the Regulatory Authority.
The Authority shall properly monitor the working of monthly schedule
with the help of the concerned States and Central Water
Commission for a period of five years if any modification/adjustment
is needed in the schedule thereafter, it may be worked out in
consultation with the party States and help of Central Water
Commission for future adoption without changing the annual
allocation amongst the parties. ”
“ Clause-XIII:
The States of Karnataka and Tamil Nadu brought to our notice that
a few hydro-power projects in the common reach boundary are being
negotiated with the National Hydro-Power Corporation (NHPC). In
this connection, we have only to observe that whenever any such
hydro-power project is constructed and Cauvery waters are stored in
the reservoir, the pattern of downstream releases should be
consistent with our order so that the irrigation requirements are not
jeopardized.”
“ Clause XVIII :
Nothing in the order of this Tribunal shall impair the right or power or
authority of any state to regulate within its boundaries the use of
water, or to enjoy the benefit of waters within that State in a manner
not inconsistent with the order of this Tribunal.”
“Clause XIX:
In this order,
(a) “Normal year´shall mean a year in which the total yield of the
Cauvery basin is 740 TMC.
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(b) Use of the water of the river Cauvery by any person or entity of
any nature whatsoever, within the territories of a State shall be
reckoned as use by that State.
(c) The expression “water year” shall mean the year commencing on
1st June and ending on 31st May.
(d) The “irrigation season” shall mean the season commencing on
1st June and ending 31st January of the next year.
(e) The expression “Cauvery river” includes the main stream of the
Cauvery river, all its tributaries and all other streams contributing
water directly or indirectly to the Cauvery river.
(f) The expression “TMC” means thousand million cubic feet of
water.”
4.4 Existing riparian use
4.4.1 At present there are around 27 existing and ongoing irrigation projects.
The tribunal has considered 18.85 lakh acres while allocating 270 TMC
of water to Karnataka. This has been contested by Karnataka in
Supreme Court. The total gross storage from all the existing and
ongoing projects is of the order of 140 TMC.
4.4.2 As per the Cauvery Tribunal order the quantity of water to be ensured
by Karnataka at the interstate contact point i.e., CWC gauge site at
Beligundlu in a normal year is 192 TMC.
4.5 Pending Interstate Disputes not an impediment:
4.5.1 The water disputes relating to the sharing of the waters of Cauvery were
referred for adjudication to the Cauvery Water Disputes Tribunal
(Tribunal) constituted by the Central Government vide Notification dated
2nd June 1990 issued under the provisions of Inter-State Water Disputes
Act 1956 (Act of 1956). The Tribunal passed its final report and
decision on 5.2.2007. The party States of Karnataka, Tamil Nadu and
Kerala have filed Civil Appeals before the Supreme Court challenging
the said final report and decision. Besides, the party States and Union
of India have also filed application for explanation or guidance before
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the Tribunal under Sec.5(3) of the Act of 1956. These Civil Appeals and
applications are pending consideration. However, no interim orders are
passed in these pending proceedings. Therefore, it emerges that the
interstate water dispute is not fully resolved in view of the pending Civil
Appeals before the Hon’ble Supreme Court. However, without prejudice
to the contention of Karnataka in the Civil Appeals, a flexible project on
the run off the river has been now conceived which can be tailored to
any pattern of flows which the Honb’le Supreme Court may finally
decide. Pending interstate dispute, in these circumstances, is not an
impediment. In this background, as already stated, the Union Ministry
of Power had convened interstate meeting on 8.7.2009 to discuss hydro
power project. During the meeting, as submitted above, the State of
Karnataka highlighted the power potential available at Shivasamudram
and expressed its intention to take up the project. The Secretary of
Power, Government of India supporting the stand of Karnataka said that
the State of Tamil Nadu should not have any objections for such project
provided the State of Karnataka agrees to the joint mechanism for
monitoring the water to Tamil Nadu.
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CHAPTER V
SURVEY AND INVESTIGATIONS
5.1 Topographical survey
5.1.1 The location of the diversion weir, intake, the power house area,
alignment of tail race tunnel, location of tailrace weir, surface power
house, location of ODY, sites for dumping yards, labour camp, store
yard etc. were first located on the 1:50000 survey of India Topo
sheet. The selected locations were located on the ground by
reconnaissance. The land details and suitability of the land selected
for various purposes were studied and finalized.
5.1.2 Detailed surveys like block level plan at the proposed weir site,
power house site, intake etc. carried out with Total Station
instrument. The bench mark was carried from the GTS bench mark
established at the site through Survey of India.
5.1.3 Detailed surveys were also carried out for the alignments of pressure
shaft, tailrace tunnel, portal at adit, adit alignment, approach tunnel
to power house, etc.
5.1.4 The levels are also carried to establish the FRL/crest level of the
existing Shiva Anicut on the right limb of the Cauvery river. The FRL
of the proposed weir on the right limb of Cauvery river for diverting
water to the proposed power house is matched with the crest level of
Shiva Anicut so that a common reservoir is formed at
Shivasamudram with the existing Anicut on the left limb and the
proposed weir on the right limb.
5.1.5 Detailed contour survey for FRL and MWL for computing the water
spread area and to estimate the land to be acquired for the project
which are coming under the reservoir area are also carried out. The
land requirement is also marked on the ground.
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5.1.6 Approach roads are existing to power house area tailrace exit of
Shivasamudram and portals of adit and approach tunnel to power
house. Surveys have been carried out and the alignments to the
additional roads to be formed have been finalized.
The detailed survey map carried out is enclosed vide drawing No.
SRRP/Civil/05.
5.2 Archeological survey in the reservoir area
5.2.1 The reservoir area is mostly confined to the river course. An earthen
bund is proposed all along the left bank of the right limb of Cauvery
river to protect the irrigated land in the island formed by the river. No
monuments of Archeological importance are found in the reservoir
area. Clearance has been obtained from the Department of
Archeology for the proposed project.
5.3 Mineral surveys in the catchment areas
5.3.1 No minerals commercially viable are found in the vicinity of the
project site
5.4 Right of way surveys for the reservoir
5.4.1 The reservoir formed by the construction of the proposed weir is
confined to the river course. The reservoir is not going to submerge
any approaches or bridges.
5.5 Communication surveys
5.5.1 The project site is approachable by existing roads. Roads of small
stretches are to be formed to reach some of the components like
weir, approach tunnels etc. Detailed surveys have been conducted
for forming the roads.
5.6 Geology and Geo-Technical features
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5.6.1 The area falling in the Cauvery basin mainly comprises of igneous
and Metamorphic rocks of Pre cambrain age, either exposed or
covered by this mantle of residual and transported soils. The main
component rock types are Dharwar Seluists, Granites and granitic
gneissess and charmokites. The Manjrabad area of Hassan district
in Karnataka rests on the border of Western ghats and comprises
some of the most beautiful scenery in the Karnataka State. The hills
forming the western limits of the district extend from the past at the “
bisley Ghat ” to the “ Jenkle Betta’’ and includes peaks like “
Pushpagiri ’’ or “ Subramanya ” close to the South West border rising
to a height of 1715m. Besides Jenkle betta at 1389 m, Devara Betta
rises to a height of 1282 m and Murukanagudda at 1300 m. Also n
Indra betta in Hassan district is 1020 m high and is noted for 52 feet
colossal statue of “ Gommateshwara ’’on its summit. The Melkote
range forms a series of conspicuous hills marked by trignometrical
status (Melukota peak) and these composed of pink to light grey
granite gneisses. Introding all the rocks are several felsite and
porphyry dykes. The porphyry dykes are situate in the
neighbourhood of Mysore city. The delta area in Tamilnadu is
under-lain by formation of Quarternery. Tertiary and Cretaceous
age. In the western parts of the basin there are igneous and
metamorphic rocks of Archalan age.
5.6.2 The Geology at the project components of the proposed
Shivasamudram project are covered in the Geological report of the
project.
5.7 Seismicity
5.7.1 The project now comes under Chamarajanagara district of
Karnataka State. As per the Seismo-tectonic map of India IS 1893-
2002, the Shivasamudram project is placed in Zone-II of the zoning
gradation.
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5.8 Foundation investigations of components
5.8.1 The details of foundation investigations carried out for various
components of the project are covered in the Geological report of the
project.
5.9 Construction material investigations
5.9.1 Detailed investigations have been carried out for stone quarry, sand
quarry and soil borrow areas. The details are covered in the
Geological report of the project.
5.10 Hydrological and Meteorological investigations
5.10.1 Rainfall:
The basin is under the influence of both the South-West (June to
September) and North-East (October to December) monsoons. The
basin in Karnataka receives rainfall mainly from South-West
monsoon and partially from North-East monsoon. The basin in
Tamilnadu receives rainfall from mainly from North-East monsoon.
There are number of rain gauge stations in the Cauvery basin. The
estimated average annual rainfall in this river basin in Karnataka is
between 600 mm and 800 mm. The rainfall near its origin, ie. In
Kodagu District of Karnataka is of the order of 6000 mm. In
Tamilnadu, the average rainfall is low ranging from 500 mm to 1000
mm. A catchment map showing the Isohyets over the basin is
enclosed in the Annexures volume II of the report.
5.10.2 Climate:
There are four distinct seasons in Cauvery basin. They are i) Cold
Weather, ii) Hot Weather, iii) South-West. monsoon, iv) North-East
monsoon.
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In cold season, the Western Ghat is cooler than the rest of the basin
and climate is generally pleasant. In the Hot Weather season, the
Central, Northen and Eastern regions are hotter than the Western
most parts. The South-West monsoon sets by middle of June and
ends by middle of September. During this season the basin receives
major rainfall. The North-East monsoon is from October to
December and is important particularly to Eastern part of Tamilnadu.
5.10.3 Temperature:
The basin has tropical climate. In the upper reaches and the
variation of temperature is very small. The mean temperature in
Kerala portion of the basin is 200 C and in Karnataka it ranges from
200 C to 260 C. The mean temperature in Tamilnadu varies from 260
C to 300 C.
5.10.4 Evaporation:
As per the evaporation data observed by India Meteorological
Department and Government of Karnataka, the mean annual
evaporation is of the order of 150 cm to 260 cm in Karnataka part of
the basin and is about 250 cm in Tamilnadu part of the basin. The
mean daily evaporation varies from 4 mm to 6 mm increasing from
East to West during January. The mean daily evaporation increasing
from N.W. to S.E. being 8 mm to 9 mm in July and 5 mm to 6 mm in
October. The mean annual evaporation depth is about 250 cm.
5.10.5 Water Quality:
Water quality at different locations of Cauvery river is studied by
C.W.C. From the studies it is seen that the river water is generally fit
for drinking purpose without conventional treatment BUT AFTER
DISINFECTION. The water is considered safe for drinking, culinary
and food processing purposes which comes into ‘A’ class category.
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The qualifying parameters are generally found within the tolerance
limits for drinking. The water is found alkaline in nature. The total
hardness at all the sampling points represent fitness for washing and
drinking purposes.
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CHAPTER VI
HYDROLOGY
6.1 Hydrological inputs for the project planning
6.1.1 The river Cauvery is famous for its traditional sanctity, its picturesque
scenery and its utility for irrigation. It is the third largest Perennial
river flowing in southern India.
6.1.2 The drainage area of river Cauvery in Karnataka state is 34,273
Sq,Kms which is 42.23% of the total drainage area.
6.1.3 The total length of the river Cauvery which raises at an elevation of
1235 M above M.S.L. in Kodagu district is 800 Kms before it falls in
to Bay of Bengal. Out of this 320 Kms. Course is in Karnataka.
6.1.4 The East flowing river has 21 Major and Minor tributaries, and in
Karnataka the major tributaries are as follows:
Name of river Bank Length in Kms Catchment
area in
Sq.Kms
Joining before
SRRP
Harangi Left 50 717
Hemavathi Left 245 5410
Lakshmanathirtha Right 131 1690
Kabini Right 230 7040
Joining after
SRRP
Shimsha Left 221 8469
Arkavathi left 161 4150
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6.1.5 A map showing the entire Cauvery basin, its sub basins and the
location of the existing projects in Karnataka are enclosed as
drawing in volume IV of the report. The details of major irrigation
projects in Karnataka in the Cauvery basin are as follows:
1) Krishna Raja Sagara Project
This is the first major irrigation project constructed across cauvery
river in Karnataka near Mysore. The project was commenced
during the year 1911 and completed during the year 1931. The
full reservoir level is 124.80 m with a gross storage capacity of
49.452 TMC. The catchment area up to the dam site is 10619 sq.
km and the design yield was 189 TMC at 50% dependability.
2) Harangi Reservoir Project:
This is an irrigation project constructed across river Harangi, at
village Hudgur, Somwarpet Tq , Coorg district. The total
catchment at the dam site is 419.58 Sq. Kms. The design yield at
50% dependability is 39.30 Tmc. The storage capacity of the dam
is 8.50 tmc. The Full Reservior Level is EL 2859.00 ft. (871.39 m).
3) Hemavathi Reservior Project:
An irrigation project constructed across river Hemavathi at village
Gorur, Tq. Hassan, District-Hassan. The catchment area at dam
site is 2810 Sq.Kms. The design yield at 50% dependability is
78.687 Tmc. The storage capacity of the dam is 37.103 tmc. The
Full Reservior Level is EL 2922.00 ft. (890.58 m).
4) Kabini Irrigation project:
This is also an irrigation project across river Kabini at village
Bidara Halli-Beechanahalli, Tq. H.D.Kote, District-Mysore. The
catchment area at dam site is 2141.9 Sq.Kms. The design yield at
50% dependability is 97.70 TMC. The storage capacity of the
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dam is 552.70 M cum. The Full Reservior Level is EL 2284.00 ft.
(696.16 m)
5) Nugu Irrigation project :
Irrigation project across river Nugu at village Beerwal, Tq.
H.D.Kote, District-Mysore. The catchment area at dam site is 984
Sq.Kms. The design yield at 50% dependability is 10 TMC. The
storage capacity of the dam is 5.44 TMC. The Full Reservior
Level is EL 2380.00 ft. (725.388 m).
6.1.6 The Central Water Commission is conducting Hydrological
observations at 31 stations spread over the entire basin including
Cauvery Delta in Karaikal region and daily discharge data collected
at all these sites are published annually in the form of Water Year
Book/Discharge Data Book.
6.1.7 The Cauvery river has been gauged at Kollegala on the upstream of
the proposed Shivasamudram project and at Beligundlu in the
Karnataka – Tamilnadu border by Central Water Commission. The
daily discharge data at these two stations has been collected from
Central water collection for the period from 1971-72 to 2006-07.
6.1.8 The average annual flows at Kollegal site for the 42 years data
considered (1971-72 to 2012-13) is 6555.70 M cum(231.51 TMC).
The maximum and minimum observed annual flows are 11595.06 M
cum(409.48 TMC) and 2154.73 M cum (71.76 TMC) respectively.
6.1.9 The daily discharges and monthly & annual abstracts of flows at
Kollegal gauge station collected are enclosed as Annexure in volume
II of the report.
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6.2 Effect of project development on hydrologic regime
6.2.1 The proposed Shivasamudram project is a run of the river scheme.
The contemplated storage is just 0.73 M cum and there is no
consumptive use of water. Hence implementation of this project will
not alter/affect the hydrologic regime. As already stated in para
3.4.1, this project utilizes only the flows to be ensured to downstream
and also the excess flows, if any. It will not in any way affect the
flows due to downstream.
6.3 Hydrological studies
6.3.1 Since the Kollegala gauge station is just upstream of the proposed
Shivasamudram project, the discharge data at Kollegal station is
used for power potential studies for the project. The independent
catchment area between Kollegal gauge station and the proposed
Shivasamudram weir is only 633 sq.km and this catchment receives
around 700 mm rainfall per annum. The contribution of yield from
this independent catchment is negligible compared to the flow in the
river from the upstream catchment and hence is neglected.
6.3.2 From the daily flow data 10 day average flows are computed and
enclosed as Annexure in volume II of the report.
6.3.3 Design Flood- Estimation of Inflow Design Flood
Selection of Inflow Design Flood:
6.3.3.1 The design flood, also known as Inflow Design flood is the largest
flood that is selected for design or safety of the structure. In simplest
way design flood may be defined as the flood adopted for design
purpose.
6.3.3.2 IS 11223 classifies dams as large, intermediate and small based on
the storage capacity and hydraulic head. Dams having gross storage
less than 10 million cubic meter or hydraulic head less than 12 meter
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is classified as small dams and recommends 100 year Return Period
Flood to be adopted for designs.
6.3.3.4 The maximum height of the weir proposed for Shivasamudram
project is less than 10 m and the storage capacity is less than 5 M
cum. As per the above classification Shivasamudram weir comes
under the small dam category and 100 RPF can be adopted for
designs.
6.3.3.5 The same code also says that Flood of larger or smaller magnitude
may be used if the hazard involved in eventuality of failure is
particularly high or low. The relevant parameters to be considered in
judging the hazard in addition to the size would be:
a. distance to and location of the human habitations on the d/s after
considering the likely future developments and
b. maximum hydraulic capacity of the d/s channel at a level at which
catastrophic damage is not expected.
6.3.3.6 There is no hazard involved in eventuality of failure as there are no
habitation on the immediate downstream of the proposed weir and
the valley is capable of carrying the maximum floods. Hence floods
of lesser magnitude than the 100 year RPF can also be adopted for
design purpose.
6.3.3.7 CWC in their recommendations for Design Flood Estimation
procedures (Current Design Practices and issues Nov-1999)
recommends that dams should be classified in terms of
consequences of failure. As per the recommended classification of
dams, if the losses due to failure is minimal economic losses
typically limited to owners property with Virtually no potential for
future development of other land uses within the foreseeable future
and when the population at risk is less than 2000 is classified as Low
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consequence category and a return period flood of less than or equal
to 100 years is recommended.
6.3.3.8 IS 6966 recommends SPF or 100 year RP flood for designing free
board and 50-year RP flood for items other than free board for
design of weir and barrages and minor dams.
6.3.3.9 From the above recommendations a 50 to 100 year Return Period
flood can be adopted for designs for the proposed Shivasamudram
project. A 100 year return period storm is adopted for estimating the
design inflow flood for the project.
6.3.4 Derivation of Unit Hydrograph:
i) Clark’s approach
6.3.4.1 Clarks approach to unit hydrograph estimation is a scientific
approach for estimating the Design Inflow Flood as it takes into
account the time of concentration and other physical parameters of
the catchments.
T / Tc given by California formula = 1.0
Where T is the time of concentration to be adopted and
Tc is the value of time of concentration given by California formula
R / R + Tc = 0.45
Where R is the attenuation co-efficient and
Tc is the time of concentration
The Unit Hydrograph for the project is derived using the above
Clarks parameters. The detailed computations are appended as
Annexure in volume II of the report.
6.3.5 Determination of design storm :
6.3.5.1 The independent catchment area for the Shivasamudram weir site is
flat and receives annual average rainfall of around 1800 mm. The
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100 year return period one day storm recommended by CWC in their
report “Flood Estimation Report for Cauvery Basin” for the region is
180 mm. The same is adopted for the studies.
6.3.6 Time Distribution of Storm:
6.3.6.1 For the evaluation of the short period break up of 24 hour storm, the
rain fall percentages recommended by CWC for basins in Western
Ghats is adopted.
6.3.7 Estimation of Inflow Design Flood :
6.3.7.1 The short term computed storm is then convoluted with the Unit
Hydrograph ordinates to arrive at the Design Inflow Flood. An
infiltration loss of 1 mm per 30 minutes is applied for the design
condition.
6.3.7.2 The computed peak intensity of flood from the independent
catchment is 7144 cumecs using Clark’s unit hydrograph.
Considering the flood from upstream reservoirs a peak flood of
16990 Cumecs is adopted for the studies
6.3.7.3 The detailed computation of Inflow Flood is appended as Annexure in volume II of the report.
6.3.8 Design Inflow Flood for the project:
6.3.8.1 There are several irrigation dams on the upstream of
Shivasamudram project on the main Cauvery river and on its
tributaries. The main reservoirs and the number of gates and their
discharging capacities are listed below.
6.3.8.2 In case these gates are opened fully during heavy floods, the
discharge through the gates will reach the Shivasamudram site in
about 24 hours time. Though the intensity of flood reduces to some
extent due to the distance of travel, the routing studies have not
been done to non availability of flood hydrographs across these
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dams. The full discharging capacities from these reservoirs are as
below.
1) Krishnarajasagara Dam : 3,45,868 cusecs
2) Kabini Dam : 1,94,150 cusecs
3) Nugu Dam : 20,000 cusecs
If all the gates of the above reservoirs are opened, the combined
flood, added peak to peak would be 5,60,018 cusecs. The flood from
the independent catchment assessed is 2,52,288 Cusecs. The flood
from the upper reservoirs have to travel for about 36 hours before
reaching the Shivasamudram project area. Also the total flood from
the above reservoirs of 5,60,018 cusecs is the maximum discharging
capacity of the spillway added peak to peak. Considering all these
factors the design flood adopted for the project is 6,00,000 cusecs
(16990 Cumecs) same as the design flood adopted for Shiva anicut.
This is justifiable since a 50 year return flood is sufficient to be
adopted for the weir and in case of flood there will not be any
damage to any property. Also the maximum flood observed at
Kollegal gauge site which is just on the upstream side during the
period from 1972 to 2006 is of the order of 2,13,000 cusecs. A
statement showing the maximum and minimum discharge observed
at Kollegal gauge site is enclosed as Annexure in volume II of the
report.
6.3.9 Flood lift and Maximum water Levels:
6.3.9.1 The maximum inflow flood adopted for the studies is 16990 Cumecs
(6 lakh cusecs). The length of the over flow section of the proposed
Shivasamudram weir is 415 m. The overflow length available at the
existing Shiva anicut is 682.45 m. The flood lift over the crest level
works out to 4.0m.
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6.3.10 Fixing of top of weir and earthen bund:
6.3.10.1 The maximum length of water spread for the Shivasamudram
reservoir is 2.6 km. As per IS 6512 a wind speed of 118.8 Km/hour is
assumed for computing the fetch. The wave height works out to 1.0
m. A free board of 1.0 m above MWL is adopted for the concrete
weir and the top of weir is fixed at EL 620.5 m. A free board of 1.0 m
above MWL is adopted for the earthen bund and the top of the
earthen bund is fixed at EL 620.5 m. A parapet of height 1.15 m is
also proposed along the earthen bund.
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CHAPTER VII RESERVOIR
7.1 Catchment area, annual runoff, submergence etc.
7.1.1 The River Cauvery originates at Talakaveri in Coorg District of
Karnataka in Brahmagiri Range of hills in the Western ghats at an
elevation of 1341 m. (above MSL) and drains a total area of 81,155
Sq.Kms. of which 34,273 Sq.Kms lies in Karnataka, 43868 Sq.kms.
in tamilnadu, 2866 Sq.Kms in Kerala and 148 Sq.Kms in Union
Territory of Pondicherry.
7.1.2 The total catchment area of the basin up to Shivasamudram project
site is 21715 Sq.km. On the upstream of Shivasamudram is the KRS
dam, Kabini dam and Harangi are main dams built for irrigation
purpose. The independent catchment below these dams up to
Shivasamudram is 7010 Sq.km.
7.1.3 The Cauvery river is gauged by CWC at Kollegal gauge station at a
distance of 5 km on the upstream of the proposed project site. The
daily flow data has been collected from CWC for a period of 38 years
from 1971-72 to 2006-07. The daily data and the annual abstract are
enclosed as Annexure in volume II of the report. The average and
90% dependable annual discharge are 6691.20 M cum and 3835.89
M cum respectively.
7.2 Sedimentation data and studies:
The independent catchment area of Shivasamudram is 7010 sq.km.
There are large reservoirs on the upstream which checks the
sediment load to Shivasamudram reservoir. The Shiva Anicut on the
left limb of Cauvery river which is built during the year 1900 with
meager storage is not silted up.
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The silt data is being observed at Kollegal gauge site by CWC on the
upstream of Shivasamudram is collected and studied for the years
from 1993-94 to 2007-08. The abstract of monthly & annual silt load
observed is enclosed as Annexure in volume II of the report. The
average sediment load is only 29.84 Tonne / annum.
The average river bed level at the proposed weir site is EL 607 m.
The MDDL is fixed at EL 610.0m. The dead storage is 0.073 M cum.
Two river sluices of size 2m x 2.3m one on the left bank and another
on the right bank are provided to flush out the silt during heavy flows.
7.3 Fixation of storage and reservoir levels
7.3.1 At the proposed weir site there is no possibility of creating large
storage as the terrain is plain and any provision of storage
submerges large area of land. The FRL of the proposed
Shivasamudram weir is fixed at EL 615.40 m to match with the FRL
of existing Shiva anicut on the left limb of Cauvery river to form a
common reservoir. The MDDL is fixed at EL 610.0 m. The
submergence is confined to the river bank and the gross and live
storage for the proposed FRL are 2.766 M cum and 2.693 M cum
respectively. The live storage is just sufficient for full generation for
three hours. The top of the concrete weir is proposed at EL 620.5 m
and the top of the earthen bund is proposed at EL 620.5 m with a
solid parapet of 1.15 m on the reservoir side.
7.4 Life of Reservoir:
7.4.1 The capacity of the proposed reservoir is a very small. The weir is un
gated and the silt load is also less. Provision is made for silt flushing
during heavy flows through two river sluices. Also during floods the
water surpluses over the weir. The Shiva Anicut on the left limb of
the river is not silted and serving since the year 1900. Hence the
proposed weir will serve its purpose.
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7.5 Capacities at MWL, FRL, MDDL, Dead storage level etc.
7.5.1 The capacity of the reservoir at MWL, FRL and MDDL are 4.73M
cum, 2.766 M cum and 0.073 M cum respectively. The dead storage
level is at EL 610 m. As no silting of reservoir is anticipated the
capacities is not expected to change over the years.
7.6 Water tightness of the reservoir:
7.6.1 The Geological formation prevailing in the pickup weir site consists
of granite gneiss rock which is generally hard and fresh but jointed.
The joints are fairly tight and relatively impermeable. Hence, water
seepage through the joints is expected to be negligible.
7.7 Annual losses:
7.7.1 The water spread area of the reservoir at FRL is just 0.92 Sq.km.
The annual evaporation rate for the region is around 1.5 m. The
annual evaporation loss is around 4.5 M cum which is insignificant
compared to the inflow and utilizations. Also since the scheme is a
run of the river project, the evaporation loss during monsoon is much
less than 4.5 M cum. Hence evaporation losses are neglected in the
studies.
7.8 Flood absorption:
7.8.1 The reservoir capacity is very small for any flood absorption or
regulation. No gates are proposed for the weir. Flood gets
discharged to the downstream over the ogee profile of the weir.
7.9 Effect of sub soil water tables in the adjoining areas upstream
and downstream of the dam:
7.9.1 The reservoir formed by the proposed weir will be mainly confined to
the river course. On the downstream of the river the river bed is
sloping and at a distance of around 1 km there is a water fall. The
right bank of the reservoir is at a higher elevation and the terrain is
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barren. Any agricultural activity is above the FRL of Shivasamudram
reservoir. The area on the left bank of the reservoir is at a lower level
than the FRL and the lands are under cultivation. There is an
earthen bund all along the left bank of the river protecting these
lands from submersion during floods. In order to safeguard
submersion of these lands due to the construction of the weir, a
retaining wall all along the left bank and an earthen bund is also
proposed.
7.10 Seismic Characteristics and effect due to construction of dam
7.10.1 The project now comes under Chamarajanagara district of
Karnataka State. As per the Seismo-tectonic map of India IS 1893-
2002, the Shivasamudram project is placed in Zone-II of the zoning
gradation. The area is stable as far as seismic activities are
concerned. As the storage is confined to the river banks and the
quantity of storage is very small, there is negligible effect on seismic
characteristics.
7.11 Reservoir rim stability
7.11.1 As the proposed reservoir is confined to the river bank, detailed
studies for reservoir rim stability are not warranted.
7.12 Area of submergence:
7.12.1 The total area of submergence is due to the construction of the weir
is 90 Ha consisting of 65 Ha of river course and 15 Ha of forest and
private land.
7.13 Land acquisition:
7.13.1 The total land required for the project is 165 Ha. The area required
for the project components, roads, buildings, quarry area, soil borrow
area, dump yards, labor camp, site office, store and fabrication yard
etc. have been identified and marked on topo sheets and on field.
Out of the 165 Ha required for the project, 90 Ha of land comes in
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forest and the balance is in river course. The land will be acquired
and compensated as per the forest act and R & R rules.
7.14 Recreation facilities:
7.14.1 The reservoir created by the proposed construction of the weir will
be confined to the river course. Only recreational facility like boating
can be facilitated. The famous Indian game fish ‘Masheer’ can be
bred in the reservoir for fishing game.
7.15 Pisci-Culture:
7.15.1 The Cauvery river water is alkaline in character and free from
pollution but poor in nutrient status. The famous game fish of India –
Masheer –Tor Khudree are well represented in this part of the river
stretch. The reservoir formed by the proposed construction of the
weir offers a good breeding centre for the Masheer fish.
7.16 Other facilities if any:
7.16.1 There is no proposal for creating any other facilities near the project
site.
7.17 Need and recommendations for soil conservation measures in
the catchment:
7.17.1 Shivasamudram Run of the Power Scheme is a run of the river
scheme. Based on the topographic factors, soil type, climate,
landuse/vegetation cover in the catchment area various measures
boyh Engineering and Biological are proposed to be undertaken with
the aim to check soil erosion which in turn check siltation of the
reservoir. The Engineering measures will comprise construction of
number of check dams for gully control stabilization of flood prone
nallahs, landslides, river bank roads etc. The catchment area
treatment plan (CAT) pertains to preparation of a management plan
for treatment of erosion prone area of the catchments through
Biological and Engineering measures. A well designed CAT plan will
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be prepared as a part of EIA & EMP studies which will control the
sedimentation of the reservoir and also provide a life supporting
system to the local population through their active involvement.
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CHAPTER VIII
POWER POTENTIAL AND INSTALLED CAPACITY
8.1 Type of power plant
8.1.1 The proposed Shivasamudram power project is a run of the river
scheme across Cauvery river. The water required for power
generation is proposed to be diverted to the power house by
constructing a weir across the right limb of Cauvery river near
Shivasamudram. The height of the over flow section from the
average river bed level is 8.4 m. The average river bed level is EL
607 m. The FRL is proposed at EL 615.4 m and the MDDL at EL 610
m. The gross storage and live storage are 1.92 M cum and 0.73 M
cum respectively. The elevation – area and elevation – capacity
curves are enclosed as Annexure vide volume II. The Live storage is
sufficient to generate 300 MW (ultimate capacity) for about one hour.
8.2 Assessment of power potential
8.2.1 Existing projects near the proposed Shivasamudram scheme
The following are the existing projects coming under the vicinity of
SRRP:
1) Shiva anicut.
2) Shiva Power House.
3) Shimsha Power House.
4) Bangalore Water Supply Scheme.
8.2.2 Shiva Anicut:
Cauvery river bifurcate it to two limbs near Shivasamudram. On the
left limb is Gaganachukki falls and on the right limb is Barachukki
falls. A barrage called Shiva Anicut across the left limb is constructed
for drawing water to Bangalore Water supply, shiva and Shimsha
Power Houses. The details of the anicut are as follows:
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A) Bed level of the river at anicut : 604.964 m.
B) Top level of the anicut : 615.400 m.
C) Length of the anicut : 682.450 m
D) Maximum Flood in the river as provided for : 16990 Cumecs (6.00 lakh cusecs)
E) Maximum Depth of discharge over Anicut : 4.11 m.
F) Storage Capacity : 4.96 Lakh Cum (0.018 TMC)
Water is drawn directly from Shiva anicut through a channel to Shiva
balancing reservoir and the discharge quantity is 73.60 cumecs.
From the balancing reservoir a portion of water (45.30 Cumecs) will
flow to Shiva power house and remaining water (25.30Cumecs) will
go to Bangalore water supply and Shimsha power house. At present
the quantum of water drawn for Bangalore water supply is 12.74
cumecs throughout the year.
8.2.3 Shiva Power House:
The total installed capacity of the generating station is 42 MW and
the details are as follows:
a) No of machines : 10 Nos.
b) Capacity : 42 MW (4 units of 6.00MW and 6 units of 3.00 MW).
c) Water usage : 41.57 Cumecs.
d) Annual energy generation(Rated) : 368 MU.
8.2.4 Shimsha Power House:
The water from the Shiva balancing reservoir flows to another small
reservoir called Nettakallappa reservoir. Water is drawn to Bangalore
water supply from this reservoir. The water for the Shimsha
generating station is also drawn from Netkal balancing reservoir. The
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total installed capacity of the generating station is 17.20 MW and the
details are as follows:
a) No of machines : 2 Nos.
b) Capacity : 2 units of 8.6 MW
c ) Water usage : 12.17 Cumecs.
d) Annual energy generation (Rated) : 150 MU.
8.2.5 Bangalore Water Supply Scheme:
The water for the Bangalore water supply is drawn from Netkal
Balancing Reservoir. The quantity of water drawn is 12.74 Cumecs
(450 cusecs). This water is drawn continuously throughout the year.
In order to meet the growing demand of Bangalore, work for drawing
additional water from Cauvery river near Shivasamudram is under
progress. The requirement of water for Bangalore is estimated at 20
Cumecs.
8.2.6 Power potential studies:
A weir is proposed across the right limb with its FRL coinciding with
the FRL of the existing weir on the left bank thus forming a common
reservoir. The water is proposed to be drawn from this weir for power
generation. The water passes through the pressure shaft to the
underground power house. The water after power generation at the
underground power house joins the Cauvery river through an trail
race tunnel. The layout of the scheme is presented vide drawing No.
SRRP/Civil/05 & 06.
8.2.6.1 From the flows available at the site in Cauvery river at
Shivasamudram, first priority is given for Bangalore water supply at
the rate of 20 cumecs. The requirement of water for the existing
Shiva and Shimsha power houses is of the order of 53.74 cumecs
for a maximum generation of 59.2 MW. The generating units at the
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above power houses are old and the head under which the units are
operated is also less compared to the head available at the
proposed Shivasamudram scheme. Hence it is proposed to give next
priority for allocation of water to the proposed Shivasamudram
scheme. With this allocation it is possible to generate more power for
the same quantity of water. In order to compute the actual
generation from all the existing and proposed power houses, power
potential studies are done for two cases
1. Total Energy generation from all the power houses by giving
priority in water allocation to the existing Shimsha and Shiva
power houses and
2. Total Energy generation from all the power houses when priority
is given to allocation of water to the proposed Shivasamudram
scheme over the existing power houses.
8.2.6.2 The difference in the energy generation from the above two cases
will indicate the quantity of energy benefit from the proposed priority
in water allocation. The actual energy benefit from the scheme is
computed by deducting the energy loss at the existing power houses
from the energy generation at Shivasamudram with priority in water
allocation to Shivasamudram scheme.
8.2.6.3 The daily discharge data at Kollegal gauge site collected from CWC
gauging site for 42 years from 1971-72 to 2012-13 is used for power
potential studies. Studies are first done for unrestricted installed
capacity for all the years and with 100% machine availability. The
annual energy is then arranged in descending order and
dependability is worked out. The 90% dependable year is then
worked out. The 90% dependable energy corresponds to the year
2002-03. The details are enclosed as Annexure in volume II of the
report.
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8.2.6.4 An installed capacity of 200 MW with an annual average (42 years)
energy potential of 930.59 MU with a load factor of 53.11 % is
selected and adopted for the main underground power house of the
project. In order to utilize the lean flows during non monsoon months
it is proposed to adopt 2 units of 100 MW each for the UGPH.
8.2.7 Design Energy:
8.2.7.1 Power potential studies for the selected capacity of 2 x 100 MW for
UGPH and the corresponding potential at the existing Shimsha and
Shiva power houses have been prepared for all the 42 years for
which the daily data is available. The studies have been done for two
cases viz. i) with priority of water allocation to the existing projects
and ii) with priority in water allocation to the proposed
Shivasamudram scheme. The details are enclosed as Annexure in
volume II of the report.
8.2.7.2 An abstract of annual energy potential at all the existing and
proposed power houses and the actual energy benefit from the
proposed scheme for the years from 1971-72 to 2012-13 is prepared
and enclosed as Annexures. The average (42 years) annual energy
potential from the proposed scheme is 930.59 MU with an annual
average load factor of 53.12 %.
8.2.7.3 The power potential studies are done for the proposed installed
capacities of 2 x 100 MW for the 90% dependable year (year 2002-
03) considering machine availability of 95%. The annual energy
benefit from the proposed scheme works out to 815.09 MU and is
considered as the design energy for calculating the tariff. The details
are enclosed as Annexure in volume II of the report.
8.3 Studies for optimization of storage:
8.3.1 The live storage available in the proposed Shivasamudram reservoir
is only 0.73 M cum which is sufficient for a full generation of 300 MW
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(ultimate capacity) for only one hour. The storage is just sufficient for
moderation of flows for drawing water to the power house. The
question of optimization of storage in the reservoir does not arise.
8.4 Month-wise, 10 daily availability of power and energy & peaking
capabilities:
8.4.1 The 10 daily power and energy potential is also prepared and
presented for all the 42 years from 1971-72 to 2012-13 for which
flow data is available. The abstract is enclosed as Annexure. As the
available storage is very less, no peaking facility is available.
8.5 Optimization of installed capacity and unit size studies carried
out:
8.5.1 The power potential studies are worked out for the 90% dependable
year with installed capacity at the main power house (UGPH) varying
from 120 MW to 450 MW in increments of 30 MW to decide the
optimum installed capacity for the project.
8.5.2 The following aspects are considered in the power studies:
The daily flows at Kollegal gauge site is considered for the
studies
The evaporation losses are neglected as the water spread area is
very meager.
The weighted reservoir level between FRL (EL 614.5 m) and
MDDL (EL 610.0 m) is taken as the operating level of the
reservoir.
The tail water level for the main underground power house is
taken as EL 440 m
A total head loss of 2.45 m from all the components up to the
underground power house is considered constant for all
discharges.
The combined Turbine-Generator efficiency is taken as 91%.
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The machine availability factor is considered at 100%.
8.5.3 The results of the studies with various installed capacities are as
listed below.
Installed Capacity (UGPH)
Annual energy for the 90% dependable year
Load Factor (%)
120.0 MW 583.92 55.54
150.0 MW 693.68 52.79
180.0 MW 786.03 49.84
210.0 MW 865.37 47.04
240.0 MW 923.84 43.94
270.0 MW 94.84 41.08
300.0 MW 1010.57 38.45
330.0 MW 1041.67 36.03
360.0 MW 1069.78 33.92
390.0 MW 1094.92 32.04
420.0 MW 1114.06 30.28
450.0 MW 1130.29 28.67
Phase I
200.0 MW 841.73 48.04
8.5.4 Though the total energy for the 90% dependable year for an installed
capacity of 2 x 100 = 200 MW is 841.73 MU, if the loss in generation
at the existing Shiva power house of 143.99 MU is considered then
the actual energy benefit from the proposed Shivasamudram
scheme works out to 697.73 MU with a load factor of 39.83 %. From
the above studies carried out an installed capacity of 200 MW for the
main underground power house is selected.
8.5.5 In order to utilize the lower discharges in the river, it is proposed to
have 2 units of 100 MW for the underground power house.
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CHAPTER IX
DESIGN OF CIVIL STRUCTURES
9.1 Structures and layout:
9.1.1 Shivasamudram run of the river power project is proposed across
right limb of the Cauvery river at the upstream of Bharachukki falls.
The scheme envisages the construction of pick up weir, approach
channel, intake structure, pressure shaft and UGPH. Tail race water
will be let in to the Cauvery river through tail race tunnel. The
proposed scheme is explained in the report. The layout plan is
enclosed vide Drawing No. SRRP/Civil/05 & 06.
9.2 General
9.2.1 i) Head works – site and vicinity
It is proposed to construct a weir with a maximum height of 15m
across right limb of Cauvery river on the upstream of Bharachukki
falls. It is also proposed to strengthen the existing Earthen bund on
the left bank of the river from weir up to Tippu bridge. This proposed
earthen bund will provide access road to left bank of the weir site.
The bund will also protect the Existing Island from submersion thus
reducing the area of submersion of cultivated lands. The intake
channel is situated on the right bank of the river at distance of 150m
upstream of the proposed weir site. It is proposed to construct new
roads leading to intake structure and weir on the right bank.
The water from intake channel is led into water conductor system
through intake structure. The intake structure is provided with trash
rack and provisions are made for stop log gate & emergency gate.
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9.2.2 ii) Reason for the choice of the layout
The topography of the area is such that the weir selected for
diversion is an ideal location to draw water for power generation. The
main advantages of the weir location are
a) The reservoir and the flood water level will be confined to the river
course and the area of submergence is limited.
b) On the bed of the proposed weir alignment massive granite
gneiss are found exposed.
c) The weir site is accessible from both the banks.
d) Just 150 m on the upstream of the proposed weir site, there is a
valley ideal for locating the intake.
e) The hillock just after the intake is an ideal for locating the
underground power house
f) The distance to the tailrace exit will be shortest from the proposed
power house location.
9.2.3 iii) Type of structure - Weir
The proposed weir is an 8 m high concrete un-gated Ogee spillway
with flip bucket with provision for energy dissipation. The height of
the non over flow section is 15 m. Two numbers of sluices are
provided for flushing out the silt deposit. On the right bank the non
over flow portion of weir is abutted to the soil mound and on the left
bank the non over flow section of the weir is provided with two
numbers of limbs for stability purpose as no suitable place is
available for abutting the structure. The ends portion of are backfilled
with all-round protection with pitching. The details are shown in
drawing no. SRRP / Civil / 10 to 14.
9.2.4 iv) Layout of structures
9.2.4.1 a. Intake structure:
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Intake channel is provided on the right bank of the river at distance
of 150 meter upstream of the weir. The CC Intake structure is
proposed. It consists of Trash rack arrangements with one stop log
gate which is operable from gantry and one emergency gate which is
operable from hydraulic hoist. The details are shown vide drawing
No. SRRP/Civil/15 & 16.
9.2.4.2 b. Pressure shaft and penstock
The water conductor system consists of one pressure shaft of size
6.90m diameter with steel liner and bifurcates into Three Penstocks
of size 3.05m dia. with CC Lining and permanent supports.
Necessary provisions for Permanent supporting, spacing of Anchor
rods, consolidation grouting, contact grouting and shotcreating
wherever required for different class of rock classifications are made.
As the length from Intake to UGPH is very short, head race tunnel &
surge shaft are not provided. The details are shown vide drawing No.
SRRP/Civil/ 17 to 19.
9.2.4.3 c. Power House
It is proposed to construct an underground power house(UGPH) at a
depth of 160m from the surface. The UGPH is at a distance of 205 m
east of intake structure. In the UGPH complex the following
provisions are made:
Machine hall & repair bay in PH cavern – The machine hall
accommodates two generating units each of 100 MW capacity.
The power house cavern is 68m long, 21m wide and 44.73m
high with the deepest foundation at EL 420.00 M and crown of
the power house being at EL 464.73m. The generator floor level
is EL 444.73m and the crane beam level is EL 456.73m.
Provision for ventilation to PH cavern is made by means of a 2m
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dia ventilation tunnel. Provision is also made to seat one
additional generating unit of 100 MW capacity.
Transformer Cavern – The transformer cavern is 78m long, 17m
wide and 15m high, the floor level is EL 444.73m and the crown
level is 459.73m. The transformer caver in connected to the
UGPH cavern by three no’s of bus duct tunnel of size 4.5m x
4.5m, one ‘D’ shaped tunnel of size 9m x 7m and one
emergency tunnel of size 5m x 3m.
The outdoor yard is located on the surface. The HT cable
connecting the transformers to ODY run through an inclined
cable tunnel of size 5m x 5m.
Tail race collection cavern – The tail race collection chamber is
68m long, 14m wide and 22.33m high with the deepest
foundation at EL 435.5m and the crown being at EL 457.83m.
The water is discharged through D shaped concrete lined tunnel
of size 9m x 9m and length 4500 m.
Separate niches for Workshop, Air conditioning, HVWS, DG set,
Toilet and security rooms have been proposed.
All the details are shown vide drawing No. SRRP/Civil/20 to 22.
9.3 Geology, Seismicity and foundations
9.4 Alternative studies
9.4.1 1) Weir:
The Cauvery river from the downstream of Kollegal bridge bifurcates
into two limbs, falls down the Gorge from both the limbs at
Gaganachukki and Bharachukki falls, and after the falls joins to form
a single stream. The Cauvery river which was flowing in north
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direction before the falls turns towards right and starts flowing in east
direction. Hence the diversion structure has been on the right limb of
the river. The stretch of the river from Kollegal bridge to the
Bharachukki falls on the right limb is only 5 Km.
9.4.2 A suitable site has been selected for the weir at a distance of 1 km
on the upstream of the falls. The FRL of the weir is fixed at EL 615.4
m so as to match with the FRL of the existing Shiva Anicut on the left
limb of Cauvery river. The MWL for the 100year return period flood is
EL 619.4 m. The left bank bund level is EL 614 m. Initially the weir
was extended beyond the left bank for a distance of 300 m. On the
left bank of the right limb is fertile agricultural land which would
submerge with this proposal. In order to safeguard this agricultural
land, a retaining wall and an earthen bund is proposed all along the
left bank with its top at an elevation of one meter above the MWL is
now proposed. With this proposal the length of the weir got reduced
by 300 m and submersion of agricultural land is avoided.
9.4.3 ii) Intake and head works:
At around 150 m on the upstream of the proposed weir where is a
small valley on the right bank of the river which is an ideal location
for the intake and other head works. No alternatives are available for
studies for intake and head works.
9.4.4 iii) Power House
The ground level after the intake and head works is around EL 600
m. The tail race exit is at a distance of around 4.5 km from the head
works. The elevation at the tail race exit is EL 405 m. Hence an
underground power house immediately next to the head works is
most appropriate. One single power house was first proposed for
utilizing the entire head between the weir FRL of EL 614.5 m and tail
water level of EL 405 m. The proposal was then changed as there is
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a downstream project proposed across Cauvery namely Mekedatu
project comprising of a reservoir with FRL at EL 440 m. If the
downstream project is implemented, the proposed power house will
get submerged. In order to safeguard the power house from
submersion, the underground power house is raised so that the
tailrace level is at EL 440m.
9.4.5 iv) Tailrace Tunnel
The first proposal for tailrace tunnel was along a straight line from
power house to the tailrace exit.
9.4.5.1 With the revised proposal of the underground power house, the
alignment of the tailrace tunnel was revised so that the tail race exit
level is El 440 m in a valley between the power house location and
tail race exit. This alternative was found to be expensive.
9.4.5.2 Finally the original tailrace tunnel alignment was slightly modified so
that it opens in the existing valley near the tailrace exit. This proposal
is cheaper and found to be the most suitable alternative for utilizing
the full available potential at Shivasamudram.
9.4.6 The alternative studies made is depicted in the Drawing enclosed
vide Drawing No. SRRP/Civil/08.
9.5 The final layout
9.5.1 After detailed studies of all the alternatives possible, the present
layout with an underground power house is finalized. The finalized
layout is enclosed vide Drawing No. SRRP/Civil/06 & 07.
9.6 Design flood and sedimentation studies
9.6.1 The detailed design flood studies are discussed in Chapter VI. The
inflow design flood considered for the designs and other protective
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measures is 16990 cumecs. The sediment data observed at Kollegal
gauge site is enclosed as Annexure in volume II of the report.
9.7 Free Board
9.7.1 Detailed free board computations for both the proposed weir and the
earthen bund proposed along the left bank of the river is enclosed as
Annexure in volume II of the report. The computations are as per IS
6512 The free board provided is 1.10 m for both concrete and
earthen bund portion.
9.8 River Diversion arrangement – Choice of Design floods
9.8.1 The Cauvery river bifurcates into two limbs on the downstream of
Kollegal bridge. The requirement of water to Bangalore water supply
and for the existing Shiva and Shimsha power houses are drawn
from the left limb of Cauvery river. The proposed Shivasamudram
weir is on the right limb of the Cauvery river. During non monsoon
season the lean flows are being diverted to left limb by a small wall
constructed across the river at the point where the river splits. From
December onwards till monsoon there will not be any flow in the right
limb. The construction of the proposed weir will be taken up during
this period and water will be diverted through the right limb.
9.9 Construction materials
9.9.1 The important construction materials required are soil, sand, rubble,
cement, steel & explosives. The quantities of these materials
required are given below.
Sl.No. Materials Unit Quantity
i) Earth for bund Cum 285900
ii) Sand Cum 80400
iii) Aggregates Cum 221200
iv) Rubble Cum 21500
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Sl.No. Materials Unit Quantity
v) Cement Tonne 62320
vi) Structural steel Tonne 2290
vii) Structural steel for gates Tonne 120
vii) Reinforcement steel Tonne 4250
viii) Steel plates for penstock
(ASTM A285 Grade ‘C’)
Tonne 950
Steel plates for penstock
(ASTM A517 Grade ‘F’)
Tonne 810
viii) Explosives Tonne 300
i) Rubble:
The requirement of rubble is 21500 Cum. One quarry has been
identified to meet the requirement of rubble for the project works.
The quarry is very near to the weir site and easily approachable. The
tunnel muck is also proposed to be utilized for coarse aggregates to
minimize the cost and to utilize a portion of the muck. The samples
collected from the quarry has been tested and found suitable for
construction. The test result is enclosed as Annexure in volume II of
the report.
ii) Aggregates
The requirement of aggregates of various sizes is 221200 cum. The
tunnel muck of suitable quality will be utilized to minimize the cost. If
the quality of tunnel muck is not as per the required standard, the
aggregates are sourced from the quarry identified.
iii) Sand:
The requirement of sand is 80400 Cum. One sand quarry in the
banks of Cauvery river has been identified in Kukkur village.
Sufficient quantity of sand is available from the quarry. The access to
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the sand quarry is via … road. The location of the sand quarry is
enclosed vide drawing. The distance to the sand quarry from the
project site is 35 km.
iv) Water:
It is proposed to use the water from Cauvery river for construction.
The water samples have been collected and tested. The results
indicate that the water is suitable for construction. Adequate water is
available throughout the year.
v) Manufactured Materials:
Cement & Steel will be procured indigenously and transported by rail
up to Maddur and by road from there to various work sites.
Explosives will be transported by road. A magazine of adequate
capacity will be constructed at the work site. The location of the
Magazine building is shown in drawing No. SRRP/Civil/07.
9.10 Details of Model studies:
9.10.1 Model studies have not been proposed for any component. There
are no critical components which needs model studies. However if
necessary model studies will be got done before taking up the
construction.
9.11 The design of weir :
9.11.1 The various components of Shivasamudram Run of the River project
have been explained in the earlier chapters. This chapter deals with
the design aspects of various components of the scheme.
9.11.2 CRITERIA FOR DESIGN:
The concrete over flow portion is designed as as per IS 6934:1973
to pass the design inflow flood.
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The concrete gravity dam for the overflow and non-overflow portions
is designed as per IS 6512:1972 based on the following
assumptions.
1. Unit weight of concrete is assumed as 2.4 tonnes/cum.
2. Uplift pressure :
a) Normal conditions: 100% water pressure at heel corresponding
to FEL, 100% water pressure at the toe corresponding to max.
TWL and tail water pressure plus 1/3 the difference between
the u/s & d/s water pressure at drainage gallery.
b) Extreme condition: 100% water pressure at heel linearly
decreasing to tail water pressure at toe, assuming complete
clogging of the drainage holes.
3. Sliding factor: Tan 0.75 (normal condition).
4. Shear strength of concrete ‘C’ on rock 100 T/M2
5. Shear friction factor a) For normal condition 4.00 b) For extreme condition 2.50
Stability analysis of Non-overflow and overflow sections along with
design of crest profile are enclosed as Annexure in volume II of the
report.
9.11.2.1 SEISMIC CO-EFFICIENT:
The following seismic co-efficients are adopted in the design of the gravity
dam as per IS 1983 - 2002.
1. Horizontal – 0.12 g at the top uniformly reducing to zero at the bottom.
2. Vertical equivalent to half the horizontal acceleration.
The following cases are considered for analysis of the stability of dam as
per IS 6512.
a) Reservoir empties with earthquake from downstream to upstream.
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b) Reservoir full at FRL with earthquake from u/s to d/s and normal
uplift.
c) Reservoir full at FRL with earthquake from u/s to d/s and uplift
corresponding to drains fully clogged.
9.11.2.2 WEIR ACROSS RIGHT LIMB OF CAUVERY RIVER:
The weir is situated just u/s of Barachuki Falls across the river
Cauvery near Buddikatte village of Kollegal taluk in Chamarajanagar
district. This weir along with the existing Shiva Anicut is designed to
accommodate flood of 6 lakh Cusecs. Gates are not provided. The
over flow section is provided in the river bed portion and non over
flow sections on the both the banks. The bed level at this site is EL
607m and FRL is EL 615.4m. The dam foundation level is EL605m.
The height of dam (overflow section) above the average riverbed
level is 10.4m. The riverbed has good foundation rock at depths of 1
to 2m below the river bed. The right flank has an over burden of 1 to
4 m. The detailed drawings are enclosed in drawing volume (volume
IV) of the report.
The water sample test results are enclosed as annexure in volume II
of the report.
9.11.2.3 SILT LOAD COMPUTATION :
Silt load considered is based on the actual measurement made by
CWC at Kollegal Gauge site on the upstream of the weir.
9.11.2.4 FREE BOARD COMPUTATION:
The free board is arrived as per IS 6512 – 1984. The effective fetch
of the water-spread at MWL of EL 619.4m is 0.91km. The wave
height is 0.7m assuming a wind velocity of 118.8 km/hr. The design
wave height is 1.0m above the still water surface.
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9.12 Design of intake, power channel/tunnel, balancing
reservoir/ fore-bay, surge shaft, penstocks, power house,
tailrace, switch yard etc.
9.12.1 SHAFT:
The water conductor system for the main powerhouse is at a
distance of 150m upstream of the weir on the right-bank of the river.
In order to have sufficient rock cover for the Pressure shaft it is
proposed to have an approach channel and then the tunnel starts.
The length of approach channel is 120m. The intake structure is
located at this point.
9.12.2 The ground level at the site is EL 612m and the sill level of the intake
is EL 609.43m. For smooth entry into the Pressure shaft, a trash
rack arrangement is proposed with bell mouth entry. Vertical lift
gates are provided for maintenance purpose. Operation of the gates
is from the platform located at EL 620.5m (above FRL). Suitable
approach to the platform is also provided.
9.12.3 A 120m long approach channel with sloping apron (6:1) connects the
intake structure with the reservoir. The sill level of the weir leading
to the approach channel is EL609.43m, which is below the MDDL of
the reservoir to allow flow of water at minimum load. The intake
structure is designed as per IS:9761 : 1995 and the design is
enclosed as Annexure in volume II of the report. The plan and
section of intake is enclosed vide drw no. SRRP - 9 & 10 of
drawings volume.
9.12.4 PRESSURE SHAFT/PENSTOCKS :
From the intake structure, water is carried through a single pressure
shaft. This is trifurcated onto three penstocks to run three turbines.
The pressure shaft runs horizontally for a length of 30.8m and then it
changes inclination to 510 and the turn is smooth. The diameter of
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pressure shaft is 6.9m. The inclined shaft runs for a length of
212.7m. The pressure shaft trifurcates into three penstocks after
running 14.6 m horizontally and is reduced to 3.05m . The pressure
shaft is proposed to be lined with concrete and steel. The steel liner
calculations have been done taking into consideration of rock mass
pressure and so also the case with penstocks. The penstock leads
the water to Underground Powerhouse. The economic diameter of
the pressure shaft and penstock is calculated as per IS:11625:1986
code stipulations and the calculations are enclosed as Annexure in
volume II of the report.
9.12.5 It is proposed to do consolidation grouting for the hill mass
surrounding the pressure shaft/penstock. Contact grouting will be
done between the concrete lining and the rock and also between
concrete and steel lining.
9.12.6 The details of the Intake structure, and the pressure shaft/penstock
tunnel are shown in the following drgs.
Plan of Intake SRRP /civil/15
Cross-section of Intake SRRP /civil/16
Plan of Penstock & Power House SRRP /civil/17
L-Section of Penstock & Power House SRRP /civil/17
9.12.7 UNDER GROUND POWERHOUSE:
The powerhouse has sufficient rock cover of 180 m above invert
level. The cavern lies in Granite gneiss mass. The powerhouse
complex accommodates three units of 100MW each. The machine
hall itself accommodates the valve chamber. The transformer and
tailrace collection chambers are provided in separate chambers.
The overall dimension of the machine hall is 21 x 42m with a 21m x
21m service bay, a 5m wide end bay and 21m x 18m Annex building.
The height of power house 20.0m from generator floor level and total
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-99
height is 44.75m from lowest level. The hall has provision for control
room and erection bay. One more transformer cavern is proposed at
a distance of 20m from the power house cavern. This will house
transformers. The cavern is of dimension 17m x 78m long with oil
handling bay at the end. The two caverns viz power house cavern
and transformer cavern are connected by three bus duct tunnels of
4.5m ‘D’ shaped for carrying cables. One more cable duct tunnel
runs from the transformer cavern onto control room. Tail race
collection cavern of size 14m x 68 m is proposed at a distance of
80.2 m from transformer cavern. The detailed drawings of both plan
and sectional view of the UGPH is enclosed vide drawing no. SRRP
/Civil/20 to 22.
In order to know the characteristics of the river water and their effect
on the turbine blades Petrological and Petrographic studies of silt
samples have been conducted and the results are enclosed as
Annexure vide volume II of the report.
One ventilation tunnel is proposed to take off from the Machine hall
cavern, the length of the tunnel is about 185m of size 2m and one
HT cable tunnel is proposed to take off from the transformer cavern,
the length of tunnel is about 220m and of size 5 x 5m ‘D’ shaped.
The underground power house will be provided with access tunnel of
length 1800m of ‘D’ shaped of size 7 x 7m. This tunnel will be
utilized for mucking during construction time and will be permanent
access to the UGPH. A loop is provided to take off from this tunnel
to have access to trifurcation Chamber to facilitate construction.
The power house and transformer cavern will also hold other rooms
such as work shop, air conditioner room, HVWS room and toilets as
shown in the drawings. The detailed drawings pertaining to the
different caverns and their approaches are depicted vide drawing no
SRRP /Civil / 22.
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-100
9.12.8 TAIL RACE TUNNEL:
One tailrace tunnel of size 9m x 9m ‘D’ shaped with concrete lining is
provided to lead the released waters from powerhouse back to the
river Cauvery. The tailrace tunnel is of length 4500m. One
construction adit of length 930m to the tailrace tunnel has been
provided. The tail race tunnel is free flow tunnel and is proposed to
be lined. The tunnel will provided with permanent supports as per
the site condition. The detailed longitudinal section and typical cross
sections are enclosed vide drawing no SRRP/Civil / 29 to 32.
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-101
CHAPTER X
ELECTRICAL & MECHANICAL DESIGNS (UGPH)
10.1.00 TURBINE
10.1.01 PREAMBLE a) The Shivasamudram run of the river project across the river
Cauvery consists of Underground Power House of capacity– 2 X
100 MW
b) The Shivasamudram run-of of the River Power generation
scheme across Cauvery river envisages the construction of a high
pick-up weir across the right limb of the Cauvery river at the
upstream of Bharachukki falls and approach channel, intake
structure, pressure shaft, Underground power house consisting of
2X100MW generating units, Access tunnel and a Tailrace tunnel
for discharging the waters.
10.1.02 DESIGN HEAD
(Under Ground Power House consisting of 2 X 100MW)
a) It is proposed to maintain the reservoir at a nearly constant level
as near to FRL as possible to maintain the optimum head for
generation of power at UGPH.
b) The gross design head available is worked out conventionally
considering the FRL, MDDL, maximum and minimum tail water
levels and the same is fixed at 176.26 m. The total head loss in
the water conductor system works out to 2.45 m and the net
design head works out to 173.81 m.
10.1.03 DESIGN DISCHARGE AND INSTALLED CAPACITY
It is proposed to install two units each of 100MW capacity plus 10%
overload capacity. The rated discharge for the rated output at rated
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-102
head is 65.19 m3/ sec and the design discharge of each unit with
10% continuous overload is 71.71 m3/ sec.
10.1.04 MODE OF OPERATION OF THE UNITS
The head available for power generation is around 173.81 m. In a
run of the river scheme, the water availability for power generation
fluctuates from day to day and month to month. Higher installed
capacity means higher cost without corresponding increase in
energy generation. The corresponding installed capacity is 200MW
which is proposed to be installed. There will be two units each of
unit capacity 100MW.
10.1.05 SELECTION OF TURBINE
The maximum gross head is 179.40m and the minimum gross head
is 170.00m. The water conductor loss is 2.45 m. The variation of net
head is between 176.95 m and 167.55 m respectively corresponding
to 101.81% to 96.40% of the rated head of 173.81 m. According to
design calculations, Francis type of turbines is suitable for this head
and head range. (The operating limits of Francis turbine varies
between 65% & 125% of rated head).
10.1.06 RATED SPEED
For the unit capacity of 100MW plus 10% continuous overload
capacity and design head of 173.81 m, the proposed unit rated
speed is 250rpm. The parameters of the turbine for the proposed
speed are as follows:
Particulars 1 Runner discharge diameter in m (D3) 2.88 2 Inner diameter of runner in m (D2) 2.85 3 Top diameter of runner in m (D1) 3.17 4 Length of spiral casing in m 10.72 5 Width of spiral casing in m 9.55 Particulars
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-103
6 Inlet diameter in m 3.04 7 Length of powerhouse in m 68 8 Width of powerhouse in m 21 9 Deepest draft tube elevation in EL m 422.49 10 Centre line setting of turbine in EL m 432.24
However, the rated speed will be decided at the time of
implementation after consulting leading manufacturers of hydro
generating units.
10.1.07 SALIENT FEATURES OF THE TURBINE
The salient particulars of the turbines are as indicated below. 1. Turbine Vertical Francis
2. FRL of Dam EL 615.4m
3. MDDL of Dam EL 610.00m
4. Minimum tail water level EL 436.00m
5. Maximum tail water level EL 440.00m
6. Runner centre line EL 432.24m
7. Head loss in water conductor system 2.45m
8. Maximum Net head 176.95m
9. Minimum Net head 167.55m
10. Rated head 173.81m
11. Rated discharge 65.19 cumecs
12. Discharge at overload capacity 71.71 cumecs
13. No. of units 2
14. Speed of the turbine 250rpm
15. Nominal diameter of runner 2880mm
16. Type of main inlet valve Spherical
10.1.08 DIMENSIONS OF THE POWERHOUSE
a) The powerhouse length and width have been worked out
considering the dimensions of the spiral casing, required concrete
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-104
cover and space for the inlet valve, inspection gallery as per
standard practice. The height of the crane beam from the service
bay has been fixed considering 12m clear height required for
handling turbine runner – shaft assembly during assembly and
lowering. The height above the crane beam upto the roof is fixed
as 8m based on the overall height of similar capacity cranes. The
length of service bay is fixed at one and half times the unit
spacing since there are two units.
b) The powerhouse accommodates 2 units each of 100MW
capacity. The powerhouse measuring 68.00m (L) x 21.00m (W)
has been proposed including Main Inlet Valve and service bay
area. Height of crane beam will be 12m from the service bay.
c) The details of the powerhouse are as detailed hereunder:-
(i) Length of the powerhouse : 68.00m (including MIV & service bay area)
(ii) Width of the powerhouse : 21.00m
(ii) CL of the turbine runner : EL 432.24m
(iv) Service bay level : EL 444.73m
(v) Deepest draft tube point : EL 422.49m
(vi) M/C hall/ generator floor level : EL 444.73m
(vii) Crane beam level : EL 456.73m
(viii) Roof level : EL 464.73m
d) The control room annexe of 18m x 21m is proposed to be housed
adjacent to the service bay. The common auxiliary, battery,
battery charger, LTAC, etc., are proposed to be housed in the
common auxiliary annexe just below the control room.
10.1.09 WATER CONDUCTOR SYSTEM
The water conductor system consists of the following:
� Karnataka Power Corporation Limited
SRRP ‐ DPR, Pg-105
(a) An Approach channel from Approach Weir.
(b) 117.74m long open channel
(c) One pressure shaft of 6.9m diameter and of length 246.87 mtrs
leads the water to two generating units through one bifurcation at
suitable distance. The dia of penstock is 4.0 mtrs.
(d) An underground powerhouse of size 68.00m x 21.00m to house
two generating units, each of 100MW capacity including service
bay & MIV.
(e) The transformers will be housed in separate cavern measuring
68mtrsX17 mtrs with a niche of 17 mtrs X 10 mtrs for oil handling
equipments and 20 mtrs X 10 mtrs niche for workshop
b3) Intermediate Adit to Tail race Tunnel 1014.00 1014.00c) Tail race channel works. 79.00 79.00e1) Penstock - Civil Works 841.00 841.00e2) Penstock - Steel Cost 3669.00 3669.00f1) Under ground Power House, Machine hall, Repair bay & Control room. 3856.00 3856.00
f2) Transformer Hall 772.00 772.00f3) Tail Race Collection Chamber 2101.00 2101.00f4) Out Door Yard & Appurtenant Works 595.00 595.00
M Plantation 20.00 20.00O Miscellaneous 110.00 110.00P Maintenance During Construction (1% of the total
cost under the head C,J & K) 385.42 385.42
Q Special Tools and Plant 200.00 200.00R Communication 360.00 360.00S Power plant and Electro - Mechanical system
A) 3 x100MW Generating unit coupled Vertical Francis Turbine
1.Generating Plant and Equipmenta) Generator, turbine and accessories 20531.25 20531.25b) Auxiliary electrical equipment for power station 1648.39 1648.39
c) Auxiliary equipment and services for power station 665.61 665.61
d) Central Sales Tax @ 2% on 1(a), (b) & ( c ) 456.91 456.91
e) Transportation,handling and Insurance charges@6% of 1(a),(b)&(c) 1370.72 1370.72
f) Erection and commissioning charges @ 8 % of 1 (a),(b) & ( c ) excl. spares 1746.23 1746.23
ABSTRACT
Shivasamudram Run Of The River Power ProjectKarnataka Power Corporation Limited
C
J
SLNo Name of work CIVIL Works
Electro -Mechanical
WorksTotal
S 2. Substation Equipment & auxillary equipment and service of switch yard
(a) Substation equipment and auxiliary equipment and service for Switchyard 1609.87 1609.87
(b) Central sales tax @ 2% om 2(a) 32.20 32.20(c) Transportation,handling and insurance charges @6% on 2(a) 96.59 96.59
(d) Erection and commissioning charges @ 8% of 3(a) excl.spares 126.83 126.83
@ 8% of the total cost under the head C,J & K for Civil Works 3083.36 3083.36
@6% for Electro Mechanical Works 1244.27 1244.272 Tools & Plants Nil3 Suspense Nil4 Receipt And Recoveries (15% of Q - Special T&P &
Vehicles) -30 -30.00
` 43835.14 ` 29839.94 ` 73675.08
B. Indirect Costi. i. Capitalisation of Abutment of Land Revenue 0ii. ii. Audit and Account Charges (@0.5% ) 219.18 149.20 368.38
` 219.18 ` 149.20 ` 368.38
Service Tax @ 14.5% @ 14.5% of the 33% cost under the head C,J & K for Civil Works 1844.23 1844.23
@ 14.5% on erection and commissioning of item 'S' 271.59 271.59
Miscellaneous And roundoff ` 24.45 0.27 24.72
` 45923.00 ` 30261.00 ` 76184.0
Total (B) - Indirect Cost
Total Cost (A + B + Service Tax )
Total (A) - Direct Cost
Total I -Works
ABSTRACT
SL. No. Name of work Amount in lakhs
A - Direct CostI. Works
A Preliminary 562.00B Land 305.00C Works
1) Pick up Weir across right limb of cauvery river, U/S of Bharachukki Falls 5171.002) Approach to pick up weir and protective works.
4262.00J Power plant Civil Works
a) Intake Structure 2563.00b1) Tail race tunnel and exit portal 8920.00b2) Approach Tunnel, Ventilation Tunnel & Cable Duct Tunnel 4699.00b3) Intermediate Adit to Tail race Tunnel 1014.00c) Tail race channel works. 79.00e1) Penstock - Civil Works 841.00e2) Penstock - Steel Cost 3669.00f1) Under ground Power House, Machine hall, Repair bay & Control room. 3856.00Transformer Hall 772.00Tail Race Collection Chamber 2101.00Out Door Yard & Appurtenant Works 595.00
M Plantation 20.00O Miscellaneous 110.00
PMaintenance During Construction (1% of the total cost under the head C,J & K) 385.42
Q Special Tools and Plant 200.00R Communication 360.00X X - Environment and Ecology 201.00
Y
Y - Losses on stock (0.25% of the total cost of C-works, J-Power Plant Civil Works & K -Buildings only) 96.36
` 40781.78
1Establishment Charges (@ 8% of the total cost under the head C,J & K for Civil Works ) 3083.36
2 Tools & Plants
Karnataka Power Corporation Limited
Total I -Works
Shivasamudram Run Of The River Power ProjectEstimate for civil engineering works
Based on KPCL SR-2014-2015
SL. No. Name of work Amount in lakhs
3 Suspense Nil
4Receipt And Recoveries (15% of Q - Special T&P & Vehicles) -30
` 43835.14B. Indirect Cost
i. Capitalisation of Abatement of Land Revenue 0ii. Audit and Account Charges (@0.5% ) 219.18
` 219.18Service Tax @ 12.36% @ 14.5% of the 33% cost under the head C,J & K for Civil Works 1844.23Miscellaneous And roundoff 24.45
` 45923.00
Total A - Direct Cost
Total (B) - Indirect Cost
Total Cost for civil engineering works
Sl Description of works Unit Amount RSNo in Lakhs1 Topographical Investigations
a Departmental surveys for preparing block levels of dam approach tunnel, intake and T R T LS 10.00
b Surveys for colonies. Access roads. Etc LS 5.00
2 Hydrological and Meteorological Investigations. LS 5.00
3 Geological Investigation and Material Testing. LS 20.00
4 Improvement of Inspection paths and Approach Roads. L S 10.00
5 Consultation Charges on Specific problems LS 10.00 6 Printing Project Reports, Estimates and Design
Reports. LS 1.50
7 Vehicles for inspecting officers for inspection LS 5.00
8 Establishing soil testing and other laboratories LS 12.00conducting preliminary tests
9 Hydraulic Model Studies and other Studies LS 5.00
10 Training of Engineers. LS 5.00
11 Surveys and Mathematical Instruments. LS 2.00
12 Miscellaneous and Unforeseen Items. LS 2.88
Already spent 468.62 Total ` 562.00
Estimate for civil engineering worksBased on KPCL SR-2014-15
A- PRELIMINARIES
[ Rupees Five hundred sixty two Lakhs Only ]
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Sl Description of works Unit Qty Rate in Amount RsNo lakhs in Lakhs
1 Compensation for Lands required for township, roads, amenities etc.
a Private land i) For Roads ha 2.98 2.50 7.45 ii) For colony ha 50.76 2.77 140.61
b forest land(Lease amount) ha 90.00 0.012 1.08
2 Provision for Labour and Material for Demarkating Land.( 1 % of Cost of Land) 1.48
3 Add 15% Statutory allowance for Item 1 22.37
4 Establishment charges for acquistionof land @6.25% 9.69
5 Payment of Interest on compensation payable. LS 10.00
6 Legal Charges. LS 15.00
7 Provision for environmental safegaurdssuch as fuel wood etc LS 5.00
8 Cost of compensatory afforestation ha 90.00 1 90.00
9 Miscellaneous and rounding off LS 2.32
Total Rs. ` 305.00
2-B-LANDS
[ Rupees three hundred Five Lakhs Only ]
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
1 Preliminaries such as Surveys, settingouts etc., LS 5.00Excavation for seating the dam, tail channel, spill way, intake structure and appurtenant works including placing neatly or disposing off the excavated stuff as directed etc., with all lead and lifts (R.A-11)
I) all kinds of soil cum 27502.00 80.00 22.00ii) soft rock cum 6208.00 128.00 7.95iii) hard rock cum 12332.00 193.00 23.80
3 Preparation of foundation bed for masonry or concrete including removal of all loose materials, disposing off the same as directed and cleaning the surface with air and water jet etc., complete with all lead and lifts (R.A-15) Sqm 12409.00 40.00 4.96
4 Drilling 30 mm to 35 mm diameter holes by jack hammer in rock, masonry or concrete including cost of all materials, machinery, labour etc.,complete. (RA - 33)
Vertical or inclined upto 10° to vertical Rm 1386.00 160.00 2.225 Fabricating and fixing 22 mm to 32 mm dia
cold twisted deformed steel anchor rods in drilled holes including cost of all materials, machinery, labour, cleaning and flushing the holes, grouting with cement slurry etc., complete with initial lead upto 50 m and all lifts(excluding cost of steel). (RA -34)
Rm 2772.00 68.40 1.906 Providing and laying insitu vibrated cement
concrete M-15 using approved, clean, hardgraded aggregates including cost of allmaterials, machinery,labour,form work,centring, scaffolding, cleaning, batching,mixing, placing in position , levelling ,vibrating, finishing, curing etc., completewith all lead and lifts, using 40mm and downcourse aggregates and 28 days cubecompressive strength not less than15N/sqmm(150 kg/sqcm) cementcontent=270 Kg/cum; Levelling course,foundation filling, backfilling and similarworks. (R.A - 2)
levelling course cum 3534.00 5360.05 189.42
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
3 C- WORKSC 1 PICK UP WEIR ACROSS RIGHT LIMB OF
CAUVERY RIVER U/S OF BHARACHUKKI FALLS
Description of works Unit Qty Rate in Rs. Amount Rs in lakhs
SlNo.
2
Description of works Unit Qty Rate in Rs. Amount Rs in lakhs
SlNo.
7 Providing and laying insitu vibrated cementconcrete M-15 using approved, clean, hardgraded aggregates including cost of allmaterials, machinery,labour,form work,centring, scaffolding, cleaning, batching,mixing, placing in position , levelling ,vibrating, finishing, curing etc., completewith all lead and lifts, using 80mm and downcourse aggregates and 28 days cubecompressive strength not less than15N/sqmm(150 kg/sqcm) cementcontent=240 Kg/cum--Gravity type retaingwalls, by-pass weirs and similar works., (R.A-1)
(for weir body) cum 61261.00 5632.50 3450.538 Providing and laying insitu vibrated cement
concrete M-20 using approved, clean, hardgraded aggregates including cost of allmaterials, machinery,labour,form work,centring, scaffolding, cleaning, batching,mixing, placing in position , levelling ,vibrating, finishing, curing etc., completewith all lead and lifts, using 40mm and downcourse aggregates and 28 days cubecompressive strength not less than20N/sqmm(200 kg/sqcm) cementcontent=320 Kg/cum (R.A-10)
(For by pass weirs & retaining wall) cum 13947.00 6205.90 865.549
Providing and laying insitu vibrated cement concrete M-25 using approved, clean, hard graded aggregates including cost of all materials, machinery,labour,form work, centring, scaffolding, cleaning, batching, mixing, placing in position , levelling , vibrating, finishing, curing etc., complete with all lead and lifts, using 40mm and down course aggregates and 28 days cube compressive strength not less than 25N/sqmm(250 kg/sqcm) cement content=380 Kg/cum (R.A-20) Cum 115.00 6299.80 7.24
10 Providing , Fabrication and placing inposition reinforcement steel for RCC worksincluding cleaning, strightening, cutting,bending, hooking, lapping, welding whereverrequired, binding with 1.25mm diameter softannealed steel wire, including cost of allmaterials, labour, machinery, (including costof reinforcement and including wastage)etc.,m complete with all lead and lifts. (R.A-5)
t 283.00 56622.50 160.24
Description of works Unit Qty Rate in Rs. Amount Rs in lakhs
SlNo.11a Drilling 45 mm to 50 mm diameter holes by
percussion drillling using wagon drill or any other suitable machinery in rock, masonry or concrete including cost of all materials, machinery, labour etc., complete with all led and lifts (R.A-30) Rm 2772.00 745.00 20.65
11b Flushing grout holes of all sizes alternatively with water and air jets for an averageperiod of 30 minutes including water intake observations, cost of all materials, machinery, labout etc., complete (R.A - 54)
grouting in drilled holes by stage grouting method under preassure as directed, with cement slurry including cost of all materials, machinery, labour, redrilling if necessary etc., with all lead and lifts (R.A-9)
t 70.00 12470.00 8.7313a Providing sluice gate of size 2 x 2.3 m
with embeded parts t 8.50 95000.00 8.0813b Hoisting arrangement for the sluice gate
Set 1.00 1000000.00 10.0014 Back filling the excavated trench on the D/S
of dam in layers using avilable free draining material, including cost of all materials, machinery, labour, tamping etc., complete with all lead & lifts (R.A-14)
cum 5501.00 246.50 13.5615 Back filling the excavated trench on the U/S
of dam with soil from approved borrow areas including cost of all materials, machinery, labour, all operations such as excavation, sorting, spreading, watering and compaction in layers of 10 to 15 cm by pneumatic rammers etc., complete with initial lead upto 1 km and all lifts. (R.A - 35)
cum 2751.00 327.50 9.0116 Dewatering and desilting charges L S 97.0017 River diversion by providing sand bags
across the river wherever necessary L S 10.0018 Instrumentation to the Dam L S 5.0019 Contengencies at 3% 147.75
20 Work charged establishment @2% and rounding off 98.29
Total Rs. ` 5171.00
[ Rupees Five thousand one hundred seventy one Lakhs Only ]
1 Preliminaries such as jungle clearance &mark out etc., 3.00Excavation for seating the dam, tail channel, spillway, intake structure and appurtenant worksincluding placing neatly or disposing off theexcavated stuff as directed etc., with all lead and lifts(R.A-11)I) all kinds of soil cum 29199 80.00 23.36ii) soft rock cum 5016 128.00 6.42iii) hard rock cum 2508 193.00 4.84
3 Drilling 30 mm to 35 mm diameter holes by jackhammer in rock, masonry or concrete including costof all materials, machinery, labour etc.,complete. (RA -33)Vertical or inclined upto 10° to vertical Rm 3600 160.00 5.76
4 Fabricating and fixing 22 mm to 32 mm dia coldtwisted deformed steel anchor rods in drilled holesincluding cost of all materials, machinery, labour,cleaning and flushing the holes, grouting with cementslurry etc., complete with initial lead upto 50 m and alllifts(excluding cost of steel). (RA -34)
M-15 using approved, clean, hard graded aggregatesincluding cost of all materials, machinery,labour,formwork, centring, scaffolding, cleaning, batching,mixing, placing in position , levelling , vibrating,finishing, curing etc., complete with all lead and lifts,using 40mm and down course aggregates and 28days cube compressive strength not less than15N/sqmm(150 kg/sqcm) cement content=270Kg/cum; Levelling course, foundation filling,backfilling and similar works. (R.A - 2)
cum 4751 5360.05 254.666 Providing and laying insitu vibrated cement concrete
M-15 using approved, clean, hard graded aggregatesincluding cost of all materials, machinery,labour,formwork, centring, scaffolding, cleaning, batching,mixing, placing in position , levelling , vibrating,finishing, curing etc., complete with all lead and lifts,using 80mm and down course aggregates and 28days cube compressive strength not less than15N/sqmm(150 kg/sqcm) cement content=240Kg/cum--Gravity type retaing walls, by-pass weirs andsimilar works., (R.A-1) Cum 53092 5632.50 2990.41
C 2 - APPROACH TO PICKUP WEIRAND PROTECTIVE WORKS
Description of worksSl No. Unit Qty Rate in Rs. Amount Rs.
In lakhs
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
2
Description of worksSl No. Unit Qty Rate in Rs. Amount Rs.
In lakhs
7 Stone pitching providing and constructing 45 cm thickrough stone pitching aver 15 cm thick 40 mm sizeaggregate backing including cost of all materials,machinery, labour etc., complete with all lead and lifts(R.A-12) Sqm 37174 994.95 369.86
8 Providing embankment with homogenous soil fromexcavation in layers of 25 to 30 cm including cost ofall materials, machinery,labour, all operations asexcavation, clods, sectioning, watering & compactionto the required density control not less than 97%,using, sheep foot/pad foot roller as stipulated etc.,complete, with all lead and lift (R.A-13)
cum 148777 149.50 222.429 Providing , Fabrication and placing in position
reinforcement steel for RCC works includingcleaning, strightening, cutting, bending, hooking,lapping, welding wherever required, binding with1.25mm diameter soft annealed steel wire, includingcost of all materials, labour, machinery, (includingcost of reinforcement and including wastage) etc.,mcomplete with all lead and lifts. (R.A-5)For anchor rods t 46 56622.50 26.05
10 Providing and laying of soling(150mmthick),metalling(80mm thick), watering, consolidation,murrum spreading and 20mm thick Chip carpetingwith seal coat etc., complete with all leads and lifts -for 4m wide. (R.A - 36) Km 3 2230501.0 66.92
11 Dewatering and desilting charges L S 80.0012 Contigencies at 3% 121.7613 Work charges Establishment charges at2 % and
rounding off. 81.63Total Rs. ` 4262.00
[ Rupees four thousand two hundred sixty two Lakhs Only ]
1 Preliminaries LS 4.002 Excavation for seating the dam, tail channel,
spill way, intake structure and appurtenantworks including placing neatly or disposingoff the excavated stuff as directed etc., withall lead and lifts (R.A-11)
I) In all kinds of soil Cum 63867 80.00 51.09 ii)In soft Rock. Cum 35644 128.00 45.62iii) hard rock cum 35644 193.0 68.79
3 Preparation of foundation bed for masonry orconcrete including removal of all loosematerials, disposing off the same as directedand cleaning the surface with air and waterjet etc., complete with all lead and lifts (R.A-15) SQM 7077 40.00 2.83
4 Providing and laying insitu vibrated cementconcrete M-15 using approved, clean, hardgraded aggregates including cost of allmaterials, machinery,labour,form work,centring, scaffolding, cleaning, batching,mixing, placing in position , levelling ,vibrating, finishing, curing etc., complete withall lead and lifts, using 40mm and downcourse aggregates and 28 days cubecompressive strength not less than15N/sqmm(150 kg/sqcm) cementcontent=270 Kg/cum; Levelling course,foundation filling, backfilling and similarworks. (R.A - 2)
Cum 2123 5360.05 113.795 Providing and laying insitu vibrated cement
concrete M-15 using approved, clean, hardgraded aggregates including cost of allmaterials, machinery,labour,form work,centring, scaffolding, cleaning, batching,mixing, placing in position , levelling ,vibrating, finishing, curing etc., complete withall lead and lifts, using 80mm and downcourse aggregates and 28 days cubecompressive strength not less than15N/sqmm(150 kg/sqcm) cementcontent=240 Kg/cum--Gravity type retaingwalls, by-pass weirs and similar works., (R.A-1)
Cum 9019 5632.50 508.00
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - a - INTAKE STRUCTURE
Sl.No. Description of works Unit Qty Rate in Rs. Amount Rs. In
lakhs
Sl.No. Description of works Unit Qty Rate in Rs. Amount Rs. In
lakhs6 Providing and laying insitu vibrated cement
concrete M-25 using approved, clean, hardgraded aggregates including cost of allmaterials, machinery,labour,form work,centring, scaffolding, cleaning, batching,mixing, placing in position , levelling ,vibrating, finishing, curing etc., complete withall lead and lifts, using 40mm and downcourse aggregates and 28 days cubecompressive strength not less than25N/sqmm(250 kg/sqcm) cementcontent=380 Kg/cum (R.A-17)
For the intake structure Cum 10756 6589.80 708.807 Drilling 30 mm to 35 mm diameter holes by
jack hammer in rock, masonry or concreteincluding cost of all materials, machinery,labour etc.,complete. (RA - 33)
Inclined 45° to 90° to vertical Rm 1500 176.00 2.648 Fabricating and fixing 22 mm to 32 mm dia
cold twisted deformed steel anchor rods indrilled holes including cost of all materials,machinery, labour, cleaning and flushing theholes, grouting with cement slurry etc.,complete with initial lead upto 50 m and alllifts(excluding cost of steel). (RA -34)
Rm 3000 68.40 2.059 Providing , Fabrication and placing in
position reinforcement steel for RCC worksincluding cleaning, strightening, cutting,bending, hooking, lapping, welding whereverrequired, binding with 1.25mm diameter softannealed steel wire, including cost of allmaterials, labour, machinery, (including costof reinforcement and including wastage)etc.,m complete with all lead and lifts. (R.A-5) t 1068 56622.50 604.73
10 Providing embankment with homogenoussoil from excavation in layers of 25 to 30 cmincluding cost of all materials,machinery,labour, all operations asexcavation, clods, sectioning, watering &compaction to the required density controlnot less than 97%, using, sheep foot/padfoot roller as stipulated etc., complete, withall lead and lift (R.A-13)
Cum 61267 149.50 91.5911a Providing Gate to Intake of HRT 5.6 x 7.35 m
t 56 95000.00 53.20b Embedded Parts for gate
t 40 76000.00 30.40c Hoisting arrangements
Set 2 5000000.00 100.00
Sl.No. Description of works Unit Qty Rate in Rs. Amount Rs. In
lakhs12 Trash rack for intake (30 Panels) with
embeded parts t 5.4 95000 5.1313 Dewatering and desilting charges L S 48.0014 Contengencies at 3% 73.2215 Work charged establishment @ 2% and
rounding of 49.11Total Rs. ` 2563.00
[ Rupees two thousand Five hundred sixty three Lakhs Only ]
1 Preliminaries such as Surveys, setting out etc., LS 5.00
2 Excavation for tunnel by tunnelingmethods including excavation forsupports in all types of soil/rock stratarequiring supports including shoring,strutting and cost of all materials,machinery, labour, scaling excavatedsurface, ventilition, lighting, drainage,removing and hauling excavatedmuck outside tunnel upto specifieddump area and all other ancillaryoperations etc., complete with all leadand lifts (R.A-18) cum 333590.00 1880.00 6271.49
3 Providing and laying insitu vibratedcement concrete M-25 usingapproved, clean, hard gradedaggregates including cost of allmaterials, machinery,labour,formwork, centring, scaffolding, cleaning,batching, mixing, placing in position ,levelling , vibrating, finishing, curingetc., complete with all lead and lifts,using 40mm and down courseaggregates and 28 days cubecompressive strength not less than25N/sqmm(250 kg/sqcm) cementcontent=380 Kg/cum (R.A-20)
Cum 15540.00 6299.80 978.994 Providing and fixing 25mm dia steel
rock bolts with machanical/wedgetype anchorage including drilling35mm dia holes, providing 15 cmlong 20mm thick steel tapered wedge, 10mm thick 20cm*20 cm platewasher and nuts, tightening bolt bytorque wrinch, cost of all materials,machinery, labour, ventilition, lighting,drainage and all other ancillaryoperations etc., complete with all leadand lifts (R.A-19) Rmt 13740.00 1065.00 146.33
Rate in Rs. Amount Rs. In lakhs
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - b1 -TAIL RACE TUNNEL & EXIT PORTAL WORKS
Sl.No. Description of works Unit Qnty
Rate in Rs. Amount Rs. In lakhs
Sl.No. Description of works Unit Qnty
5 Providing, Fabricating, transportingto the site, hoisting and erectingstructural steel member fabricatedfrom rolled steel sections likechannels, angles, flats, I-sections,plates, rails etc., as per drawingincluding cost of all materials,machinery, labour, operations suchas cutting, bending, grinding, weldingetc., and providing one coat of zincchromate red oxide primer afterscrapping and cleaning the surface,scaffolding etc., complete with all leadand lifts including cost of steel (R.A-8) MT 680.00 76228.35 518.35
6(a)
Drilling 32 mm to 35mm diametergrout holes in concrete/rockbypercusion drilling using jack hammeror stooper drills as directed tospecified depth for consolidation/contact grouting including of all costof all materials, machinery, labour,redrilling where ever necessary,ventilition, lighting, drainage and allother ancillary operations etc.,complete with all lead and lifts (R.A-21) Rmt 13740.00 296.00 40.67
7 Flushing grout holes of all sizesalternatively with water and air jets foran averageperiod of 30 minutesincluding water intake observations,cost of all materials, machinery,labout etc., complete (R.A - 54) Rmt 13740.00 77.20 10.61
8 Grouting: consilidation /curtaingrouting in drilled holes by stagegrouting method under preassure asdirected, with cement slurry includingcost of all materials, machinery,labour, redrilling if necessary etc.,with all lead and lifts (R.A-9) MT 700.00 12470.00 87.29
Rate in Rs. Amount Rs. In lakhs
Sl.No. Description of works Unit Qnty
9 Providing , Fabrication and placing inposition reinforcement steel for RCCworks including cleaning,strightening, cutting, bending,hooking, lapping, welding whereverrequired, binding with 1.25mmdiameter soft annealed steel wire,including cost of all materials, labour,machinery, (including cost ofreinforcement and includingwastage) etc.,m complete with alllead and lifts. (R.A-5) MT 575.00 56622.50 325.58
10 Removing and hauling overfallenmuck due to natural causes such asgeological faults etc., out of tunnelincluding breaking any largefragments by blasting if necessaryand disposing off the same inspecified dump area or as directedincluding cost of allmaterials,machinery, labour,ventilition, drianage,lighting and allother ancillary operations etc.,complete with all lead and lifts.(R.A-22) cum 6670.00 392.00 26.15
11 Dewatering and desilting charges LS 85.0012 Contingencies at 3 % 254.8613 Work charge Establishment at 2 %
and rounding off. 169.68Total Rs. ` 8920.00
[ Rupees eight thousand nine hundred twenty Lakhs Only ]
1 Preliminaries such as Surveys and setting out etc., LS 5.00Excavation for seating the dam, tailchannel, spill way, intake structureand appurtenant works includingplacing neatly or disposing off theexcavated stuff as directed etc., withall lead and lifts (R.A-11)i) all kinds of soil cum 22845 80.00 18.28ii) soft rock requiring blasting cum 5919 128.00 7.58iii) hard rock cum 13810 193.00 26.65
3 Excavation for tunnel by tunnelingmethods including excavation forsupports in all types of soil/rockstrata requiring supports includingshoring, strutting and cost of allmaterials, machinery, labour, scalingexcavated surface, ventilition,lighting, drainage, removing andhauling excavated muck outsidetunnel upto specified dump area andall other ancillary operations etc.,complete with all lead and lifts (R.A-18) cum 135975 1880.00 2556.33
4 Providing and fixing 25mm dia steelrock bolts with machanical/wedgetype anchorage including drilling35mm dia holes, providing 15 cmlong 20mm thick steel taperedwedge , 10mm thick 20cm*20 cmplate washer and nuts, tighteningbolt by torque wrinch, cost of allmaterials, machinery, labour,ventilition, lighting, drainage and allother ancillary operations etc.,complete with all lead and lifts (R.A-19) RMT 39180 1065.00 417.27
2
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
5 Providing and laying insitu vibratedcement concrete M-20 usingapproved, clean, hard gradedaggregates including cost of allmaterials, machinery,labour,formwork, centring, scaffolding, cleaning,batching, mixing, placing in position ,levelling , vibrating, finishing, curingetc., complete with all lead and lifts,using 40mm and down courseaggregates and 28 days cubecompressive strength not less than20N/sqmm(200 kg/sqcm) cementcontent=320 Kg/cum (R.A-10) b)Adit, intakte, lift shaft shaft & similecum 12060 6120.90 738.18
6 Providing , Fabrication and placing in position reinforcement steel for RCCworks including cleaning,strightening, cutting, bending,hooking, lapping, welding whereverrequired, binding with 1.25mmdiameter soft annealed steel wire,including cost of all materials,labour, machinery, (including cost ofreinforcement and includingwastage) etc.,m complete with alllead and lifts. (R.A-5) MT 376 56622.50 212.90
7(a)
Drilling 32 mm to 35mm diametergrout holes in concrete/rockbypercusion drilling using jackhammer or stooper drills as directedto specified depth for consolidation/contact grouting including of all costof all materials, machinery, labour,redrilling where ever necessary,ventilition, lighting, drainage and allother ancillary operations etc.,complete with all lead and lifts (R.A-21) RMT 6888 296.00 20.39
7(b)
Flushing grout holes of all sizesalternatively with water and air jetsfor an averageperiod of 30 minutesincluding water intake observations,cost of all materials, machinery,labout etc., complete (R.A - 54) RMT 6888 77.20 5.32
Qnty Rate in Rs. Amount Rs. In lakhs
Sl. No. Description of works Unit
8 Grouting: consilidation /curtaingrouting in drilled holes by stagegrouting method under preassure asdirected, with cement slurry including cost of all materials, machinery,labour, redrilling if necessary etc.,with all lead and lifts (R.A-9) MT 483 12470.0 60.23
9 Conducting water loss tests in hardstrata using necessary packers instages of 8.00m at three desiredpressure ranges including saturationfor not less then 24hours and cost ofall materials,machinery, labour,water charges etc., complete withall lead and lifts(R.A-23) Each 500 2105.00 10.53
10 Providing, Fabricating, transportingto the site, hoisting and erectingstructural steel member fabricatedfrom rolled steel sections likechannels, angles, flats, I-sections,plates, rails etc., as per drawingincluding cost of all materials,machinery, labour, operations suchas cutting, bending, grinding,welding etc., and providing one coatof zinc chromate red oxide primerafter scrapping and cleaning thesurface, scaffolding etc., completewith all lead and lifts including costof steel (R.A-8) MT 368 76228.35 280.52
11 Providing drainage tunnel sumpchamber and other drainagearrangements Rmt 1800 1000 18.00
12 Water supply and sanitory arrangments LS 10.00
13 Dewatering charges LS 88.0014 contingencies @ 3% 134.2515 Work chrged establishment @2%
and rounding off 89.58
Total Rs. ` 4699.00[ Rupees four thousand six hundred ninety nine Lakhs Only ]
1 Preliminaries such as Surveys and setting out etc., LS 2.00Excavation for seating the dam, tailchannel, spill way, intake structureand appurtenant works includingplacing neatly or disposing off theexcavated stuff as directed etc., withall lead and lifts (R.A-11)i) all kinds of soil cum 2870 80.00 2.30ii) soft rock requiring blasting cum 431 128.00 0.55iii) hard rock cum 1005 193.00 1.94
3 Excavation for tunnel by tunnelingmethods including excavation forsupports in all types of soil/rockstrata requiring supports includingshoring, strutting and cost of allmaterials, machinery, labour, scalingexcavated surface, ventilition,lighting, drainage, removing andhauling excavated muck outsidetunnel upto specified dump area andall other ancillary operations etc.,complete with all lead and lifts (R.A-18) cum 25369 1880.00 476.94
4 Providing and fixing 25mm dia steelrock bolts with machanical/wedgetype anchorage including drilling35mm dia holes, providing 15 cmlong 20mm thick steel tapered wedge, 10mm thick 20cm*20 cm platewasher and nuts, tightening bolt bytorque wrinch, cost of all materials,machinery, labour, ventilition,lighting, drainage and all otherancillary operations etc., completewith all lead and lifts (R.A-19) RMT 11760 1065.00 125.24
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - b3 -Intermediate Adit to Tail Race Tunnel
2
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs.
In lakhs
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs.
In lakhs5 Providing and laying insitu vibrated
cement concrete M-20 usingapproved, clean, hard gradedaggregates including cost of allmaterials, machinery,labour,formwork, centring, scaffolding, cleaning,batching, mixing, placing in position ,levelling , vibrating, finishing, curingetc., complete with all lead and lifts,using 40mm and down courseaggregates and 28 days cubecompressive strength not less than20N/sqmm(200 kg/sqcm) cementcontent=320 Kg/cum (R.A-10) b)Adit, intakte, lift shaft shaft & simile cum 2767 6120.90 169.37
6 Providing , Fabrication and placing inposition reinforcement steel for RCCworks including cleaning,strightening, cutting, bending,hooking, lapping, welding whereverrequired, binding with 1.25mmdiameter soft annealed steel wire,including cost of all materials, labour,machinery, (including cost ofreinforcement and includingwastage) etc.,m complete with alllead and lifts. (R.A-5) MT 129 56622.50 73.04
7(a)
Drilling 32 mm to 35mm diametergrout holes in concrete/rockbypercusion drilling using jack hammeror stooper drills as directed tospecified depth for consolidation/contact grouting including of all costof all materials, machinery, labour,redrilling where ever necessary,ventilition, lighting, drainage and allother ancillary operations etc.,complete with all lead and lifts (R.A-21) RMT 1296 296.00 3.84
7(b)
Flushing grout holes of all sizesalternatively with water and air jetsfor an averageperiod of 30 minutesincluding water intake observations,cost of all materials, machinery,labout etc., complete (R.A - 54) RMT 1296 77.20 1.00
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs.
In lakhs8 Grouting: consilidation /curtain
grouting in drilled holes by stagegrouting method under preassure asdirected, with cement slurry includingcost of all materials, machinery,labour, redrilling if necessary etc.,with all lead and lifts (R.A-9) MT 91 12470.0 11.35
9 Conducting water loss tests in hardstrata using necessary packers instages of 8.00m at three desiredpressure ranges including saturationfor not less then 24hours and cost ofall materials,machinery, labour, watercharges etc., complete with all leadand lifts(R.A-23) Each 20 2105.00 0.42
10 Providing, Fabricating, transportingto the site, hoisting and erectingstructural steel member fabricatedfrom rolled steel sections likechannels, angles, flats, I-sections,plates, rails etc., as per drawingincluding cost of all materials,machinery, labour, operations suchas cutting, bending, grinding, weldingetc., and providing one coat of zincchromate red oxide primer afterscrapping and cleaning the surface,scaffolding etc., complete with alllead and lifts including cost of steel(R.A-8) MT 91 76228.35 69.37
11 Providing drainage tunnel sumpchamber and other drainagearrangements Rmt 930 1000 9.30
Total Rs. ` 1014.00[ Rupees one thousand fourteen Lakhs Only ]
1 Preliminaries such as Surveys, setting out etc., LS 5.00
2 Excavation for seating the dam, tailchannel, spill way, intake structure andappurtenant works including placingneatly or disposing off the excavatedstuff as directed etc., with all lead andlifts (R.A-11)I) all kinds of soil Cum 2200.00 80.00 1.76ii) soft rock cum 4400.00 128.00 5.63iii) Hard rock cum 4400.00 193.00 8.49
3 Providing and laying insitu vibratedcement concrete M-15 usingapproved, clean, hard gradedaggregates including cost of allmaterials, machinery,labour,form work, centring, scaffolding, cleaning,batching, mixing, placing in position ,levelling , vibrating, finishing, curingetc., complete with all lead and lifts,using 40mm and down courseaggregates and 28 days cubecompressive strength not less than15N/sqmm(150 kg/sqcm) cementcontent=270 Kg/cum;Cantilever/counterfort retaining walls,skin walls and similar works. (R.A - 37) Cum 240.00 6310.05 15.14
4 Providing and fixing 25mm dia steelrock bolts with machanical/wedge typeanchorage including drilling 35mm diaholes, providing 15 cm long 20mmthick steel tapered wedge , 10mmthick 20cm*20 cm plate washer andnuts, tightening bolt by torque wrinch,cost of all materials, machinery,labour, ventilition, lighting, drainageand all other ancillary operations etc.,complete with all lead and lifts (R.A-19) Rmt 280.00 1065.00 2.98
Amount Rs. In lakhs
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - c -TAIL RACE CHANNEL WORKS
Sl.No. Description of works Unit Qnty Rate in Rs.
Amount Rs. In lakhs
Sl.No. Description of works Unit Qnty Rate in Rs.
5(a)
Drilling 32 mm to 35mm diametergrout holes in concrete/rockbypercusion drilling using jack hammeror stooper drills as directed tospecified depth for consolidation/contact grouting including of all cost ofall materials, machinery, labour,redrilling where ever necessary,ventilition, lighting, drainage and allother ancillary operations etc.,complete with all lead and lifts (R.A-21) Rmt 280.00 296.00 0.83
5(b)
Flushing grout holes of all sizesalternatively with water and air jets foran averageperiod of 30 minutesincluding water intake observations,cost of all materials, machinery, laboutetc., complete (R.A - 54) Rmt 280.00 77.20 0.22
6 Grouting: consilidation /curtaingrouting in drilled holes by stagegrouting method under preassure asdirected, with cement slurry includingcost of all materials, machinery,labour, redrilling if necessary etc., withall lead and lifts (R.A-9) MT 20.00 12470.00 2.49
7 Providing , Fabrication and placing inposition reinforcement steel for RCCworks including cleaning, strightening,cutting, bending, hooking, lapping,welding wherever required, bindingwith 1.25mm diameter soft annealedsteel wire, including cost of allmaterials, labour, machinery,(including cost of reinforcement andincluding wastage) etc.,m completewith all lead and lifts. (R.A-5) MT 22.00 56622.50 12.46
8 Stone pitching providing andconstructing 45 cm thick rough stonepitching aver 15 cm thick 40 mm sizeaggregate backing including cost of allmaterials, machinery, labour etc.,complete with all lead and lifts (R.A-12) Sqm 1800.00 994.95 17.91
9 Dewatering charges LS 2.0010 Contingencies at 3 % 2.2511 Work charge Establishment at 2 %
and rounding off. 1.83Total Rs. ` 79.00
[ Rupees seventy nine Lakhs Only ]
1 Preliminaries LS 4.002 Excavation for tunnel by tunneling
methods including excavation forsupports in all types of soil/rock stratarequiring supports including shoring,strutting and cost of all materials,machinery, labour, scaling excavatedsurface, ventilition, lighting, drainage,removing and hauling excavatedmuck outside tunnel upto specifieddump area and all other ancillaryoperations etc., complete with all leadand lifts (R.A-18)
cum 15057.00 1880 283.073 Providing and fixing 25mm dia steel
rock bolts with machanical/wedgetype anchorage including drilling35mm dia holes, providing 15 cm long20mm thick steel tapered wedge ,10mm thick 20cm*20 cm platewasher and nuts, tightening bolt bytorque wrinch, cost of all materials,machinery, labour, ventilition, lighting,drainage and all other ancillaryoperations etc., complete with all leadand lifts (R.A-19)
to the site, hoisting and erectingstructural steel member fabricatedfrom rolled steel sections likechannels, angles, flats, I-sections,plates, rails etc., as per drawingincluding cost of all materials,machinery, labour, operations suchas cutting, bending, grinding, weldingetc., and providing one coat of zincchromate red oxide primer afterscrapping and cleaning the surface,scaffolding etc., complete with all leadand lifts including cost of steel (R.A-8)
MT 62.00 76228.35 47.26
Unit Qty Rate in Rs. Amount Rs in lakhs
Sl. No. Description Of Works
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - e - Civil Works of Penstock
Unit Qty Rate in Rs. Amount Rs in lakhs
Sl. No. Description Of Works
5 Providing and laying insitu vibratedcement concrete M-25 usingapproved, clean, hard gradedaggregates including cost of allmaterials, machinery,labour,formwork, centring, scaffolding, cleaning,batching, mixing, placing in position ,levelling , vibrating, finishing, curingetc., complete with all lead and lifts,using 40mm and down courseaggregates and 28 days cubecompressive strength not less than25N/sqmm(250 kg/sqcm) cementcontent=380 Kg/cum (R.A-20) cum 4214.00 6299.80 265.47
6 Providing , Fabrication and placing inposition reinforcement steel for RCCworks including cleaning, strightening,cutting, bending, hooking, lapping,welding wherever required, bindingwith 1.25mm diameter soft annealedsteel wire, including cost of allmaterials, labour, machinery,(including cost of reinforcement andincluding wastage) etc.,m completewith all lead and lifts. (R.A-5) t 277.00 56622.50 156.84
7(a)
Drilling 32 mm to 35mm diametergrout holes in concrete/rockbypercusion drilling using jack hammeror stooper drills as directed tospecified depth for consolidation/contact grouting including of all costof all materials, machinery, labour,redrilling where ever necessary,ventilition, lighting, drainage and allother ancillary operations etc.,complete with all lead and lifts (R.A-21) Rmt 1090.00 296 3.23
7(b)
Flushing grout holes of all sizesalternatively with water and air jets foran averageperiod of 30 minutesincluding water intake observations,cost of all materials, machinery,labout etc., complete (R.A - 54) Rmt 1090.00 77 0.84
Unit Qty Rate in Rs. Amount Rs in lakhs
Sl. No. Description Of Works
8 Grouting: consilidation /curtaingrouting in drilled holes by stagegrouting method under preassure asdirected, with cement slurry includingcost of all materials, machinery,labour, redrilling if necessary etc.,with all lead and lifts (R.A-9)
MT 78.00 12470.00 9.739 Removing and hauling overfallen
muck due to natural causes such asgeological faults etc., out of tunnelincluding breaking any largefragments by blasting if necessaryand disposing off the same inspecified dump area or as directedincluding cost of allmaterials,machinery, labour,ventilition, drianage,lighting and allother ancillary operations etc.,complete with all lead and lifts.(R.A-22) cum 753.00 392.00 2.95
10 Conducting water loss tests in hardstrata using necessary packers instages of 8.00m at three desiredpressure ranges including saturationfor not less then 24hours and cost ofall materials,machinery, labour, watercharges etc., complete with all leadand lifts(R.A-23)
Each 4 2105.00 0.0811 Dewatering charges LS 16.0012 Contingencies @ 3% 24.03
13 Work charged Establishment at 2 %and rounding off. 15.88
Total Rs. ` 841.00[ Rupees eight hundred fourty one Lakhs Only ]
Amt in Rs. LakhsSl No
Particulars Unit Qty. Rate Amount1 Supply, Fabrication, Erection of the following
grade of Boiler quality Steel plates includingsand blasting, painting and transportation (for Under ground Power House)a) Mild steel plates (ASTM A285 Grade C) MT 949 1.570 1489.80b) EHT steel plates (ASTM A517 Grade F) MT 813 2.549 2071.90
3 Contigencies @ 3% and round off 107.30
TOTAL ` 3669.00
[ Rupees three thousand six hundred sixty nine Lakhs Only ]
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
J - e2 - COST OF STEEL FOR PENSTOCKS
1 Preliminaries such as Surveyssettingout etc., LS 5.00
2 Excavation for tunnel by tunnelingmethods including excavation forsupports in all types of soil/rock stratarequiring supports including shoring,strutting and cost of all materials,machinery, labour, scaling excavatedsurface, ventilition, lighting, drainage,removing and hauling excavated muckoutside tunnel upto specified dump areaand all other ancillary operations etc.,complete with all lead and lifts (R.A-18)
cum 75081 1880.00 1411.523 Providing and fixing 25mm dia steel rock
bolts with machanical/wedge typeanchorage including drilling 35mm diaholes, providing 15 cm long 20mm thicksteel tapered wedge , 10mm thick20cm*20 cm plate washer and nuts,tightening bolt by torque wrinch, cost ofall materials, machinery, labour,ventilition, lighting, drainage and all otherancillary operations etc., complete with alllead and lifts (R.A-19) RMT 22810 1065 242.93
4 Providing and laying insitu vibratedcement concrete M-25 using approved,clean, hard graded aggregates includingcost of all materials,machinery,labour,form work, centring,scaffolding, cleaning, batching, mixing,placing in position , levelling , vibrating,finishing, curing etc., complete with alllead and lifts, using 40mm and downcourse aggregates and 28 days cubecompressive strength not less than250N/sqmm(250 kg/sqcm) cementcontent=380 Kg/cum (R A 4)g)Tie beams, slabs,lintels etc., cum 3276.56 7494.80 245.57h)Machine hall substructures (I stage) including forming galleries, adits, openings sumps hatches etc cum 11942 55 8839 80 1055 70
Undrerground power house. Machine hall. Repair bay, Control room .
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - f 1 - POWER HOUSE COMPLEX
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs5 Providing , Fabrication and placing in
position reinforcement steel for RCCworks including cleaning, strightening,cutting, bending, hooking, lapping,welding wherever required, binding with1.25mm diameter soft annealed steelwire, including cost of all materials,labour, machinery, (including cost ofreinforcement and including wastage)etc.,m complete with all lead and lifts.(R.A-5) MT 760 56622.50 430.33
6(a)
Drilling 32 mm to 35mm diameter groutholes in concrete/rockby percusiondrilling using jack hammer or stooperdrills as directed to specified depth forconsolidation /contact grouting includingof all cost of all materials, machinery,labour, redrilling where ever necessary,ventilition, lighting, drainage and all otherancillary operations etc., complete with alllead and lifts (R.A-21)
RMT 4272 296.00 12.656
(b)Flushing grout holes of all sizesalternatively with water and air jets for anaverageperiod of 30 minutes includingwater intake observations, cost of allmaterials, machinery, labout etc.,complete (R.A - 54) RMT 4272 77.20 3.30
7 Grouting: consilidation /curtaingrouting in drilled holes by stage groutingmethod under preassure as directed, withcement slurry including cost of allmaterials, machinery, labour, redrilling ifnecessary etc., with all lead and lifts (R.A-9) MT 300 12470.00 37.41
8 Conducting water loss tests in hard stratausing necessary packers in stages of8.00m at three desired pressure rangesincluding saturation for not less then24hours and cost of allmaterials,machinery, labour, watercharges etc., complete with all lead andlifts(R.A-23) Each 200 2105 4.21
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs9 Providing, Fabricating, transporting to
the site, hoisting and erecting structuralsteel member fabricated from rolled steelsections like channels, angles, flats, I-sections, plates, rails etc., as per drawingincluding cost of all materials, machinery,labour, operations such as cutting,bending, grinding, welding etc., andproviding one coat of zinc chromate redoxide primer after scrapping and cleaningthe surface, scaffolding etc., completewith all lead and lifts including cost ofsteel (R.A-8)
MT 95 76228.4 72.4210 Providing and fixing 25*25*2 cm gray
mosaic tiles of approved quality forflooring set over a bed of 1.5 to 2.0 cmthick CM 1:3 proporation includingpointing, machine polish three times,including wax polishing , curingetc.,complete with all lead and lifts (R.A-24) Sqm 1584 560.70 8.88
11 Providing 4 cm thick granolithic flooringwith/without adding ironite compound inCC 1:1.2 proporation using 12.5 mmdown size approved clean, hard,aggregates laid in alternate panals ofspecified size including mixing, laying,tamping, finishing to proper slope, curingetc., complete with all lead andlifts(excluding cost of ironite compound)(R.A-25)
Sqm 1895 389.95 7.3912 Providing guniting in cement mortar
including cost of all materials, machinery,labour, scaffolding, mixing, laying,finishing,curing etc., complete with alllead and lifts. 25mm thick using cementmortar 1:3 proportion by weight. (R.A-26)
15 Water supply and sanitory arrangments LS 8.0016 Dewatering charges LS 72.00
Providing fixing 7X8M electrically and mechanically operated steel doors 2 Nos
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs17 contingencies @ 3% 110.18
18 Work chrged establishment @2%and rounding off 73.27
Total Rs. ` 3856.00
[ Rupees three thousand eight hundred fifty six Lakhs Only ]
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs
1 Prelimaniries such as surveys, settingout etc., LS 3.00
2 Excavation for tunnel by tunneling methodsincluding excavation for supports in all typesof soil/rock strata requiring supportsincluding shoring, strutting and cost of allmaterials, machinery, labour, scalingexcavated surface, ventilition, lighting,drainage, removing and hauling excavatedmuck outside tunnel upto specified dumparea and all other ancillary operations etc.,complete with all lead and lifts (R.A-18) cum 21405 1880.00 402.42
3 Providing and fixing 25mm dia steel rockbolts with machanical/wedge typeanchorage including drilling 35mm diaholes, providing 15 cm long 20mm thicksteel tapered wedge , 10mm thick 20cm*20cm plate washer and nuts, tightening bolt bytorque wrinch, cost of all materials,machinery, labour, ventilition, lighting,drainage and all other ancillary operationsetc., complete with all lead and lifts (R.A-19) Rm 9168 1065.00 97.64Providing and laying insitu vibrated cement concrete M-25 using approved, clean, hard graded aggregates including cost of all materials, machinery,labour,form work, centring, scaffolding, cleaning, batching, mixing, placing in position , levelling , vibrating, finishing, curing etc., complete with all lead and lifts, using 40mm and down course aggregates and 28 days cube compressive strength not less than 250N/sqmm(250 kg/sqcm) cement content=380 Kg/cum (R.A-4)g)Tie beams, slabs,lintels etc., cum 804 8839.80 71.07
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-2014-15
J - f 2- POWER HOUSE COMPLEXTRANSFORMER HALL, OIL CHAMBER
4
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs in
lakhs.
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs in
lakhs.5 Providing , Fabrication and placing in
position reinforcement steel for RCC worksincluding cleaning, strightening, cutting,bending, hooking, lapping, weldingwherever required, binding with 1.25mmdiameter soft annealed steel wire, includingcost of all materials, labour, machinery,(including cost of reinforcement andincluding wastage) etc.,m complete with alllead and lifts. (R.A-5) t 96 56622.50 54.36
6(a)
Drilling 32 mm to 35mm diameter grout
holes in concrete/rockby percusion drilling
using jack hammer or stooper drills as
directed to specified depth for consolidation
/contact grouting including of all cost of all
materials, machinery, labour, redrilling
where ever necessary, ventilition, lighting,
drainage and all other ancillary operations
etc., complete with all lead and lifts (R.A-21) Rm 1880 296.00 5.566
(b)Flushing grout holes of all sizes alternativelywith water and air jets for an averageperiodof 30 minutes including water intakeobservations, cost of all materials,machinery, labout etc., complete (R.A - 54) Rm 1880 77.20 1.45
7 Grouting: consilidation /curtaingrouting in drilled holes by stage groutingmethod under preassure as directed, withcement slurry including cost of all materials,machinery, labour, redrilling if necessaryetc., with all lead and lifts (R.A-9) t 132 12470.00 16.46
8 Conducting water loss tests in hard stratausing necessary packers in stages of 8.00mat three desired pressure ranges includingsaturation for not less then 24hours andcost of all materials,machinery, labour,water charges etc., complete with all leadand lifts(R.A-23) Each 100 2105.00 2.11
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs in
lakhs.9 Providing, Fabricating, transporting to the
site, hoisting and erecting structural steelmember fabricated from rolled steelsections like channels, angles, flats, I-sections, plates, rails etc., as per drawingincluding cost of all materials, machinery,labour, operations such as cutting, bending,grinding, welding etc., and providing onecoat of zinc chromate red oxide primer afterscrapping and cleaning the surface,scaffolding etc., complete with all lead andlifts including cost of steel (R.A-8) t 27 76228.35 20.58
10 Providing 4 cm thick granolithic flooring with/without adding ironite compound in CC 1:1.2 proporation using 12.5 mm down size approved clean, hard, aggregates laid in alternate panals of specified size including mixing, laying, tamping, finishing to proper slope, curing etc., complete with all lead and lifts(excluding cost of ironite compound) (R.A-25) Sqm 1326 389.95 5.17
11 Providing guniting in cement mortarincluding cost of all materials, machinery,labour, scaffolding, mixing, laying,finishing,curing etc., complete with all leadand lifts. 25mm thick using cement mortar1:3 proportion by weight. (R.A-26) Sqm 2280 657.20 14.98
12 Flushing of grout holes of all sizesalternatively with water and air jet for anaverage period of 30 minutes includingwater intake observation, cost of allmaterials,machinery, labour, etc., completewith all lead and lifts (R.A-28) No. 235 91.00 0.21
13 Providing drainage tunnel sump chamber and other drainage arrangements LS 15.00
14 Water supply and sanitory arrangments LS 10.0015 Dewatering charges 15.0015 contingencies @ 3% 22.0516 Work charge establishment @2% and
rounding off. 14.93Total Rs. ` 772.00
[ Rupees seven hundred seventy two Lakhs Only ]
1 Preliminaries such as Surveys,setting out etc., 5.00
2 Excavation for tunnel by tunnelingmethods including excavation forsupports in all types of soil/rock stratarequiring supports including shoring,strutting and cost of all materials,machinery, labour, scaling excavatedsurface, ventilition, lighting, drainage,removing and hauling excavated muckoutside tunnel upto specified dump areaand all other ancillary operations etc.,complete with all lead and lifts (R.A-18) cum 33312 1880.00 626.26
3 Providing and fixing 25mm dia steel rockbolts with machanical/wedge typeanchorage including drilling 35mm diaholes, providing 15 cm long 20mm thicksteel tapered wedge , 10mm thick20cm*20 cm plate washer and nuts,tightening bolt by torque wrinch, cost ofall materials, machinery, labour,ventilition, lighting, drainage and allother ancillary operations etc., completewith all lead and lifts (R.A-19) RMT 8520 1065.00 90.74
4 Providing and laying insitu vibratedcement concrete M-25 using approved,clean, hard graded aggregates includingcost of all materials,machinery,labour,form work, centring,scaffolding, cleaning, batching, mixing,placing in position , levelling , vibrating,finishing, curing etc., complete with alllead and lifts, using 40mm and downcourse aggregates and 28 days cubecompressive strength not less than250N/sqmm(250 kg/sqcm) cementcontent=380 Kg/cum (R.A-4)
4 g)Tie beams, slabs,lintels etc., cum 2693 8839.80 238.06
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
J - f 3 - POWER HOUSE COMPLEX TAIL RACE COLLECTION CHAMBER
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs5 Providing , Fabrication and placing in
position reinforcement steel for RCCworks including cleaning, strightening,cutting, bending, hooking, lapping,welding wherever required, binding with1.25mm diameter soft annealed steelwire, including cost of all materials,labour, machinery, (including cost ofreinforcement and including wastage)etc.,m complete with all lead and lifts.(R.A-5) MT 323 56622.50 182.89
6(a)
Drilling 32 mm to 35mm diameter groutholes in concrete/rockby percusiondrilling using jack hammer or stooperdrills as directed to specified depth forconsolidation /contact grouting includingof all cost of all materials, machinery,labour, redrilling where ever necessary,ventilition, lighting, drainage and allother ancillary operations etc., completewith all lead and lifts (R.A-21) RMT 1808 296.00 5.35
6(b)
Flushing grout holes of all sizesalternatively with water and air jets foran averageperiod of 30 minutesincluding water intake observations, costof all materials, machinery, labout etc.,complete (R.A - 54) RMT 1808 77.20 1.40
7 Grouting: consilidation /curtaingrouting in drilled holes by stagegrouting method under preassure asdirected, with cement slurry includingcost of all materials, machinery, labour,redrilling if necessary etc., with all leadand lifts (R.A-9) MT 127 12470.0 15.84
8 Conducting water loss tests in hardstrata using necessary packers instages of 8.00m at three desiredpressure ranges including saturation fornot less then 24hours and cost of allmaterials,machinery, labour, watercharges etc., complete with all lead andlifts(R.A-23) Each 100 2105.00 2.11
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs9 Providing, Fabricating, transporting to
the site, hoisting and erecting structuralsteel member fabricated from rolledsteel sections like channels, angles,flats, I-sections, plates, rails etc., as perdrawing including cost of all materials,machinery, labour, operations such ascutting, bending, grinding, welding etc.,and providing one coat of zinc chromatered oxide primer after scrapping andcleaning the surface, scaffolding etc.,complete with all lead and lifts includingcost of steel (R.A-8) MT 967 76228.35 737.13
10 Providing and fixing 25*25*2 cm graymosaic tiles of approved quality forflooring set over a bed of 1.5 to 2.0 cmthick CM 1:3 proporation includingpointing, machine polish three times,including wax polishing , curingetc.,complete with all lead and lifts (R.A-24) SQM 450 560.70 2.52
11 Providing and painting with water proofcement paint (Mylac or equivalent) ofapproved colour including scraping thesurface, necessary scaffolding etc.,complete with all lead and lifts (R.A-27) SQM 3162 58.45 1.85
12 Providing guniting in cement mortarincluding cost of all materials,machinery, labour, scaffolding, mixing,laying, finishing,curing etc., completewith all lead and lifts. 25mm thick usingcement mortar 1:3 proportion by weight.(R.A-26) SQM 480 657.20 3.15
13 Providing drainage tunnel sumpchamber and other drainagearrangements LS 10.00
14 Water supply and sanitory arrangmentsLS 6.00
15 Providing and fixing RS joints at thebottom of gate groove etc., LS 6.00
16a Providing Gates for draft tube t 3 95000.00 2.85b Embedded Parts for gate t 4.5 76000.00 3.42c Hoisting arrangements Set 1 1500000 15.00
17 Providing hand Rails LS 5.0018 Dewatering charges LS 40.00
Sl. No. Description of works Unit Qnty Rate in Rs. Amount Rs. In
lakhs19 contingencies @ 3% 60.0220 Work charge establishment @2% and
rounding off 40.42Total Rs. ` 2101.00
[ Rupees two thousand one hundred one Lakhs Only ]
Sl. No. Item of work Unit Qty Rate in
Rs.Amount Rs.
In Lakhs
1 Preliminaries LS 4.002 Excavation for seating the dam, tail
channel, spill way, intake structureand appurtenant works includingplacing neatly or disposing off theexcavated stuff as directed etc., withI) all kinds of soils cum 17379 80.00 13.90 ii) Soft rock cum 8690 128.00 11.12iii) Hard rock cum 8690 193.00 16.77
3 Providing and constructing UCRmasonry with approved rubble stonesin CM including cost of materials,machinery, labour, scaffolding,ramps, cleaning, packing marter,wedging stone chips, curing etc.,complete with all lead and lifts (R.A-6) U C R masonary in CM 1:4 (per cum 224.00 4862.40 10.89
4 Providing & laying cement concrete,using 20 mm and down sizeapproved, clean,hard, gradedaggregates for RCC works laid inlayers not exceeding 15 cm thick andwell compacted/ vibrated includingmixing,curing, and necessarycentering,shuttering and formworkincluding finishing etc.,complete withinitial lead upto 50 m and initial liftupto 4m (excluding cost of steel andits fabrication.) M20 concrete (cementcontent 364 kg/cum)
a For Column footing for main andsecondry beams in foundation &Basement & strip footing infoundation (R.A - 51) cum 3132.00 5144.75 161.13
b For columns. (RA - 52a) cum 113.00 7367.75 8.33c For beams & Lintels. (RA - 52b) cum 168.00 7328.75 12.31d For slabs, staircases & canopies (RA - cum 106.00 6945.25 7.36e For chajja (RA - 52d) cum 2.00 7172.75 0.14
J - f4 -OUTDOOR YARD & Appurtenant Works
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering worksBased on KPCL SR-SR-2014-15
Sl. No. Item of work Unit Qty Rate in
Rs.Amount Rs.
In Lakhs5 Providing , Fabrication and placing in
position reinforcement steel for RCCworks including cleaning, strightening,cutting, bending, hooking, lapping,welding wherever required, bindingwith 1.25mm diameter soft annealedsteel wire, including cost of allmaterials, labour, machinery,(including cost of reinforcement andincluding wastage) etc.,m completewith all lead and lifts. (R.A-5) t 297.00 56622.50 168.17
6 Providing and constructing 20cm thickwalls using 40X20X20 cm sizecement concrete cavity (hollow)blocks manufactured from CC 1:5:3proportion with shell thickness of notless than 40mm and solid materialbetween 50% to 70% of volume , inC.M. 1:6 including necessaryscaffolding, curing etc.,complete withinitial lead upto 50m and initial liftupto 4m. (RA - 38) cum 85.00 880.15 0.75
7 Providing and fixing in positionanodised aluminium door/ partitionfully glazed using extruded sectionscut to length, joints mitred andcorners grinded, stiffened with cornerangle strips with all joints made waterproof including providing necessaryholes in the frame and concrete/masonry for fixing 5.5 mm thick plainglass with glazing clips and PVCbeading etc., complete with all leadsand initial lift upto 4m.
a Fixed portion using extruded frame
section having weight not less than
1.6 kg/m length and glazing clips
having weight not less than0.1kg/m
length (R.A -39) Sqm 105.00 5954.00 6.25
Sl. No. Item of work Unit Qty Rate in
Rs.Amount Rs.
In Lakhsb Door portion using extruded frame
sections having weight not less than1.6kg/m length and shutter sectionshaving weight not less than1.5 kg/mfor top section, 0.9 kg/m for middlesection, 2.1kg/m for bottom section ,2.0 kg/m for sides with the weight ofglazing clip not less than 0.1 kg/mincluding providing hinged or pivotedopening arrangement with steelbearings, approved quality aluminiumhandles, lever locks, chrome platedfloor type door latches for eachshutter, heavy duty double actionfloor springs etc.,complete with allleads and initial lift upto 4m. (R.A -40) Sqm 15.00 10049.00 1.51
8 Providing and fixing in positionanodised aluminium fully glazedwindows/ventilators using extrudedhollow section cut to length jointsmitred, corner grinded, stiffened withcorner angle strip with all joints madewater tight, including makingnecessary holes in the frame,concrete/masonry for fixing 4mmthick plain glass with glazing clips,handles, stoppers and PVC gasketetc.,completewith all leads and initial lift upto 4m.Sliding window (openable) two trackusing sections having weight in kg/mof Frame - Frame top & Side -0.45kg; Frame Bottom-0.58Kg;Shutter top & bottom - 0.51Kg;Shutter interlock - 0.52Kg; & Shutterside - 0.4Kg(R.A -41) Sqm 50.00 4251.00 2.13
9 Providing plastering to stone masonry/ BB masonry / laterite masonryincluding raking joints, smoothfinishing, curing, scaffolding etc.,complete with initial lead upto 50mand initial lift upto 4m ; 2.0cm thick inCM 1:4 propn (R.A -42) Sqm 416.50 190.10 0.79
upto 4m (R.A -44) Sqm 589.50 29.30 0.1712 Providing 1.2 cm thick plastering to
concrete surface in CM 1:3 includingscraping the surface, smoothfinishing, curing necessary scaffolding etc., complete with initial lead upto 50m and initial lift upto 4 m. Ceiling,bottom of chajja, lintel, beam andcolumn (R.A -45) Sqm 173.00 165.05 0.29
13 Providing and painting with distemper(Mylac or equivalent) includingscraping the surface, repairing thescratches, necessary scaffolding etc.,complete with all leads and initial liftupto 4m. Oil-bound distemper twocoats with one coat of primer (R.A -46) Sqm 589.50 39.85 0.23
14 Providing and painting with waterproof cement paint (Mylac orequivalent) of approved colourincluding scraping thesurface,necessary scaffolding etc.,complete with all leads and initial liftupto 4m - Two coats with One coat ofprimer (R.A -47) Sqm 416.50 58.45 0.24
Sl. No. Item of work Unit Qty Rate in
Rs.Amount Rs.
In Lakhs15 Providing and fixing false ceiling
consisting of ceiling boards ofapproved quality and 25 X 25 mmanodised aluminium angles fixed tothe walls by rawl plugs and screws,25 X 25 mm anodised aluminium teeswith aluminium clips in grid of 600 X600 mm hung from hooks provided inceiling by 14 gauge GI wire includingcost of all materials, labour, providingholes/ openings wherever required forfittings,fixing ceiling boards by screwsetc., complete with all leads and liftupto 4m. Using 8 mm thick cementbonded particle boards. (R.A -48) Sqm 80.00 1657.50 1.33
16 Providing and fixing MS hand railingto stairs,balconies and aroundopenings as per design using mildsteel flats, square or round bars with50 mm diameter galvanised iron piperailings at the top including two coatsof synthetic enamel paint of approvedquality over a coat of zinc chromatered oxide primer, scaffolding etc.,complete with all leads and lifts. Note:The total weight of mild steel flats,square or round bars shall not be lessthan 12.10kgs/sqm. (R.A -49) Sqm 48.00 1750.00 0.84
17 Providing painting to metal surfaceswith synthetic enamel paint(1stquality) of approved colour includingcleaning the surface, repair of primercoat, cost of all materials, labour,scaffolding etc., complete with allleads & lifts. Base coat with oneadditional coat of paint (R.A -50) Sqm 48.00 121.30 0.06
18 Supply of approved clean, hard,single, size metal of size 40mmincluding stacking in standard heapsand spreading/levelling the same inoutdoor yard, substation etc.,complete with initial lead upto 1 kmand all lifts.(R.A -53) cum 540.00 1644.20 8.88
Sl. No. Item of work Unit Qty Rate in
Rs.Amount Rs.
In Lakhs19 Stone pitching providing and
constructing 45 cm thick rough stonepitching aver 15 cm thick 40 mm sizeaggregate backing including cost ofall materials, machinery, labour etc.,complete with all lead and lifts (R.A-12) Sqm 1665.00 994.95 16.57
20 Back filling the excavated trench onthe D/S of dam in layers usingavilable free draining material,including cost of all materials,machinery, labour, tamping etc.,complete with all lead & lifts (R.A-14) cum 10427.40 247 25.70
21 Electification of ODY (10% of total Amount) L.S 48.046811
22 Sanitry & Water supply to ODY (8% of Total amount) L.S 38.4374488
23 Contingencies @ 3% 17.01
24 Work charged estblishment @ 2% and rounding off. 11.04
Total Rs. ` 595.00
[ Rupees Five hundred ninety Five Lakhs Only ]
Sl Description of Works. Unit Qty Rate Amount RsNo in Lakhs1 Transport vechile maintenance and
running charges ofa) 4 Wheel drive Jeeps Diesel Engine Fitted No's 4 80000 3.2015 No's Jeeps for Five years (four Wheel) (Rs.30,000/- per vehicle per month on hire basis) No's 15 6000 54.00b) Heavy duty Trucks No's 0 500000 0.00c) Omni Bus for staff No's 0 440000 0.00
2 Power supply to the Worksites, colonyetc., LS 2.00
3 Field Laboratorya) Equipments LS 5.00b) Maintenance LS 2.00
4 Photographya) Photographic equipments such as Cameras, Projectors etc., LS 1.00b) Running cost LS 1.00
5 Tele communications a) Installation charges ( P & T phones) LS 2.00 b) Running and Maintenance charges LS 1.00 c) Installation of Internal Telephones LS 1.00d) Maintenance cost of internal Telephon LS 0.50
6 Art Gallery LS 2.00
a) Preparation and exhibition of Models LS 1.007 Medical Aid
a) Equipments for Hospital / Dispensarie LS 1.00b) Running and Maintenance charges LS 2.00
8 Health Sanitation Anti Malaria Measures.a) Purchase of Equipments and machina LS 1.00b)Maintenance cost LS 1.00
9 Educational Facilitiesa) Purchase of library books and furniture LS 1.00b) Running cost LS 0.50
10 Entertainments a) Entertainnment for Guest and Visitors LS 0.50 b) Printing Technical Literature and Publicity LS 1.00
11 a) Labour wekfare and adult education LS 1.00
O-MISCELLANEOUS
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering works
Sl Description of Works. Unit Qty Rate Amount RsNo in Lakhs
O-MISCELLANEOUS
b) Amenities to Employees LS 2.00
12Power Supply to Colonies, Work sites etc LS 1.00
13 Workmens Compensation 5.0014 Recreation Centres. LS 1.0015 Security Arrangements.
a) Security Police, and staff. LS 2.00b) Fire fighting services LS 1.00
16 a)Foundation Laying ceremonies and project inaugaration LS 1.00b) Furnituer to circuit house LS 1.00c) Award to workers LS 1.00
17 Erection of memorial tableaus LS 1.00
18Illumination to Weir site and intake structure & Miscellaneous LS 1.00
19Demolition of existing old & disintigrated structures LS 2.00
20 Water treatment plant LS 3.00
21Overhead tank of 4 lakhs capacity with raising main & delivery lines. LS 2.00
22Sewage treatment plsnt (Aerobic) of 400KLD capacity LS 1.30
Total Rs. ` 110.00
[ Rupees one hundred ten Lakhs Only ]
Sl Description of Works. Unit QtyNo1 Improvement to existing road from Hosakkur
to Kakkur -3 Kms (sand quarry) Km 3.00 5.00 15.00
2 Formation of new roads / improvement to existing rodsa) Road from New Tippu bridge ro PH Km 3.06 5.00 15.30b) Road from PH to Right bank of weir over intake structure Km 1.00 5.00 5.00
c) Road from PH to TRT end Km 6.84 5.00 34.20d) Road to Arroach adit to TRT (Portal) Km 1.84 5.00 9.20e) Road to Approach tunnel (Portal) Km 1.16 5.00 5.80f) Road (New alignment) to Surface power house from TRT end Km 3.00 10.00 30.00
g) Road to magazine Building Km 1.00 5.00 5.00h) Road to Dump Yard Km 3.00 5.00 15.00i) Road to stone quarry Km 1.00 5.00 5.00j) Road to Store yard Km 1.00 5.00 5.00k) Road to Soil Quarry Km 1.00 5.00 5.00
3 Providing cross drainage works No's 12.00 1.00 12.004 Construction of Bridge across Muduki halla LS 100.005 Deposits to be made with National Highway
for strengthening of National highway & MDR road bridges
LS 90.00
4 Miscellaneous and rounding off 8.50Total Rs ` 360.00
[ Rupees three hundred sixty Lakhs Only ]
R-communication
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering works
Rate (Rs. In Lakhs)
Amount (Rs in Lakhs)
Sl Description of Works. Unit QtyNo1 Rehabilitation LS 20.002 Compensatory afforestation Ha 90.0 0.30 27.003 Disaster management plan LS 20.004 Restoration of land in construction areas by
filling, grading etc. to prevent further erosion LS 20.00
5 Control of aquatic weeds in submerged areas to provide improved habitat for aquatic life LS 20.00
6 Salvage/rehabilitation of any rare or endangered species of flora and fauna found in the affected areas
LS 20.00
7 Enforcement of anti poaching laws LS 10.008 Measures to prevent forest fires, over grazing of
areas etc LS 10.00
9 Establishment of fuel depots etc LS 5.0010 Public health measures LS 5.0011 Catchment Area Treatment LS 5.0012 Environmental and ecological studies LS 30.0012 Survey to access Net Present Value of forest
land Ha 90.00 0.10 9.00
Total Rs ` 201.00
[ Rupees two hundred one Lakhs Only ]
Karnataka Power Corporation LimitedShivasamudram Run Of The River Power Project
Estimate for civil engineering works
X- Environment and Ecology
Rate (Rs. In Lakhs)
Amount (Rs in Lakhs)
Annexure - 1 KPCL / SSPS-100MW
(Rs. Lakhs)S.No. Item Amount
1 Preliminary ( Annexure - 2 ) 0.00
2 Generating Plant and Equipmenta)Generator, turbine and accessories ( Annexure - 3 ) 20531.25b) Auxiliary electrical equipment for power station ( Annexure - 4 ) 1648.39c) Auxiliary equipment and services for power station ( Annexure - 5 ) 665.61d) Central Sales Tax @ 2% on 2(a), (b) & ( c )
3 a) Substation equipment and auxiliary equipment and service for Switchyard ( Annexure - 6A & 6B ) 1609.87b) Central Sales Tax @ 2 % on 3(a) 32.20c) Transportation,handling and insurance charges @6% on 3(a) 96.59d) Erection and commissioning charges @ 8% of 3(a) excl.spares
126.83
Total ( Substation equipment and auxiliary equipment and service of Switchyard) 1865.49
4 Contingencies @ 1% (Equipment cost only) 207.38
5 Tools & Plants @ 0.5 % of items 2 &3 103.69
6 Sub-Total of 1 to 6 28595.67
7 Establishment ( based on Manpower to be deployed limited to 6% Equipment cost only ) 1244.27
8 Sub-Total of 6 & 7 29839.94
9 Audit and Account charges @ 0.5% 149.20
10 Service tax @ 14.5 % on erection and commissioning 271.59
GRAND TOTAL 30260.73
Abstract of Hydraulic & Electrical Engineering works
2 x100MW GENERATING UNIT COUPLED VERTICAL KAPLAN TURBINE
KPCL / SSPS-100MW
% Amount1 2 3 4 5 6 7 8
1 Consultancy Charges / Studieas
0.00 0.00
2 Model Test
3 Construction Power
a) Diesel Generating Sets (125 KVA)
b) Substation
c) Transmission Line
d) Distribution Line
e) LT Switchgear, cable
Total 0.00 0.00
Item Particulars Qty Rate AmountExcise Duty
Total
( Included in civil works O - Miscellaneous )
( Included in 1(a) of annexure 3 )
Annexure - 2
Preliminary
Hydraulic & Electrical Engineering works
(Rs. lakhs)
Sl No
KPCL / SSPS-100MW
% Amount1 2 3 4 5 6 7 8
1 (a) Generating units 100 MW, 250rpm, 172.53m head, Vertical shaft, Francis Turbine, 125 MVA, Generator (AC), 11 kV, 0.9 p.f, Equipment complete with Governor with oil pressure system, Lubricating oil system, suitable bearing system, Static excitation system, AVR, Auto sequencer, UCB, Main inlet valve, including Unit control panel,Model testing.
2x 100000
16400.00 12.50 2050.00 18450.00
b) Unit Control Boards c) Cooling Water System d) Drainage and Dewatering Systems e) Compressed Air System including pipes, valves etc., f) Surge Protection & Neutral earthing protection g) Oil for first filling for governor, bearing etc.,
3 Supervisory control and data acquisition system comprising Microprocessor based relays, control boards and panels, protective relays, annunciation, synchronising equipments, measuring, recording automation and protective system
LS 1000.00 12.50 125.00 1125.00
4 Line control panels,
relays, annunciation, energy metering & busbar protection
5 Butterfly valve along with associated equipments
Annexure - 3Hydraulic & Electrical Engineering works
Generator, Turbine and Accessories(Rs. lakhs)
Included in Sl. No.1a) above
Included in Sl. No.1(a) above
Sl No Item Particulars Total
Included in 3 above
Annexure - 4
KPCL / SSPS-100MW
(Rs. lakhs)
% Amount1 2 3 4 5 6 7 8
1 Step up Transformer including oil for first filling (Rating 125 MVA, 11 / 220KV, OFWF cooled, 3 phase )
2 450 900.00 12.50 112.50 1012.50
2 Unit Auxillary Transformer (Rating 2.5MVA, 11/0.415kV, 3 Phase )
2 1000 Rs. / kVA
50.00 12.50 6.25 56.25
3 Station Service Transformer (Rating 125 kVA, 11/.415 kV, 3 phase )
1 2.50 12.50 0.31 2.81
4 LT AC Switchgear for aux. power supply to power house and outdoor switchyard complete including 415 V Distribution Board for auxiliary power supply
LS 80.00 12.50 10.00 90.00
5 2 sets of Batteries, Battery charging equipment, DC Distribution Board with D.C. Switchgear for Power House ( Rating 1100 AH, 220 V)
LS 100.00 12.50 12.50 112.50
6 415 V LT Distribution Board for auxiliary power supply at Power house
7 Diesel generating set (Rating 625KVA)
1 25.00 25.00 12.50 3.13 28.13
8 Control & Power cables (excluding XLPE cables) a) Control cables with accessories b) 11 kV Power cables complete with clamps etc., c) 415 V Power cables complete with clamps, cleats etc.,
LS 100.00 12.50 12.50 112.50
9 Cable racks and accessories LS 40.00 12.50 5.00 45.0010 Ground mat and internal earthing
for P.H & SwitchyardLS 40.00 12.50 5.00 45.00
11 Illumination of Weir, Power House & Switch yard
LS 50.00 12.50 6.25 56.25
12 Electrical Test Laboratory LS 40.00 12.50 5.00 45.00
Sub-Total (items 1 to 8 ) 1257.50
13 Spares for items 1 to 8 @ 3% 37.73 12.50 4.72 42.45
Total 1465.23 183.16 1648.39
Total
AUXILIARY ELECTRICAL EQUIPMENT FOR POWER STATION
Hydraulic & Electrical Engineering works
Included in 4 above
Excise Duty Sl No Item Particulars Qty Rate Amount
KPCL / SSPS-100MW
(Rs. lakhs)
% Amount
1 2 3 4 5 6 7 8
1 Electrical Over head travelling crane for Power House (Capacity 150T/ 50T/ 10T )
2 200.00 400.00 12.50 50.00 450.00
2 Electric lifts 2 10.00 20.00 12.50 2.50 22.50
3 Fire fighting equipment LS 45.00 12.50 5.63 50.63with storage tanks,strainers, pipes,pumps, valves andHVWS, hydrant &portable fireextinguishers
4 Air conditioning, LS 70.00 12.50 8.75 78.75ventilation and heatingequipments
5 Filtered water supplyfor power house
6 Oil handling LS 20.00 12.50 2.50 22.50equipment with pipes,valves, tanks, purifiers
Sub-Total (Items 1 to 6) 555.00 69.38 624.38
7 Workshop machines LS 20.00 12.50 2.50 22.50and equipment
8 Spares for item No. 1 to 16.65 12.50 2.08 18.736 above @ 3% Total 591.65 73.96 665.61
Total
AUXILIARY EQUIPMENT AND SERVICES FOR POWER STATION
Annexure - 5
Included in civil scope of supply
Sl No Item Particulars Qty Rate Amount
Excise Duty
KPCL / SSPS-100MW
(Rs. lakhs)
% Amount1 2 3 4 5 6 7 8
1 Station StructuresSteel structure at terminal end
LS 191.25 12.50 23.91 215.16
Sub-Total Item - 1 191.25 23.91 215.16
2 DC Battery Charger & DC Distribution Board in the Switchyard
3 Fire Protection System for 400 kV Switchyard
4 Telecommunication equipments
a) PLCC equipment with express facility, teleprinter, telecontrol
b) Local & internal communication including telephone lines LS 40.00 12.50 5.00 45.00
c)Telemetering equipment
d) Load frequency control equipment
5 Fencing and security
Sub-Total ( 2 to 4) 40.00 12.50 5.00 45.00
6 Spares for items 2 to 5 @ 3%
1.2012.50
0.15 1.35
TOTAL 232.45 5.15 261.51
Qty Rate Amount Excise Duty
Included in Item No. 5 of Annexure - 4
Included in Item No. 3 of Annexure - 5
Total
Annexure - 6AHydraulic & Electrical Engineering works
Substation Equipments & Aux. equipment & Service For Switchyard
360.00 20.00 100.00 100.00 50.00 50.00 20.00 20.00 360.00S Power plant and Electro - Mechanical system
0.00
A) 3 x100MW Generating unit coupled Vertical Francis Turbine
0.00
1.Generating Plant and Equipment 0.00
a) Generator, turbine and accessories 20531.25 1026.56 2258.44 2258.44 3285.00 4516.88 3490.31 1642.50 2053.12 20531.25b) Auxiliary electrical equipment for power station
