DRAFT ENVIRONMENTAL DUE DILIGENCE REPORT...Environmental Due Diligence Report (EDR), including, in...

VOL. 3 REPUBLIC OF BULGARIA

MINISTRY OF REGIONAL DEVELOPMENT AND PUBLIC WORKS

MUNICIPAL INFRASTRUCTURE DEVELOPMENT

PROJECT

DRAFT ENVIRONMENTAL DUE DILIGENCE REPORT

NEIKOVTSI DAM

Sofia, October 2007

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Neikovtsi Dam Environmentul Due Diligence Report

TABLE OF CONTENTS

I . EXECURIVE SUMMARY P. 3

I I INTRODUCTION P- 4

111. PROJECT DESCRIPTION P- 6

IV. OPTION ANALYSIS P. 7

V. STATUS ANALYSIS, BASELINE DATA P. 9

VI. FORECAST OF EXPECTED ENVIRONMENTAL IMPACT OF

THE CONSTRUCTION OF NEIKOVTSI DAM p. 14

V1 I. LEGISLATIVE FRAMEWORK AND ORGANIZATIONAL

STRUCTURES FOR MANAGEMENT OF THE

ENVIRONMENT p. 25

V1 11. ENVIRONMENTAL IMPACT MITIGATION PLAN p. 25

IX. ENVIRONMENTAL MONITORlNG PLAN p. 27

X. PUBLIC CONSULTATION PROCEDURES p. 28

Neikovtsi Dam Environmmtul Due Diligence Report

I. EXECUTIVE SUMMARY

The Environmental Due Diligence Report for Neikovtsi Dam is part of the documents presented by the Ministry of Regional Development and Public Works (MRDPW) to the World Bank for financing of the construction of Neikovtsi Dam under the Municipal Infrastructure Development Project.

The Environmental Due Diligence Report contains the following main studies and conclusions:

Design support of Neikovtsi Dam

Technical detailed designs have been developed for Neikovtsi Dam, the related facilities and tor the Potable Water Purification Plant (PWPP). The construction was carried out by these des~gns till its suspension in 2001. The designs were made in conformity with the prevailing regulation of Bulgaria in order to guarantee the security - structural, technological and environmental - of the dam and the related facilities. Before commencement of the construction, an update of the dam and PWPP designs will be required.

An Environmental Impact Assessment (EIA) Report has not been developed for Neikovtsi Dam because construction started before 1991 when, with the Environmental Protection Act (EPA), the requirement for an Environmental Impact Assessment (EIA) was introduced. An EIA was developed for the Potable Water Purification Plant (PWPP) in 1999, however, the procedure required by EPA was not carried out and there is no decision on the part of the competent body, the Regional Inspectorate of Environment and Water (RIEW) of Veliko Tamovo.

Environment condition

The condition of the environment in the area of Neikovtsi Dam has been subjected to the impact of the construction works performed and is defined as anthropogenically affected. The dam construction is 30% complete; the facilities contiguous to the dam (intake tower, asphalt-concrete diaphragm, control and instrumentation (C&I) system) are partly completed. The water intake works are entirely completed, the quarry is opened and the dam construction site is prepared. 40% of the PWPP, 90% of the water main and 100% of the road construction work is completed. A humus depot has not been established, and the spillway with race (chute) and ski-jump has not been built.

The river ecosystem is negatively affected due to isolation of the zone of the prospective lake from the lower sectors of the river. The river sector upstream of the dam has gone almost dry dunng the summer low-water season and there is no ichtiofauna. Ichtiofauna appears only in the territory of Plachkovtsi. The herpetofauna is represented by species of high environmental status. The mammals and the omitofauna are less affected due to the fact that the dam area is inhabited by species distributed throughout the territory on the northem slopes of Central Stara Planina. The ligneous forest vegetation (6,O-7,O ha) was cleared at the start of construction during the eighties of last century, and then again in the end of the nineties. In the beginning of the construction work some ligneous offshoot vegetation that had developed dunng the years after the project suspension (10-15 to 25 years of age) will have to be cleared. The scarce humus layer was not stripped.

The suspension of construction of Neikovtsi Dam leaves unsolved a basic social problem supp ly of the towns Tryavna and Plachkovtsi, and part of the villages in their municipalities with quality water without water supply rationing.

Environmental impacts of the construction and operation of Neikovtsi Dam

A significant part of the negative environmental impacts attendant to the construction of Neikovtsi Dam are over due to: opening of the Suhodol quarry, ready construction site, already built service road network within 16 m of the dam and part of the adjoining facilities. Settling of the construction effluent is provided for without any risk of pollution of the river of Neikovska during the completion of Neikovtsi Dam.

Due to the progress made in the construction work, the environmental impacts from completion of Neikovtsi Dam will be limited and their mitigation and prevention are feasible.

Neikovtsi Dam Environmental Due Diligence Report

The main impacts of Neikovtsi Dam will result from operation of the hydro-engineering works. The river ecosystem is transformed into a reservoir ecosystem. 32,5 ha of ligneous forest vegetation will be permanently flooded. Immediately above the Neikovtsi residential area of the town Plachkovtsi there is a dam classified as "large", and its safe operation has to be assured.

At the same time, a sustainable ichtiocenosis will develop in the dam lake, the conditions in the lower sectors of the river of Neikovska downstream of the dam (up to the town Plachkovtsi) will stabilize, with mitigation of the negative impact of summer low water. The impact on the herpetofauna, mammals and omitofauna will be negligible. Normal good-quality water supply will be provided to the population. That is of great importance to the area of Tryavna Municipality with its flourishing summer and winter vacation business.

The possible alternatives at the design phase and at the present moment are reviewed herein.

The regulation acts and methodologies used in the Environmental Due Diligence Report are enclosed.

For the purpose of mitigation of the negative consequences from the construction operation of Neikovtsi Dam, an Environmental Impact Mitigation Plan and a Monitoring Plan are proposed.

The results of the public discussion of the Project in Tryavna and of the consultations with administrative and competent authorities are presented.

As a result of a review of the project studies performed by Vodocanalengineering SPLLC, the PWPP Environmental Impact Assessment Report and the meetings held in the municipalities of Tryavna and Plachkovtsi, the extreme significance of Neikovtsi Dam for overcoming the negative environmental consequences of suspension of the construction is emphasized. The analyses of the construction performance status, assessments and forecasts of possible impacts during the construction and operation of the water-power system prove the feasibility of mitigating the negative environmental impacts and of creating a health and comfortable living environment for the population in the municipalities of Tryavna and Plachkovtsi.

11. INTRODUCTION

2.1. General

The government of R. Bulgaria requested the World Bank's assistance in financing of activities related to the Municipal Infrastructure Development Project which will help Bulgaria to comply to the European Union's directives on potable and waste water and the environmental protection factors in the investment arrangements that will be acceptable and eligible for financing from the European Union's Structural Funds and are not covered by other EU grants.

The Project, the preparatory part of which is this Environmental Due Diligence Report (EDDR) encompasses the completion of three water-supply dams (Neykovtsi, Plovdivtsi and Luda Yana) where construction was suspended in the last decade, rehabilitation of the wall of an operating dam (Studena Dam), as well as rehabilitation of the water supply system of six companies providing water supply and sewerage services (Dobrich, Razgrad, Sliven, Smolian, Stara Zagora and Targovishte)

2.2. Purpose of the Project

The purpose of the Project is to ensure better water supply and responsible use of the water resources underlying the state policy for sustainable development of the water sector. It is in the spirit of the National Strategy of Bulgaria for Environmental Protection (2005 - 2014) that envisages ,,provision of good-quality water and sufficient water supply for all purposes".

The purpose of the Project will be achieved by means of: improvement of the conditions of water supply for domestic & drinking needs in selected regions;ensuring the required quantity and quality of potable water;reduction of losses in the water supply network; improvement of the reliability and efficiency of water supply systems and facilities; provision for environmental requirements and regulations with respect to the systems; enhancement of the operators' management and operating capability, etc.


2.3. Bank's Requirements and Documents.

The overall environmental category of the proposed Project is A in line with Bank policies with individual investments that belong to both category A (the proposed dam completion activities and category B (the rehabilitation of water networks).

Based on the proposed Project Investments the following World Bank's safeguards policies and procedures are triggered: OPIBP 4.0 1 Environmentul Assessment; OPJBP 4.12 Inv~~luntury Resettlement; OPIBP 4.37 Sujhty oJ' Dums; and OPJBP 7.50 Projects on Internutionul Wuterwuys. Furthermore, adequate protection and maintenance of ecosystems downstream of the dams should be assessed during project preparation to determine the relevance of the OPIBP 4.04 Nuturul Hubituts and OPIBP 4.36 Forestry safeguard policies. Also, given the possibility that proposed water companies might implement projects in cities with historic districts, the OPN 11.03 Culturul Property safeguard policy might be triggered.

The following documents will be prepared by the Government of Bulgaria prior to project appraisal: (1) Environmental Framework of the Project (EF) for all proposed subprojects; (2) Environmental Due Diligence Report (EDR), including, in summary, assessment of the site conditions and assessment of the possible environmental impacts related to completion and operation of the proposed three dam sites; (3) Environment Management Plans (EMP) on investment in rehabilitation of the water distribution networks in which the contract provisions for construction works will be specified related to application of the technical standards and other requirements relevant to the construction phase. 4) project Land Acquisition Policy Framework that will outline the process to be followed in case there is land acquisition needed for the project; and (5) Social Due Diligence for the three dam sites that presents an overview of the past land acquisition process carried out by the Government.

2.4. Technical Documentation and Study of the Environment

The preliminary studies performed by Vodocanalengineering SPLLC (former Vodocanalproekt) in 1972 justify the need for construction of Neikovtsi Dam on the basis of processed hydrological information, water-economy investigations to determine the typical capacities (sedimentation, unavailable, effective and total) and dam elevations, and cost analysis to prove the project efficiency. In 1978 the engineering design of the two diversion systems with four water intakes was completed, and the engineering design of the dam was developed since 1982-1983. Several design elaborations were made, and as of the beginning of construction in 1986 the detailed designs were partly prepared. In 1990, a new update of the hydro- engineering surveys and water balance studies for the Neikovtsi water supply system were performed. On the basis of these studies, the quantities required for water supply to the Tryavna and Plachkovtsi Municipalities were defined, whwreby all engineering solutions were specified and development of the detailed designs started. The PWPP design dated from the beginning of the eighties. (As of 1980, there were three design phases in the Bulgarian design practice: preliminary investigation, engineering design and detailed design). Due to delay of the construction work the PWPP design was repeatedly updated. The latest update was made in 1994.

Before 1991 there was no developed Environmental Impact Assessment procedure in Bulgaria. An Environmental lmpact Assessment Report for Neikovtsi dam had not been assigned. A preliminary EIA report was developed for the PWPP in 1999 (before 2003 EIA in Bulgaria had two phases: a preliminary and a final report, and they could be comb~ned in one by way of exception). No procedure was carried out for the PWPP EIA Report and no decision was issued by RIEW - Veliko Tarnovo. Studies of the water in the river Neikovska were carried out from 1290 till 1994 by Vodocanalengineering SPLLC (former Vodocanalproekt). A list of design documents and an EIA Report, as well as the study results are presented as appendices.

Neikovtsi Dam Environrnentul Due Diligence Report

111. PROJECT DESCRIPTION

Neikovtsi Dam is built in the valley of the river of Neikovska. It is situated above the Neikovtsi residential area of the town of Plachkovtsi within 7,5 to the south of the town Tryavna. The dam is a multi-annual compensating basin. It was designed for potable water supply to Tryavna, Plachkovtsi and the settlements in that region.

Currently, water is supplied by the Tryavna-Plachkovtsi Group and several local water sources. The majority of them have variable flow rates which definitely results in problems with normal water supply to the population. According to data from the W&S Company of Gabrovo, in 2007 water had to be transferred by pumps from South Bulgaria in order to save the tourist business. In the villages, opportunities are sought to use water from borehole wells which also have varying flow rates.

Construction of the water supply system started in 1978 and ceased in 2001 after several interuptions. It was performed by Hydrostroy JSC who used in part the construction site at the dam above the Neikovtsi residential area situated on the left bank of r. Neikovska.

Neikovtsi Water Power System includes: Neikovtsi dam, diversion gallery, a cylindrical intake tower, bottom outlet, grouting gallery, spillway on the left batter, intake headraces with 4 captations on the rivers Somarinenska and Plachkovska and a potable water purification plant (PWPP), which is immediately above Tryavna.

Dum wull

The dam wall is of the rock-fill type, with asphalt-concrete diaphragm (ACD). The main parameters of the dam and the reservoir are as below:

Maximum height Crest length Total storage reservoir: Lake length: Effective storage capacity Unavailable storage capacity Water catchment area: Catchment area mean altitude: Annual average influx Ponded area Crest elevation Elevation at the highest water level (HWL) Elevation at the lowest water intake level (LWIL) Maximum water supply discharge

Total water supply quantity

Flooding flow (ecological discharge)

Intuke tower

The intake tower is near the right-hand river bank in front of the upstream cofferdam. It is a reinforced- concrete structure with trunk diameter 4,5 m. An arc-shaped spillway with transition section, chute and ski-jump is provided for discharge of the high waters. The spillway is rated for 0,1% discharge (once in 1000 years). The bottom outlet is located in the gallery through which the river water is drained during the dam construction.

Potuhle Wuter PzrriJicution Plunt (PWPP)

PWPP is about 2 km away from Tryavna and 1,3 km from a branch of the road Gabrovo- Tryavna. The water fed from the dam to the purification plant and then to Tryavna flows through steel pipes 0530. At the purification plant, as a result of laboratory analyses of the water feeding Neikovtsi Dam, the plant performs water purification by turbidity, color, oxidizability, ammonia and nitrate content, cetane and microbial number. The PWPP is designed for purification of Q,, = 240 11s. Due to delay of the


construction, the design was updated several times to incorporate up-to-date equipment and automation. The latest update was made in 1994. Appendix: (water supply plan of the town of Tryavna from Neikovtsi Dam, topographic map, forest map with Neikovtsi Dam, photos).

Present state of Neikovtsi Dam

Upon a walkdown of the dam and the facilities the following findings were made: The dam wall has been built up to a height of about 16 m which is 30% of the required construction work. The upstream batter to the dam is covered with stone slabs, and the downstream batter - with crushed rock. The cofferdam and the drainage gallery on the right-hand river bank are completed. The intake tower is partly built (up to 113 of its height). The grouting gallery is built up to the embankment height with a formed ACD core wall, part of the measuring instrumentation ([&C) is installed; there are, however, some doubts that it may have undergone damages; the diversion works and the four intakes from which water is fed to Tryavna are completed. The bottom outlet and the internal technological system are completely built (up to the dam and intake tower and up to the spillway on the left bank of the river Neikovska). The following works on the auxiliary facilities have been performed: the Suhodole quarry 5 km away from Plachkovtsi is started, the construction site for temporary buildings where the caravans, the concrete facility, etc., are partly preserved, is prepared.

The PWPP is 40% built, the water mains - 90%, and the roads - 100%.

No work has been carried out on the spillway, the chute and ski-jump, the lock chamber, the uncovered canal, no mechanical or electrical equipment has been installed, no humus storage site has been established.

The following construction works have to be performed to complete the dam: rock fill, asphalt-concrete diaphragm, installation of the C&I system, spillway with chute and ski-jump, completion of the PWPP; concrete and erection works on the intake tower, erection worls on the bottom outlet; assessment of the condition of the bridge at Plachkovtsi, and adoption of measures for repair of the damages caused in the course of construction on 3rd and 4'h class roads of the national and municipal road network. Construction works on the dam and the related facilities and PWPP will be carried on simultaneously. The construction milestones will follow those adopted for the construction work done so far.

At the stage of design updating, the waste quantities, construction work schedule, effluent discharge from the PWPP, and humus storage site will be specified. As for the dam, the cofferdam and the height of the built part of the dam ensure the volume needed for water precipitation without any risk of water pollution (increased turbidity) in the r. Neikovska.

The Contractor will be in charge of the construction works; W&S LLC - Gabrovo will appoint the minimum staff for the operative unit who will perform measurements with the installed C&I system.

Construction monitoring reports will be submitted annually to the Danubian Region Basin Directorate - Pleven and to RIEW - V. Tamovo.

The following steps are to be taken: a detailed review of the as-built drawings of completed constructionlerection work, including hidden works; reassessment of the high water amounts taking into consideration hydrological data from the recent 30 years and update the dam crest elevation depending on the required freeboard; conduct micro-seismic studies to determine the seismic hazard on the dam site; obtain samples of the enbankment in the filters and the rock massif and evaluate the geo-engineering indicators of the materials; check the deposits of filling materials at the Suhodole borrow pit; update the cross-section profile of the dam wall depending on the results of geo-engineering, hydrological and seismic studies; check the condition of the installed measuring instrumentation and update the I&C design if required; assess the condition of concrete structures and assess the condition of the intake works; update the dam and PWPP designs;

IV. OPTION ANALYSIS

The studies on the construction of Neikovtsi Dam date back to 1972. The following options were considered:

1 1 '


Locution options: Several ranges were studied, including water pumping from Dryanovo and use of mine waters from the Lev Mine. Finally the proposal for the dam range was on the basis of the conclusion that there is no real alternative watewr source to Neikovtsi Dam. It was preferred also due to: availability of ~ suitable geological-engineering exploration conditions, sufficient area for the lake to provide for multi- annual regulation; availability of an asphalt-paved road to the dam.

Wuter supply discharge options:The long time of design and construction with interruptions of both processes necessitated several water demand updates related to the demograpohic and economic 1 development of the region. The latest updating was done in 1990 and confirmed in 1999 in an EIA for the

l 1 PWPP. The towns Tryavna, Plachkovtsi and the settlements in the municipalities proved over the recent 1 1 years the amount of design discharge needed for water supply owing to a lasting trend to development of I I summer and winter vacation business, country tourism, eco-tourism and other attendant activities. 1

I Options ofdum und reluted jucility types. The dam type was adopted after proving the cost indicators of

l several dam types and the operation safety in the conditions of 7'h degree seismicity for a 2"d class I

l structure. The choice of related facilities (intake tower and spillway with chute and ski-jump) was

i dictated by the terrain configuration and the overflow parameters.

Zero option: A zero option was considered, but it was not accepted because Neikovtsi Dam proved the l I only actual source of water supply to the towns Tryavna, Plachkovtsi and the settlements in the i municipalities. 1

l l The option proposed for PWPP site was accepted due to advantages with respect to land expropriation I

and proximity to road communications.

i As of the present date, the dam has been built up to 16 m height and construction has been suspended for 1 six years now.

Possible new options: presewution oj'the current shte, purtiul completion and liquidution ofthe dum.

The need j')r Neikovtsi Dum

All data collected by the team (all its members included) and the public discussion in Tryavna, as well as

i the prospect studies of W&S LLC -Gabrovo, do not indicate absence of the need of feeding water to the settlements discussed. Irrespective of the negative demographic trend till 2005, the towns Tryavna, 1 Plachkovtsi and the settlements in the municipalities, thanks to their appropriate climate conditions, rich cultural heritage and history and the highly pro-active attitude of the population, are extected to become, in the short term, an attractive and popular destination for tourism and vacation. That is manifested particularly well by the interest in purchase of residential buildings and estates, maintenance and refurbishment of the urban and village environment, establishment of Rennaissance-style regions where

i traditional trades are developed, such as wood-carving, etc.

Envirc~nmentul impucts I i i

Preservution c?f'the current stute. The dam condition will have to be reassessed; dam construction shall be frozen with provision for the incremental costs for safety. Construction of an overflow is required to

! assure high-water passage in the lower river sector by construction of a stilling basin and regulation. That determines the need of selecting a new spillway site and building a road to it. Operating staff shall be

i l

employed to monitor the dam condition using the updated C&I system. Recultivation of the borrow pits I and the areas around the dam shall be performed. A regional development plan shall be drawn up and I l

implemented for rendering the visual impact of the rock fill more acceptable. Dewatering of the sector of I

i Neikovska from the dam to Plachkovtsi and isolation of the ichtiofauna upstream of of it from the lower river sectors remains.

l ' Purtiul completion. The partial completion requires search for an additional water source. It has been proven over the years that there is no additional source and a basic social problem - water supply, would

l i not be solved. Similar to the first option, the additional engineering solution and the expenses to cover them remain. In addition, the dam design shall be updated as required by the regulations. That option

l; cannot be estimated as one requiring lower capital investments due to the need for new relief facilities. i i

The operation costs are almost the same without meeting the necessary requirements for water supply to I the three municipalities. Comparison of the environmental impacts to those of the proposed option with i I 1

8 of 49

I

Neikovtsi Dam Environmental Dzte Diligence Report

final completion of Neikovtsi Dam is impossible due to the unclarified height of the partly completed dam.

Liquidation oJ' the dam. Liquidation of the dam will result in hard to predict consequences to the environment due to the need to assure natural letting through of the high water, in which case the rock fill has to be removed and disposed of. The concrete structures will have to be demolished and the area - recultivated. During liquidation, a new Operating Instruction and Accident Action Plan are required.

The three alternative options discussed as possible are unjustified and inacceptable to the Bulgarian party from economic, social and environmental point of view.

The towns Tryavna, Plachkovtsi and the settlements in the municipalities need the completion of Neikovtsi Dam, and there is no alternative to is for solution of the water supply problem without water rationing, with good quality water.

V. STATUS ANALYSIS, BASELINE INFORMATION

5.1. Atmospheric Air

5.1.1. Climate

Neikovtsi Dam belongs to the Fore-Balkan climate region encompassing the hilly areas at the very foot of Stara Planina, at 300-350 m altitude in the north, reaching about l000 m in the south, with 5 18 m altitude of the dam waterplane in the case of normal filling. As a whole, the region has a moderately continental climate and, at the same time, wide spatial variation of climate characteristics values caused by the great variety of morphometric indicators is observed.

Winter - Winter in the region is cold and, as expected at such altitude, the mean temperatures in January are about -2°C. The mean minimum temperature for January is about -6", and the absolute minimum temperature may fall below -14-15°C. The mean maximum January temperatures are about 2" C. In some cases the occurrence of foehn causes an increase of the maximum temperatures that may exceed 13°C. The snow cover is relatively durable in the northern parts and for a period of 30-60 days on the average. The region is characterized by relatively good aeration conditions. The mean monthly wind speeds are about 2 m/s. North-west winds prevail in the region in winter as well as almost all the year. In certain synoptic situations there occurs foehn leading to a rise of temperatures and thawing of the snow cover.

Summer - The mean monthly temperatures vary over the range 18-22°C in the lower open parts of the considered region. In the zone these temperatures may be about 0,5-l,O°C lower. In prolonged anticyclone conditions the maximum temperatures exceed 33°C. Upon cold inrushes the temperatures may drop even below 14" C.

Spring and autumn - Spring is cool, with mean monthly temperature in the central spring month about 10". Autumn is about 6°C warmer than the spring. In the middle of March, the mean daily air temperature is above 5" C, dropping below that limit in the end of December. In spring, the mean monthly wind speed is in the interval of 1-2 mls. The atmosphere dynamics typical of spring is manifested in the lower percentage of calms, and autumn is the season of lowest winds.

Precipitations and evaporation are the two main climate elements influencing the water reserves in closed water basins. The region is characterized by a typically continental distribution of precipitations with a strongly pronounced maximum in the warm half of the year and minimum in the cold half. The annual amount of precipitations in the region is within the limits 780-890 mm. The seasonal precipitations are, respectively, about 160-170 mm in winter, about 230-240 mm in spring, about 280-290 mm. in summer and about 170-1 80 mm in autumn. About 60-70% of the winter precipitations are of snow. The maximum daily precipitations in the region are determined by the location and may exceed 100 mm.

5.1.2. Air Quality

Afier suspension of the construction the air quality corresponds to the natural conditions of the environment. The towns Tryavna and Plachkovtsi are not sources of air pollution. There is no pollutant transport from other territories. The only pollution source is the motor vehicles. The traffic increases on weekends both in summer and winter, without significant impact on air purity.

Neikovtsi Dam Environmentul Due Diligmce Report

5.2. Water

5.2.1. Surface waters

Hydrological, hydro-geological, and water economy studies were carried out for Neikovtsi Dam by Vodokanalengineering SPLLC. The latest studies date from 1990. The available information from four HMS (hydro-meteorological stations) was used. After processing, the data was reduced to the four captations and the dam range. The high water was determined with Q, /probability of occurrence coefficient1 0,1%, 1% and 5%. In the river system, there are HMS measuring the river drift (as of 1990 for 10 to 19 years). The obtained results were used to determine the river drift to the dam range.

Water quality was studied in great detail in the rivers within the water catchment area near Neikovtsi Dam by organoleptic and physico-chemical indicators, as well as microbiological assay, and water sample radioactivity was studied for the years 1990 till 1994. The analyses were performed by Vodocanalengineering SPLLC (former Vodocanalproekt) and are attached in full tom the EIA Report for the PWPP (Appendix: Excerpts from Reports). The 16 m high wall already built has separated the sector upstream of the dam from the lower sectors of the river. The sectors are connected through the bottom outlet. The river run-off drastically decreases during the summer and winter low-water seasons. The river goes almost dry both upstream and downstream of the dam down to Plachkovtsi, with a few small pools left.

At the height where it is built, the dam is a potential threat to the residents o f Neikovtsi residential area and of Plachkovtsi in the event of high water. Flowing over the embankment (as in the event in 2001 when the bottom outlet was completely filled up) threatens to destroy the embankment and trigger a destructive wave.

5.2.2. Ground Water

The study on Neikovtsi Dam of 1990 (Annex: Designs) emphasizes the need for special infiltration- prevention measures due to the hydro-geological characteristics on the left and right-hand batter and the high water permeability of the the rock bed.

5.3. Geological Conditions

In geological terms Neikovtsi Dam belongs to the Fore-Balkan Paleogene System. The Paleogene sediments in it stretch as a narrow, almost unbroken strip in the southemmost parts of that zone.

The region where Neikovtsi Dam is situated comes under the Assemblage of thick-bedded flisch.

The assemblage is underlain, in visible concordance, by sediments of the Belene Suite. A flisch alternation of dark-grey to black argillites and thin-bedded sandstones occurs in the lower part of the cross section. Up the cross section it gradually tums into a thick-bedded alternation of sandstones and argillites.

The sandstone seams are usually thick (up to I ,O m or more). Their composition is polymictic - consisting of quartz, feldspars, mica, and their link is clayey-limy. In places the sandstones pass into conglomerates. The argillites are dark-grey to black. The thickness of the assemblage reaches 450-500 m, maybe even 1000 m. In the region of the dam the sand-argillite assemblage is highly cracked. About 20 m wide fracture zone is observed right in the range where the dam wall is situated.

The dam wall is built of limestone. The Suhodole borrow pit is within 5 km of Plachkovtsi.

The limestone is extracted from s small field, several hundred meters. The limestones are grayish-white or light cream-colored, with massive texture. Most of them are organogenic, karstic and cracked.

5.4. Soils

The soils in the region of Neikovtsi Dam are of the Luvisols type, grey forest soils. Up the slopes outside the dam basin they turn into brown forest soils.

The grey forest soils are typical of the lower vegetation belt of North Bulgaria as well as of the lower- mountain subbelt of the middle-mountain belt. They have developed on diverse soil-forming rocks due to which their mechanical composition varies from clayey-sandy to sandy-clayey, often rocky.


Only the soils below the dam have affected by the construction of the darn wall before 2001 and by the construction of a service road.

The soils in the dam bed are moderately deep and slightly rocky in the shady places and shallow, moderately rocky on the sunny slopes. There are no ledges in the gullies, their bed is rocky.

The soils in the region are not polluted by noxious substances or waste.

5.5. Waste

No construction debris or unregulated solid waste dump sites were found upon inspection o f the water-power works.

5.6. Harmful Physical Factors - Noise

Currently, there are no noise sources in the territory of the hture Neikovtsi Dam since the construction ceased in 2001. The background noise is the natural background of the environment and stays within the limits 30 dBA - 43 dBA (in the immediate vicinity of the river).

5.7. Flora

According to the classification schedule of forest habitat types (forest vegetation territories) in Bulgaria, the region of Neikovtsi Dam is in the Misian forest vegetation region, subregion North Bulgaria, median mountain belt of the beech and coniferous woods, low-mountain subbelt of durmast, beech and tir-trees.

The original ligneous forest vegetation in the region is mesophite phytocenoses of beech (Fagus silvatica). There are some individual specimen of hombeam (Carpitus betulus), Durmast oak (Quercus dalechampii), silver lime (Tilia argentea), and along water courses, ivy (Salix alba and Salix caprea).

As a result of reconstruction of some low-productivity hombeamibeech stands and afforestation of barrens, significant areas of forest cultures were created in the region, mainly of Scots pine (Pinus silvestris). They often include offshoot fiom the original vegetation - beech, hombeam, Durmast oak.

Before building of the dam, the forest vegetation in the basin had been partly cleared (about 60-70 dca). Since the deciduous vegetation of a suitable age is renovated by offshoots (i.e., abundant offshoot stems appear after tree cutting), currently that area is a 25-year old offshoot plantation of beech and hombeam with very good density, mean height 7-8 m and mean diameter 5-6 cm., mean stock of wood mass about 1 10 m3/ha.

In recent years cutting of the original vegetation went on, spreading over the remaining areas of the future reservoir. The mean age of these "new" offshoot woods is between 10 and 15 years, their mean height 2-4 m,, mean diameter 2-3 cm., mean stock (a very large percentage of thin trees) about 30-40 mi/ha (See Appendix: Forest Map). The original ligneous vegetation in the dam lake bed is beech and hombeam, consisting of offshoots after the cuttings. The prospective dam is situated in an area of protection (AP) under Natura 2000 Bulgarka Natural Park the declared purpose of which is "...protection, restomtion and muintuining oj'the beech ecosystems ... ". The purposes declared upon establishment of the park concern seminal beech ecosystems. In that case the offshoot stands are solely of local significance (firewood).

Protected Natural Territories

Neikovtsi Dam is inside the boundaries of Bulgarka Natural Park situated on the ridge areas and north flanks of Central Stara Planina above the towns Gabrovo and Tryavna. This is the youngest natural park in Bulgaria declared with Order No. PA-775 of 09.08.2002 issued by the Ministry of Environment and Water for the purpose of protection, restoration and maintaining of the beech ecosystems and landscapes typical of Stara Planina, the flora, fauna and the wealth of common heritage in the region. The park is part of AP Natura 2000.

The park territory encompasses the springs and the water catchment area of the river of Yantra and the main tributaries in their upper courses with an area of 21772 ha and includes territories of Gabrovo and Tryavna Municipalities. The mean altitude is 940 m,, and the displacement - 1120 m. The territory of the natural park includes the ridge areas of the mountains Shipchenska and Trevnenska, to the west - the countryside Uzana and Osenikova Polyana, to the east it stretches up top the protected area Studen Kladenets, the adjacent northern slopes and part of the related Fore-Balkan.

Neikovtsi Dam EnvironmentuI Dzre Diligence Report

5.8. Fauna

5.8.1. Ichtiofauna

The study was carried out on 31.08.2007. The sector from r. Neikovska in the zone of the prospective dam lake and from the dam wall up to the town Plachkovtsi was walked down and some visual observations and fish catches by means of nets were performed. Survey data on the fish fauna in the region and data from studies for the purposes of the ecological network NATURA 2000 were used (the expert is member of the team appointed to propose territories for protection under Natura 2000).

Currently, the river of Neikovska is blocked by the ready part of Neikovtsi Dam. Connection between the river sector upstream and downstream of the dam wall is possible solely through the bottom outlet. At the time of the study the river sector in the zone of ponding had run almost completely dry. There was no ichtiofauna in the few puddles left. The river sector fi-om the dam wall up to the Neikovtsi residential area is also of a fragmentary nature. Individual water pools (up to 0.2 - 0.25 m deep) alternate with dry sectors of the river bed. No fish was found in that sector either. lchtiofauna was observed only in the river sector on the territory of Plachkovtsi, characterized by higher discharge. The following species were established: Chub (Leuciscus cephalus), Balkan barbel (Barbus petenyi), Loaches (Cobitis taenia), Gudgeon (Gobio gobio) and Pacific gudgeon (Gobio kessleri). Three of the above-listed species - Barbus petenyi (Barbus meridionalis), Cobitis taenia and Gobio kessleri - are included in Appendix I1 of Directive 92143lEEC as preservation priorities. According to local residents' observations, during the spring high water some Chubs, Balkan barbels and Gudgeons reach the dam wall without, however, passing through the bottom outlet in the sector upstream of it. During high water periods, Brown trout (Salmo trutta fario) also appears in the river, obviously coming from the lower river sectors. In high water periods the upstream movement of the fish is quite difficult due to the specificities of the river bed morphology and the presence of dry sectors (Appendix: Methodologies and Sources).

5.8.2. Amphibia and Reptiles

Information on the herpetofauna was collected as a result of a visit on 3 1.08.2007 to the dam wall under construction, its vicinities and part of the area to be flooded, and from the literature.

The species composition, environmental status and locations of established and probable species are presented in a table.

Among the species listed in the Table, beside the five species found on 3 1.08.2007, are the undoubtedly widespread, in all places with similar ground profile and vegetation, Brown toad and Salamander. One is almost sure to meet also the Coronelu Austriucu Iuuri. snake and the Dice snake. The two other species - the Great Worty newt and the mountain frog - can hardly be met in the region of the dam and in the areas to be ponded. The nature of vegetation and the complete absence of long standing water preclude their existence in that area.

None of the listed species have high environmental status (except the Great Worty newt which can hardly be met here, but even if it does, the creation of a new water basin will have a beneficial effect on its total abundance. There are no species entered in the Bulgarian Red Book (v.11, Animals - 1985) and protected under the CITES Convention. (Appendix: Methodologies and Sources).

Species composition, environmental status and locations of established and probable species

Species

--

Salamander

Great Worty newt

Yellow-belhed toad

Brown toad Blg water frog Aglle frog Mountain frog

Environmental status Location of occurrence

Tryavna, Plachkovtsi, Koychevtsl Gabrovo, Tryavna

Tryavna; The dam

Tryavna In the dam The dam around Tryavna

BDA App.No.

111

11,111

11

111 1 V I1 II,IV

Info. from: (author)

BZ4 1, VK,1912 VK, 1912 VK,1912 VB, 31807 BZ, l942 VB, 31807 VB, 3 1807 VK,1912

IUCN

LR

Berne Conv.

111

11

I1

I11 I I1 I I 111

' 92/43

IV

II,IV

V IV V


I I IV Thedam VK,1912 I1 IV Thedam VB, 3 1807

Dice snake I I IV Tryavna VK,1912 Coronelu Austriucu 111 I I IV Tryavna VK,1912

L Iuuri. snake Notes: BDA - Biological Diversity Act (SG No.7712002); IUCN - Red List of Threatened Species; LR - low risk; Berne conv. - Convention on Preservation of the European Wildlife, App. 11, 111; Dir. 92/43 - EU Directive 92/43 on Preservation of the Natural Habitats and Wildlife, App. 11, IV and V.

5.8.3. Mammalian Fauna

The area of Bulgarka Park, with its diverse lay, soils and climate, conditions the great variety of plant and animal species. In terms of zoo-geographical territory, it comes under the European Fauna - the Stara Planina region. The park is a habitat of numerous invertebrate and vertebrate animals.

The route and survey methods were applied in the status assessment. Some bibliographical sources are used.

In general, the endangered and rare mammals entered in Appendices 1 and 111 of the Berne Convention are comparatively well preserved in the region - the European wolf (Cunis lupus) and the Brown bear (Ursus urctos), as well as species entered in the Red List of IUCN for 2000: European river otter (Lutru lutru) and some kinds of bats. The Hare (Lepus cupensis), the Fox (Vulpes vulpes), the Badger (Meles meles), the Wild boar (Sus scroju), the European polecat (Putorius putorius), the Squirrel (Sciurus vulguris), the Roe deer (Cupreolus cupreolus) occur comparatively frequently. It should be noted that zoological research in the region is extremely insufficient.

The small mammals: Rodents (Rodentia) - various kinds of Mice (Apodemus spp. and Mzls spp.), Pile voles (Microtus spp.) and insect eating species (Insectivora) - Hedgehogs (Erinucem concolor), Moles (Tulpu europueu), Long-tailed shrews (Sera spp., Crociduru spp.,) are permanent inhabitants of the region (Appendix: Methodologies and Sources).

5.8.3. Ornitofauna

In zoo-geographical terms, the the ornitofauna is of the palearctic type - mainly species of the moderate geographical latitudes.

41 bird species were registered within the site range and in its vicinity. The species composition is comparatively scarce, determined to a high degree by the relative uniformity of the territory as habitat.

! Of the species nesting in the region, the Chaffinch and the Redbreast (robin) are the most numerous; the Blackbird, the Chiffchaff, the Blackcar and the Great tit are also represented by a considerable number of specimens. Of the swallows, the Red-rumped swallow is the most abundant.

I The species presented in Appendix 2 (plant and animal species endangered by extinction, preservation of which is a priority) of the Biological Diversity Act are:

4

1 . Golden eagle (Aquilu chrysuetos (L.)) - flitting and flying round specimens

2. Peregrine falcon (Fulco peregrinzis Tunstall) - flitting specimens

3 . Hazel hen (Tetrustes bonmiu) (L.)

4. Red-backed shrike (Lunius collurio L.)

None of the five species are connected with the river itself.

Only flitting and flying round specimens have been registered of the Golden eagle and Peregrine falcon. The site and the adjacent territories are not their reproductive habitats.

The Hazel hen breeds in the forests in the region, but no longer in those already affected by construction works for the future dam. That species restored its abundance in the forests throughout the

I country and is not rare or endangered with extinction. ! The Red-backed shrike - three couples of that species were observed in the region of the site on the

banks in the region downstream of the wall and high up the slopes above the right-hand river bank. Some

13 of 49

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Neikovtsi Dam En vironmental Due Dilizence Report

specimens live in thinned woods along the road below the dam wall, and near the village. The construction works may have affected some specimens and couples of that species inhabiting thinned areas along and near the river banks but that is not very likely because these parts of the area are with high forest density which is avoided by the couples of that species (Appendix: Methodologies and Sources). .

5.9. Landscape

The changes in landscape environment in the considered region have already occurred to a large extent. The wall of Neikovtsi Dam has been built up to 16 m, the ligneous vegetation has been cut and now restored as offshoots, the quarry has been developed and the construction sites of the dam wall and PWPP are prepared.

Suspension of the construction has a negative effect on the landscape due to the fact that the activities required for recultivation of the land disturbed by the construction and finishing works on the facilities have not been performed. There are some calvings on the upstream batter of the dam.

5.1 0. Health Factor

Neikovtsi Dam will be built in the immediate vicinity of Neikovtsi residential area of the town Plachkovtsi. Tryavna Municipality and Plachkovtsi have 14139 residents, 94% ofthem ion the two towns, and the rest in the villages and hamlets. The geographical and meteorological conditions and the historical and cultural heritage define the region as a resort and tourist destination. The only air pollutants are the transport vehicles and burning of firewood for domestic purposes. Irrespective of the favorable environmental conditions, the health and social status of the population is characterized by: unemployment in the region which is 11% according to the latest data; steady negative demographic growth that reached 8,32%0 in 2005. The primary causes of the death rate are: acute myocardial infarct, hypertension and the brain vessel diseases, and diseases of the respiratory system.

The infectious diseases carried by water in the districts of Smolian, Veliko Turnovo and Pazardjik in 2005 and 2006 vary with respect to: dysentery (Shigelosis) 9,9 to 44,4 per 100 000; virus hepatitis 44,6 to 180,3 per 100 000. These data are within the average for the country (sporadic cases). There is no data about connection between these diseases and water quality. Dangerous cholera and typhoid fever infections have not been registered in the country for more than 40 years.

Population moving is not necessary.

5.1 1. Common Heritage

There is no information about presence of any historical, archaeological or architectural finds. No such finds have been recorded during the construction of Neikovtsi Dam. In the event that such finds are discovered in the process of the project completion or upon sanitization of the lake, according to the Cultural Heritage Act, the Archaeological Institute with Museum shall follow the required procedure.

VI. FORECAST OF EXPECTED IMPACTS ON THE NATURAL AND SOCIAL ENVIRONMENT DURING THE CONSTRUCTION OF NEIKOVTSI DAM

6.1. Free Air

6.1 . l Climate

The modification of the substrate surface in consequence of construction of Neikovtsi Dam (lake area 32,5 ha and length 1300 m) leads to certain microclimate changes within the dam boundaries and in the adjoinint territory, however, these changes may have a beneficial effect on the flora and fauna in the particular location, without changing the climate in the region.

During operation of the dam, the processes of climate change and variations over the recent years characterized by certain warming and dry spells, as well as more intense manifestations of extreme situations - long dry spells and heavy rains shall be taken into account. In order to achieve environmentally sustainable management of the dam and water resources, while avoiding the critical and

Neikovtsi Dam Environmentul Due Diligence) Report

dangerous consequences to the region, a local meteorological monitoring system consisting of stations for observation of the main meteorological components shall be established.

Construction and operation of the dam will have no detrimental environmental effects on the local cllmate. Its proper management with reporting of the data from the monitoring system will result in optimal water reserve management and will have a beneficial effect on the environment in the region (Appendix: Methodologies and Sources - Studies and publications on a 4-year experiment at G. Dimitrov (Koprinka) dam with area 1120 ha).

6.1.2 Free air quality

Dam

During construction

The use of building equipment and heavy transport vehicles will result in noxious emissions at the construction site of the dam wall and intake tower and in the Neikovtsi residential area during the haulage of materials and equipment to the site.

The quarry is far from the settlements (the villages Stoevtsi, Kusevtsi) and the blasting works do not affect the population.

No excavation work has been performed on the spillway, the chute and the ski-jump. The humus has not been stripped (its quantities are limited due to the high afforestation in the prospective dam bed).

Other sensitive points of air impact will be the concrete-mixing plant near the village and and the asphalt plant which will be largely screened by the ligneous vegetation.

During construction of the dam the major building machinery: bulldozers, rollers, dump trucks, compressors are a source of dust and SO2, NO2, and organic volatile (OV) emissions that can exceed the permissible concentration limits (PCL) in the work environment

During the dam construction and transportation of material for it from the quarry and of equipment through the villages and Plachkovtsi, the roads shall be sprinkled with water and the trucks carrying blasted rock shall be covered.

There is no risk of air quality deterioration in Neikovtsi residential area (Appendix: Methodologies and Sources).

P WPP

The PWPP is far enough from Tryavna, and owing to the scale and type of the construction works, its construction creates no air pollution hazard in the working environment or to the residents. The design of PWPP indicates that in the process of operation PWPP may cause air pollution within the work environment below the permissible concentration limits (PCL) without any effect on the residents.

During operution

During operation Neikovtsi Dam will not affect the air quality.

6.2. Water

During construction

The high water levels and inwash to the dam are determined in the design. On the basis of results obtained the spillway, the chute and ski-jump are dimensioned. The unavailable dam capacity is determined (for 100 years operation of the dam).

The water that would be needed during construction of the Water Power System was determined and the water sources were secured. They have supplied the site during the preceding construction work and can supply it during its further construction. The auxiliary base used on the site till 2001 (offices, warehouses, utility premises with bathrooms, etc.) can be refurbished and used again during completion of the Water Power System.

Since the construction of the first 16 m of the wall has been built, there is no risk of pollution of the water in r. Neikovska by undissolved particles (increased turbidity) in the course of further construction. During


construction of the spillway, the chute and ski-jump the construction effluent must pass through a mechanical clarifier (at the end of the ski-jump) and then discharged into the r. Neikovska.

Chemical toilets shall be provided for the sewage on every construction site and a contract shall be concluded with a firm for their servicing.

Construction of a workers' camp is not necessary.

With proper monitoring of the technical condition of machinery, the use of gas stations and existence of a duly secured fuel and lubricant storage, there is no risk of polluting the water of r. Neikovska during construction of the dam by oil leakages and spills.

Construction of the PWPP started in 1985 which necessitates continuous updating of the design with a view to geological conditions, need for cementation measures, cracks found in the placed concrete. The geological-engineering report of 1992 offers solutions for draining all waters from the PWPP site during construction, without any risk of pollution of the water bodies.

Dzrring operation

A PWPP is planned to provide high-quality potable water

The following is planned for the operation phase of Neikovtsi Dam to secure purity of the water in it: sanitation of the dam lake basin. Until 1952 there were several residential buildings on the right-hand lake shore (the Kolyo Ganev hamlet). The buildings were demolished, but there is still an old graveyard that has to be moved and sanitized. The sanitary protection zone of the lake shall be planned in conformity with the new SPZ Regulation for zones 1, I1 and 111.

Sewage generated both during construction and during operation can be disposed of by erection of chemical toilets.

The problem with outfalling the effluent from PWPP is not solved and an additional design solution is required inorder to secure protection of the surface and ground water from pollution.

The operation of Neikovtsi Dam disturbs the natural run-off conditions in the river Neikovska. The amount of water flow in the river is important.

The run-offrate in the r. Neikovska is 0,073 miis. The tributary of r. Neikovska is not sufficient to cover the need for water notwithstanding its regulation in Neikovtsi Dam. It is planned to transfer the discharge from the 4 captations to Neikovtsi Dam to be regulated there.

The catchment rate of the captations which are currently supplying Tryavna is almost 100%. The ecological releases are 1 - 5 Iis.

A flooding flow amounting to 0,010 m3is can be released downstream of Neikovtsi Dam to preserve the river ecosystems in r. Neikovska.

An additional model study was carried out to define the flooding flow by a methodology developed in Bulgaria.

A mathematical model based on the dependency of zoobentos (Macroinvertebrates) total abundance on the run-off was used. The change in total abundance is viewed as a probabilistic process.ln order to establish the model parameters data from matching total abundance values and mean monthly discharge, covering an overall vegetation period are needed. For that purpose, summarized data from long field observations throughout the territory of Bulgaria was used. The Fischer criterion as well as total abundance variations were implemented to assess the significance of zoobentos cenosis in different flooding conditions. A software was developed for the purpose of these calculations.

The flooding conditions are determined by the following pattern: modeling of zoobentos development under natural run-off conditions; modeling of the disturbed run-off conditions downstream of the dam by the balance method in different flooding modes. Due to the modest capacity of the water reservoir and distinct seasonal irregularity of run-off, a large part of it will overflow in spring. That will have a favorable effect on the river ecosystem; modeling of zoobentos development for the obtained different modes of run-off disturbance; comparison of the obtained series of mean monthly values of total zoobentos abundance under disturbed conditions to that obtained for the natural one, in order to select an appropriate flooding mode.


In order to maintain a stable ecosystem in r. Neikovska, a flooding flow of 0,010 m3/s is recommended, the releases being larger - 0,100 m3/s, for ten days each of the three months - March, April and May during the spring high water. (Appendix: Methodologies and sources).

Work on the problems of the permissible run-off minimum in water courses downstream of hydro- engineering facilities in Bulgaria has been going on since 1987. Over the recent decade various possible ways of releasing such water from the reservoirs were investigated. At Neikovtsi Dam this will be done through the Intake Tower from a height suitable for the ecosystem (10 m below the lake surface). If dewatering of the river is established in natural conditions during a low-water season, such releases into the river will be secured, and during the spring and autumn high water, water will be released at the rate 0,100 mys in March, April and May for ten days each month.

6.3. Geological Conditions

During construction

The dam wall built so far, due to precipitations and weathering on the upstream side is with heavily deteriorated integrity, while its downstream side is in good condition. For that reason, in the beginning of dam completion, the whole surface layer shall be completely removed the and replaced by new material.

The left and right banks are heavily cracked and display visible fractures, therefore it will be quite important to build fan-shaped anti-infiltration diaphragms on both banks in order to prevent enveloping infiltration;

The fracture observed in the right-hand batter (it may be found in the left batter too) shall be studied and the measures needed to stop possible infiltration through it shall be adopted;

Due to high water permeability of the rock bed and risk of enveloping infiltration, special attention shall be paid to sealing works in the process of dam construction as well as precise grout injection works for construction of the grout curtain in order to reduce the enveloping infiltration round the dam;

During operution

With a view to control of water infiltration through, under and round the dam, the design includes a monitoring system of piezometers by means of which observations can be performed also of the infiltrated water properties as well as of the presence of suffusion. The C&I system provides also deformation monitoring of the dam, its base, the diaphragm, crest and berm subsidence and displacement.

Regular observations shall be camed out of water afflux into the dam basin and the run-off from it in order to prevent emergency situations in cases of heavy precipitations and intensive thaw.

The dam is situated in a zone with 7th degree of seismicity which determines the design and in-operation requirements (Appendix: Regulations).

6.4. Soils

During construdion

Reassignment of the land for the dam and PWPP was performed by the respective procedure. Land expropriation was completed in conformity with the prevailing regulations, from its former owner, the Plachkovtsi State Forestry.

Loading of the soil with dust, combustion gases and blast works during the construction on the adjacent lands will also be insignificant.

A new construction site is not planned - the base (former Hydrostroy) about 300 downstream of the dam will be used. It is comparatively well preserved (with workshops, garages and an operating concrete mixing plant). The terraion of the site is municipal.

Sanitization of the dam bed requires stripping of the humus and its storage in order to use it later on for recultivation of all lands affected by the construction of the Water Power System. No site has been allocated for humus storage.


During oprrution

The total pondable area is 32,5 ha - forest fund according to the forest development plan of Plachkovtsi Forestry since 2003, bu excluded from the fund for the purpose of dam construction.

6.5. Waste

During construction

Upon resumption of the construction of Neikovtsi Dam the organization of waste collection, transportation and disposal shall be restored in compliance with the Waste Management Act.

All waste types with their six-digit codes are defined in accordance with the types indicated in the Waste List in Appendix No.1 to MoEW Regulation No.3101.04.2004. on Waste Classification.

Domestic waste from the kitchen and canteen is collected and, together with the municipal waste of Plachkovtsi is deposited at the disposal site of Tryavna.

The waste wooden packings and metal from the equipment are utilized in the construction or sold to the residents.

The construction debris - spoil material - are left on the vacated site at the borrow pit and utilized, depending on the forestry's' capacity, for improvement of roads. For the remaining waste left from the administrative building of the dam and from the PWPP (bricks, tiles, earthenware, etc.) an agreement is concluded for the Tryavna landfill. The metal scrap is delivered for reprocessing. Waste oils and liquid he ls are treated by a firm with which a contract for their recycling is concluded. In the case of waste with "*" code (hazardous waste), a firm possessing license for their treatment is contracted. In the end of the construction all the waste shall be removed from the Water Power System sites.

During opperution

During the operation phase the domestic waste from the building at the dam (2 person staff) will be handled together with those of Plachkovtsi.

There is no design solution for the problems waste from the PWPP - domestic, sludge from the dryng basins, etc. The sludge shall not be used for recultivation without an analysis proving their fitness for utilization.

The domestic waste generated by the dam and PWPP operating staff (2 persons at Neikovtsi Dam and 15 persons at the PWPP) will be transported to Plachkovtsi or Tryavna and treated together with those of these settlements.

At all phases, repair works included, the requirements of the Waste Management Act shall be met.

6.6. Harmful Physical Factors - Noise

During construction

The ambient noise sources are the majority of works involved in completion of the Water Power System construction (partly excavation, filling, concrete, shuttering, erection, drillinglblasting, transportation works). The main machines and equipment used are: dredger, bulldozer, crane lorry, concrete mixer, concrete placing equipment, crushing plant, heavy-duty trucks, with noise levels within the range 80 dBA -105 dBA, reaching 120 dBA at the drilling equipment. Blasting creates pulse noises with levels depending on the blasting system. The building machinery will be concentrated at the dam site. The expected equivalent noise levels in the immediate vicinity of the groups of operating machines and facilities are about, sometimes more than, 90 dBA. The crushing plant will be near the quarry and will create noise levels within the 88 dBA - 96 dBA range.

The network of service roads for the transport vehicles used for the construction has been built. The heavy duty trucks, depending on the traffic intensity, will create noise at the equivalent level of about 60- 61 dBA, at 7,5 m from the axis of travelling.

The boundary values of noise level for the different territories and zones defined in Regulation No.6 on Environmental Noise Indicators (Ministry of Health, Ministry of Environment and Water, 2006) are: for residential areas: daytime - 55 dBA, evening - 50 dBA, night time - 45 dBA; for industrial/warehouse zones: daytime, evening and night time - 70 dBA.


The nearest settlement - Neikovtsi residential area - is about 300-400 m away from the site of the prospective dam. From there, there is direct visibility to a house near the dam wall which is heavily cracked and used as temporary shelter. Due to the sufficient distance from these residential areas, the construction activity on the site will not be a source of excessive noise to them during the daytime (7.00 119.00 hrs) or in the evening (1 9.00 -23.00 hrs).

The transport vehicles traveling to and from the construction site will deteriorate the acoustic environment of the residential areas adjacent to the transport routes, with existing low noise background of about 35 dBA, due to the very low traffic load of the roads in the region and lack of other significant noise sources.

The trucks from the quarry will pass near Plachkovtsi and through the Neikovtsi residential area, the villages of Kusovtsi and Stoevtsi. The equipment will arrive fi-om Tryavna through Plachkovtsi.

The expected noise in excess of the sanitary noise limits for the residential areas along the road is about 5 dBA for the daytime and about 10 dBA - for the night. The noise impact is time-limited, till completion of the construction work on the site.

During operution

During operation of the site the PWPP equipment (pumps, mixers, air blowers, hydrophore, etc.) will be a source of noise. According to their technical characteristics the emitted noise levels are within the limits 70-75 dBA. The equipment is installed in a solid building, with concrete structure and expected noise insulation by the face walls minimum 35 dba. The noise levels outside the building are not expected to exceed 45 dBA which is far below the 70 dBA sanitary limit.

The PWPP is sufficiently far from Tryavna and will not be a source of noise to the town

6.7. Flora

During construction

During the construction phase sanitization (cutting and uprooting of ligneous vegetation) will be carried out on an area of 32,5 ha forest fund of Plachkovtsi State Forestry. On the Forest Map, the future lake is shown in white which indicates that it has been excluded from the forest fund of the State Forestry.

Building of Neikovtsi Dam affects directly solely the flora inside the dam basin.

No negative impacts on the surrounding (outside the ponded area) forest ligneous, frutescent or herbaceous vegetation are expected during the construction of the site.

2,5 ha are destroyed on the site of the PWPP, 1,O ha of which is forest fund of Tryavna SF and 15 ha of agricultural fund (anthropogenic species). Land reassignment and the land expropriation procedure are completed in the manner established by law.

During operution

According to the design, a total area of 32,5 ha will be flooded in the dam basin.

There are no rare or endangered species among the plants affected by the dam construction according to the law provisions. The information was obtained as a result of a walkdown of the whole area of the prospective lake in August 2007.

Assurance of the permissible munumum run-off during the summer low water period will create better conditions in the lower sectors of r. Neikovska, including the forest ecosystems.

6.8. Fauna

6.8.1 Ichtiofauna

IchtioJuunu Impuct Prognostic Assessment

In the event of implementation of a zero scenario (preservation of the current state) there are no prospects of restoring the river continuum and improving the ichtiocenosis condition in the affected sector of the river Neikovska.

Neikovtsi Dam Environmentul Dzte Diligence Report

After commissioning Neikovtsi Dam, there will be prerequisites for stabilization of the environmental conditions for the ichtiofauna in r. Neikovska and for mitigation of the negative impact of summer low- waters through controlled release of flooding discharges.

The potential threats for the ichtiofauna in the r. Neikovska and its extension, the river Trevnenska, can be related to two main forms of negative impact on the river environment: insufficient flooding of the river bed; release of water from the deep water layers of the dam characterized by permanently low temperature and higher concentration of nutrients.

In order to prevent the above-listed negative impacts it is necessary to ensure adequate flooding of the river bed downstream of the dam with a view to creating an acceptable living environment for the existing species, corresponding to the specifics of their biology. The "ecological releases" shall be drawn from the lake at depths not exceeding 10 m. (Appendix: Methodologies and Sources).

6.8.2. Amphibia

Amphibiu and Reptiles lmpuct Prognostic Assessment

All amphibians (the first 7 species of the table - 5 of them are proven inhabitants of the WPW site) will receive better living conditions because the river goes almost completely dry in summer. After ponding of the reservoir, the Big water frog will become the most numerous. Ponding will destroy only a neglectable small part of the territories inhabited by the above-indicated species in the region. The security of the Water Power Works will be an additional benefit for the environment around the reservoir, inclusive of the reptile and amphibian fauna.

Although not very likely, there may be a few individual specimens of tortoises in the zone of the reservoir which have a very high environmental status. Upon the first ponding the lake shall be watched for specimen swimming on the surface near the water front. They shall be taken to suitable places above the highest water level and released there. In the course of that, some other animals may be saved - hedgehogs for example.

No special monitoring of the amphibian or reptiles is needed in the region of the dam

Construction and operation of Neikovtsi Water Power System will not cause visible damage to the reptiles an amphibians in the region, and will even have a beneficial effect on the water loving species which, according to more than 100-year studies, inhabit riverside pools. The only species of high conservation value (the Great Worty newt), if it occurs in the region, will be favorably influenced by the prospective water reservoir. According to some studies, about 70% of these species inhabit the shores of small dam lakes.

The amphibian and reptile fauna in the regikon of Neikovtsi Dam is scarce and does not include species of high environmental status. Construction and operation of the dam will not result in serious negative consequences to the existing few most common species. (Appendix: Methodologies and sources).

6.8.3 Mammalian fauna

Mummuliun lmpuct Prognostic As.sessment

Generally, the ponded area of 32,5 ha, and the completed dam wall will not have a negative impact on the existing mammal fauna. Due to the relatively limited time limit for construction works (about 30% are already completed), they will not affect any feeding base or habitats of any individual mammal species and that will not have any effect on their total abundance.

It can be stated with confidence that completion of the dam will not have a negative impact on the habitats and abundance of the mammalian fauna. Withdrawing to higher places, the migrating specimen will not come upon a territory overpopulated by some populat~on where they will lack hiding places or will be deprived of their feeding base. The mammalian Sauna inhabiting the particular region and is presented in the Environmental Due Diligence Report is typical of considerably larger territories than the area to be ponded by the dam. (Appendix: Methodologies and Sources)


6.8.4 Ornitofauna

> \ sment Ornitc~fuunu Impact Prognostic Assc ,:. The dam construction has already disturbed the ground surface and and the vegetation on it as well as the habitats of certain specimens of the bird species living there; however, the area occupied by the dam is too small. It is envisaged to release certain environmental discharges.

Implementation of the project can hardly affect the habitats of the abovementioned species listed in Appendix No. 2 of BDA. The three couples registered in this territory inhabit places outside the site area and will continue to live in their nidification territories even after completion of the dam.

The scope of the investment proposal does not include places where regular (annual, seasonal) concentration of large numbers of certain bird species has been registered.

After ponding, some fish species typical of, or inhabiting still and slowly running waters, may appear, and their quantity may increase with time, which, in its turn, will result in increase of the feeding base for some fish catching diving bird species - Grebes (Podicipedidae), Cormorants (Phalacrocoracidae), Smew (Mergus ulbellus L.), Red-crested pochard (Nettu m$nu (Pallas), Aythyu sp. Etc.,) etc., and possible arrival of specimens of such species in regular intervals. The lake will probably attract also specimens of some other wading and water loving bird species - Ducks (Anus sp.), Storks (Ciconiu sp.), Herons (Ardeidae).

The dam cannot have any negative impact on bird migration in that region of the country. The size of the lake cannot be a barrier to migration.

The site is in the territory of Bulgarka Natural Park, however, due to its small area (32,5 ha compared to 21 772 ha), it cannot have significant negative impacts on its omitofauna.

As a result of the prognostic assessment, there are no grounds to believe that the construction and operation of the site will inflict irreversible damage on the omitofauna in this region of the country that would result in destruction of rare and endangered bird species. The species mentioned occur throughout the territory around the dam and the conclusion about the mammalian fauna applies to them as well (Appendix: Methodologies and Sources).

6.9. Landscape

The proper architectural solution of the PWPP, color selection, verdurization, site recultivation and ponding of the dam will create the new landscape.

The assessment of the self-purificatiuon and restoration potential of the landscape in the considered region lays the stress on its significant potential for fitting into and matching the scale of Neikovtsi Water Power System to the natural environment. Lakes are not a foreign element to the mountain, and the new artificial will fit into the natural landscape As a component of the landscape PWPP, with its minimal dimensions, allows very good fit with the landscape and visual perception.

6.1 0. Health Factor and Social Significance

The dam wall is within about 300-400 m from the outermost houses of Neikovtsi residential area, and in the immediate vicinity (about 100 m) there is a cottage used as temporary dwelling. The quarry and crusher are within 6 km from the dam, near the village Stoevtsi. The nearest houses are about 700-800 m. away, and the lay of the area provides for screening. Maximum two blastings per month or per two months are planned. Rock for the dam will be transported by the route Stoevtsi - Kyosevtsi - Plachkovtsi (Neikovtsi residential area). The temporary concrete facility is at the end of Plachkovtsi, and transportation will be carried out from there to the dam through Neikovtsi residential area. That will be done while no filling work is going on. Asphalt will be delivered from sources outside the regon.

The increased traffic of vehicles carryng building materials will be limited. The traff~c noise and dust emissions as well as exhaust gas emissions will be insignificant, temporary and, subject to implementation of the necessary measures, will not have any harmful effect on the population. Blasting will be incidental, temporary, far from any dwellings, so the blast gases and noise will have no harmful effect on the population.


Dur~ng the construction, with respect to construction workers, a number of factors of the working environment and labour process, adverse microclimate, noise, vibrations, air pollution by exhaust gases, traumatism, and physical strain may have an adverse health effect The working environment factors may have certain impact on the workers' health. The effect will be temporary and, provided that adequate measures are adopted for protection of the workers' life and health, it will be minimized.

A beneficial social effect is expected with respect to the population thanks to creation of temporary jobs at the construction site.

Dztring Oerution

No increase of humidity and /or climate change is expected during operation of the dam. The dam operation will not have an adverse effect on the population in the nearby settlements.

A beneficial effect with respect to the population in the region is expected as a result of: opening of permanent related to operation of the facility as the potable water source. The improvement of potable water supply will be a guarantee against epidemic diseases spread by water. Water consumption meeting the Bulgarian and European standards will have an indirect health effect on the population.

6.1 1. Safety of Neikovtsi Dam

Dam safety is of substantial economic, social and environmental significance.

Assurance of the safety of large dams such as Neikovtsi shall underlie the Investment Proposal from the very beginning.

Earth- and Rockfill Dam Dimensioning Rates 119861, Civil Engineering and Architecture Newsletter - issue Nos. 1 and 6, and Hydro-Engineering Facility Design Rates, Basic Principles promulgated by the Ministry of Construction and Urban Development and Ministry of Energy, 1985 (in Civil Engineering and Architecture Newsletter - issue No. 1111985) are applied in the dam design process in Bulgaria. Due to expired limitation term of the above-listed documents and absence of an Eurocode in the European Union for the design of hydro-engineering facilities, internationally accepted codes are applied, such as those of US Department of the Army Corps of Engineers, the German codes, etc., as well as Bulgarian codes and regulations on building structure design, and integrated into the Design Contract. The hydrological risk in the event of passing of high water with a certain probability of occurrence coefficient, and the seismic risk in the event of earthquake of certain intensity are assessed in the process of design. Within the design, a section on Control and lnstrumentation (C&I) systems is developed. As of the date of site commissioning, an C&I Monitoring and Measurement Schedule, Operating Instructions, and Accident Action Plan (Emergency Management Plan) shall have been prepared by the Designer for the construction and design phases.

The availability of, and compliance with normative requirements shall be verified before commissioning of the site by the State Acceptance Commission (Regulation No. 212003 on Commissioning of Construction Works in Bulgaria and the Minimum Guarantee Periods applicable to Acceptance of Construction and Erection Works, Facilities and Construction Sites (State Gazette No. 7212003). A definite part of the operation staff shall be appointed at the commencement of construction, and upon commissioning the complete operating team shall be appointed. The service life of dams is assumed to be 100 years (the time of reaching the volume of silt defined for the reservoir).

For the sake of dam safety, the operation of dams shall be carried out in conformity with Regulation No. 13/29.01.2004 on the Terms and Procedure of Operation of Dams and Related Facilities. The Monitoring and Measurement Schedule shall be implemented at every stage of dam operation, and updated at regular intervals. On the basis of measurements made by the operating staff, the structural and technological security, as well as environmental impact of the dam will be assessed (the degree of risk to tangible property and people's lives and health). The security in normal, extreme and accident operation conditions is assessed. Twice in a year, the operating teams will perform visual inspections of the dam, the water area and the related facilities which will be reflected in a report containing the relevant decisions. Analysis of the dam condition shall be prepared or assigned by the operating entity (on the basis of technical inspection results and I&C data). Such analysis shall cover a period not exceeding three years and shall be accepted at a Technical Expert Board appointed by the Owner. The inspections for safety assessment of the dam and the related facilities shall be performed by experts not related to the operator organization. The first inspection shall be carried out before the start of ponding, the following

'

I

Y


inspection - in the end of the initial operation phase, not later than the fifth year of commercial operation, and further inspections - by decision of the Technical Expert Board appointed by the Owner.

In the event of a high water flow with a level near the highest water level (HWL) and upon detection of an earthquake with intensity exceeding 6th degree by MSK-64, inspections and full measurements of all

I facilities shall be made using all C&I devices in conformity with the Schedule, with record and status ~ analysis. ! I In the event of emergencies and accidents, the Accident Action Plan shall be operated. Such Plan contains 1 the assignments, relations and responsibilities of the institutions obligated on the strength of the Crisis

Management Act.

The ecological risk for dams and related facilities is related not only to their safety but also to the risk of changing the quality of the environment in all its components, as indicated in Part 6 of the Ecological Analysis. With a view to the prognostic estimates, the environmental risk for Neikovtsi Dam is assessed in a Risk Schedule

6.1 2. Cross-border Effect

Neikovtsi Dam is situated immediately above the residential area Neikovtsi of the town Plachkovtsi.

No cross-border effect will be manifested during the construction of Neikovtsi Dam due to the situation of the project site in the interior of the country.

l During operation, the volume of run-off retained from the r. Yantra at its confluence with the Danube is considered cross-border effect. The run-off of the r. Yantra at its mouth is estimated in General Schedules of Water Use in the Basin Management Regions of R. Bulgaria (BAS-IW 2000) as 1573,8.10%3/year. About 80 small and large dams have been built in the catchment area of Yantra (the largest reservoirs are Al. Stamboliyski Dam - 220,0.10%' and Yovkovtsi Dam - 92,O. 0.10' m').

Neikovtsi Dam is built for the purpose of water supply. The dam capacity to be used for water supply is defined by the Designer as 5,60.106 m3/year. Eighty percent of the water fed to the water supply system is returnable, that is, it returns to the rivers through the sewer systems. The water retained in the territory of R. Bulgaria amounts to 1,12.1 O6 m3/year, or 0,07 1 % of the run-off of r.Yantra.

6.13. Natural Areas of Protection and Project Compatibility with the Subject and Objectives of Natural Area Protection

Neikovtsi Dam is inside the boundaries of Bulgarka Natural Park included in the Natura 2000 protected areas. Construction activities are permitted in the natural parks, and water supply projects are of high priority and their construction in natural parks can be permitted. The compatibility of the Project with the subject and objectives of area protection (by general indicators because development of the management plans for each of the declared zones is still pending) is determined, in the first place, by the percentage

i share of the anthropogenically affected temtory in the total area of a zone. For Neikovtsi Dam, with 32,5 ha of 2 1 772 ha park area, the share is 0,15 % (or less than 1 %). Construction of the dam started in 1980 or 22 years before announcement of the park. Much of the impact on the affected area (construction of the

! dam and the facilities related to it, cutting of the original ligneous vegetation and building of service roads and auxiliary construction sites) has been consummated. According to a consultation carried out with the National Nature Protection Authority at the Ministry of Environment and Water, projects for which an Environmental Impact Assessment Report has been developed and accepted, or are granted a construction permit and have entered upon the construction phase, will be excluded from the territory of the protected area.On these conditions, Neikovtsi Dam meets two priority requirements: it is a potable water supply

l facility over 30% of which is built, and there are no legal restrictions on continuing its construction.

!

l i

23 of 49

Neikovtsi Dam Envivonmentul Due Diligence Repovt

Schedule of Environmental Risk Resulting from Impacts Due to Construction and Operation of Neikovtsi Dam

+ prognosticated low degree ++ prognosticated medium degree

otes

On the way from the quarry to the site through settlements (villages Stoevtsi, Kusevtsi, res. area Neikovtsi)

Impact Sources Components

Free air

+

+

Fauna

During operation Neikovtsi Dam and reservoir

PWPP

Health factor

+

+

+

+

W ater

+

(++l +

During construction

+

+

+

+

Neikovtsi Dam and reservoir

Transport routes

+

+

+

+

Geological conditions

+

+ to ++

++ in the work environinent upon an accident

+

+

Soils Waste oise lora

+

+

+

+

+

+

+

+

+

+ to ++

+

+

+

+

+

+


VII. LEGISLATIVE FRAMEWORK AND ORGANIZATIONAL STRUCTURES FOR MANAGEMENT OF THE ENVIRONMENT

Design and construction of Neikovtsi Dam were performed in compliance with a Council of Ministers' decision. A decision was made to stop financing of the dam. In these circumstances the Consultant of the invited tender financed from the grant, will prepare Terms of Reference for design updating and for the construction.

No EIA procedure has been carried out for Neikovtsi Dam because its construction started before 1991 when, with the Environmental Protection Act, the Environmental Impact Assessment requirement was adopted. An EIA report was developed for the PWPP in 1999 but a procedure was not started. Depending on the Bank's requirements and subject to its coordination of the Ministry of Environment and Water of Bulgaria, this case can be solved under the circumstances with respect to the project as of the present date.

A complete list of Bulgarian laws, regulations and other acts relevant to an environmental due diligence report is enclosed (Appendix: Regulatory base).

In the process of construction, supervision of the implementation of environmental protection measures is exercized by the Regional Inspectorate of Environment and Water (RIEW) - V. Timovo, and in the event of receiving reports about health risk to the population, by the Regional Inspectorate for Protection and Control of Public Health (RIPCPH). The environmental engineer of the Municipality of Tryavna performs regular checks of measure performance and of the condition of the environment, and reports the findings to RIEW - Veliko Tamovo. In the event of non-compliance, RIEW - Veliko Tamovo imposes penalties, sets deadlines for performance of the prescriptions and, in the last resort, terminate the non- conforming activity.

The Own-monitoring Plans for the construction and operation phase shall be developed at the start of construction and operation and approved by BD, RIEW and the Ministry of Environment and Water (Implementation Agency for Environment - IAE). It shall be updated annually and approved by these three institutions. In the end of every year they shall receive reports on the basis of which some additional monitoring requirements can be set, or some requirements can be withdrawn. The monitoring term shall be defined in the EIA. The Ministry of Health (MH), through its subdivision RIPCPH, and Water and Sewerage - Smolian, shall have the standing responsibility for water quality control and, as required, inclusion of the dam into the National Monitoring Network under MoEW (IAE).

VIII. ENVIRONMENTAL IMPACT MITIGATION PLAN

A significant part of the environmental impacts of the construction of Neikovtsi Dam to 16 m height of the dam have been consummated.

About 30% of the dam construction works were performed by 2001: excavation works, 16 m embankment, asphalt-concrete diaphragm to the height of the embankment, a major part of the concrete works on the intake tower; completely finished bottom outlet; roads to the intake tower and the spillway; started exploitation of the Suhodole quarry; prepared construction site for the dam; two subsequent clearings of ligneous forest vegetation in two different periods. The road network is 100% ready, but the bridge at Plachkovtsi has to be strengthened. No moving of residents is needed. The remaining works are building of the embankment to crest elevation (26,O m), the asphalt-concrete diaphragm, C&I installation, spillway, chute and ski-jump construction, erection works on the mechanical and electrical equipment, and construction of the PWPP.

Building of the dam to 16 m height, and of the cofferdam integrated in the dam, ensure protection of water purity in the r. Neikovska during the completion of the dam. For the period of construction of the spillway, the chute and ski-jump, mechanical settling of the construction effluents shall be ensured before their discharge in the r. Neikovska.

The remaining construction works require adherence to the process of consecutive building of the dam and the asphalt-concrete diaphragm, of the grouting and quality control. In the dam construction practice these are activities in which the construction companies have the needed experience (there are 16 large


rock-fill dams in the country, such as Belmeken - 98 m and 98 large earth-fill dams such as Ogosta, 59 m).

The Environmental Impact Mitigation Plan is proposed taking into account these circumstances. It includes measures required during construction as well as during operation of the Neikovtsi Water Power System.

On these conditions, an Environmental Impact Mitigation Plan is proposed. The Environmental Impact Mitigation Plan includes measures required both during construction and operation of Neikovtsi Water Power System.

Atmospheric air

8.1. Restriction of land disturbance within the construction time limits; water sprinkling;

8.2. Use mobile water sprinkling systems for dust suppression, on the temporary roads across settlements and at the construction sites;

8.3. The operation of the building machines and motor vehicles shall be accompanied by periodical adjustment of the diesel and gasoline units; the daily schedules shall be observed for the purpose of maximum efficiency; minimize the ,,idle running" of machines;

8.4. The physical condition of the building machines and motor vehicles shall be checked every shift for breaks, spills and leakages. Sequestration of the pollutants in emergency situations.

Water

8.5. Construct a water meter station in the dam lake tail for metering of water inflow.

8.6. Construct, in an appropriate place downstream of the bottom outlet, a measuring template for monitoring the ecological releases dischared from the dam lake to be monitored.

8.7. On the basis of the design of sanitary protection zones I, I1 and 111, benchmark zone I;

8.8. Sanitizethereservo~rbed;

8.9. Secure delivery of ecological discharge at the rate 0,010 m3/s., and during the spring high-water period, release additional 0,100 m'ls for 10 days;

8.10. Erect chemical toilets during the construction and operation phases

8.11. Reasses the amount of the permissible minimum discharge (ecological releases) downstream of the water intakes of the two collecting diversions before outfalling them in the reservoir;

8.12. During the construction, build a mechanical clarifier downstream of the ski-jump for settling of the construction effluents before their discharge into the r. Neikovska;

8.13. Move and sanitize the graveyard at Kolyo Ganev hamlet;

Geological Conditions

8.14. Study the failure in the right-hand bank (possibly in the left as well) and take the necessary steps to prevent possible filtration through it;

Soils

8.15. In the event of accidental spills and leakages from building or transport equipment, perform sequestration of the pollutants;

8.16. Meet the waste management requirements in order to prevent soil pollution in the adjacent areas;

8.17. During operation, perform regular visual inspections of the lake water area for possible development of erosion and landfall processes.

Harmful Physical Factors - Noise

8.19. The heavy-duty vehicles serving the dam construction shall keep within the permissible speed limit while crossing the settlements, the speed and routes being agreed with the municipalities.


8.20. Construction activities shall be performed mainly during the daytime.

8.21. The building equipment and works shall be concentrated, as far as possible, within the main construction site.

8.22. Examine the condition of the cottage near the dam with a view to the risk of its collapse.

Wastes

8.23. The requirements of the Waste Management Act shall be met during the construction and operation phases.

Flora

8.24. Blasting works near ligneous vegetation shall be performed by a "contained blast" technology.

8.25. For biological recultivation of areas affected by the construction as envisaged in the design, use species appropriate for the climate conditions of the region and possessing the respective "landscaping" properties.

Fauna

8.26. Blasting operations shall not coinside with the breeding period (end of April and May) as far as possible;

8.27. Ensure release of the ecological discharge from an appropriate level of the lake (not exceeding 10 m).

8.28. At the time of ponding, make sure that the individual specimens of tortoises should be taken to higher elevations above the water level.

Landscape

8.29. Examine and strengthen the bridge in Plachkovtsi;

8.30. Design a landscaping plan of the territory;

8.3 1. In the end of construction, perform recultivation of the affected lands outside the facilities

8.32. The PWPP building and the administrative building at the dam wall crest shall be in appropriate color and architectuiral style.

8.33. In the end of construction, perform repair of the affected sector of the national road network

Health Factor

8.34. Proper hygiene and living conditions, work clothes, personal protection means, and regimen of work and rest shall be ensured for the construction workers and vehicle drivers. The PWPP operating staff shall be supplied with the required means of protection, inclusive for events of accidents.

IX. ENVIRONMENTAL MONITORING PLAN

Before the start of the construction and operation phases, the Contractor, the Operating Unit and the Owner shall develop an Own Monitoring Plan reflecting the requirements set by regulations as indicated in art. VII.

The Monitoring Plan is presented in Annex 3

The monitoring plan shall be developed, performed, reported and supervised in conformity with art. V11 (Legislative Framework). The Project Management Unit established at MRDPW will receive all documents related to environmental management. The required reports will be submitted to the World Bank every six months.

A


In.stitUtionul respon.sihilities jbr implementution oj'environmentul impuct mitigation meu.sure.s und environmentul monitoring cfNeikovtsi Dum

During construction

Reporting relations and frequency

Contractor to the Construction Supervisor and RIEW, RIPCPH (acc.to the Monitoring Plan); Construction Supervisor to MRDPW; PMU at MRDPW to the Bank (every 6 months)

l

Decision making on monitoring performance measures lmpact mitigation and

monitoring responsibilities

MRDPW (Employer) RlEW - V. Timovo RIPCPH MOEW (IAE - if required, by an accredited laboratory)

Activities

Performance of mitigation measures and monitoring.

1n.stitutionul responsibi1itie.s jbr implementution cfenvironmentul impuct mitigution meusure.s und environmental monitoring oJ'Neikovtsi Dum

During operation

Responsible institutions and persons Contractor Construction Supervisor Employer (MRDPW) RIEW RIPCPH; Danubian Region BD - Pleven

1

X. PUBLIC CONSULTATION PROCEDURES

A public discussion of the Municipal Infrastructure Development Project, including the Environmental Due Diligence Report, was held in Tryavna on 19.10.2007 in compliance with the requirements towards this procedure (notifying the public by a notice at the town-hall and by announcements in the local media). The people attending the meeting called the attention to: possible climate changes, operating safety of the water power works, power generation capability, options of seeking water sources on the

I southem slopes of Stara Planina. All the questions asked by the audience were answered by the Project Team.

The public support the completion of Neikovtsi Dam due to circumstance that the need for normal water supply is quite urgent. During the low-water seasons the Municipality is subjected to water rationing, while during the spring and autumn periods of high water the quality of water is poor. The town is developing intensively, especially in the field of year-round vacatrion and tourism busibess, and that is impossible without securing the amount of water required for domestic purposes.

1 Consultations with the following administrative and competent authorities were held as well: i

1. RIEW - V. Tirnovo. At a meeting with Mrs Elena Grigorova, Director of RlEW - V. Timovo and ! Mrs. Ginka Stancheva, Head of Environmental Monitoring Department in RIEW - V. Timovo.

RIEW - V. Timovo has not carried out an EIA procedure for Neikovtsi Dam and PWPP because its i

l construction started before 1991 when, pursuant to the Protection of the Environment Act, an EIA requirement was adopted (Appendix: Minutes of Meeting and letter).

2. Tryavna Municipality. A meeting was held with the Mayor Mr. Stefan Blazhev and the Head of TSA

l Department Dipl. Eng. Kovachev. The Municipality stated readiness to support the construction of

28 of 49

I

Impact mitigation and monitoring responsibilities

W&S LLC- Gabrovo RIEW V . Tamovo Danubian Region BD - Pleven

Reporting relations and fi-equency

W&S LLC- Gabrovo to RIEW V. Tarnovo and Danubian Region BD - Pleven

Decision making on monitoring performance measures

Activities

Performance of mitigation measures and monitoring.

Responsible institutions and persons W&S LLC- Gabrovo RlEW V. Tamovo RIPCPH Danubian Region BD - Pleven

Neikovtsi Dam En vironmentul Due Diligence Report

Neikovtsi Dam which will ensure permanent water supply to Tryavna and the Municipality. There are no objections to construction of the dam from the public. (Appendix: Position Paper).

The Environmental Due Diligence Report was placed at the Municipalities' disposal in order that their population could be familiarized with it in detail. Access to it was provided by announcements on notice boards and in the mass media in every municipality. W&S LLC - Gabrovo, as future operator of the project, will include it in its web site.

In the process of construction and operation, record will be kept of all remarks and decisions made. Remarks, objections and recommendations cal also be sent directly to the competent authorities in conformity with the EPA.

Neikovtsi Dam Environmenbl Due Diligence Report

LIST OF ABBREVIATIONS USED

AI M

B AS

BD

W&S

EU

EEB

EPA

IAE

IWP

MRDPW

MoE W

E1 A

NGO

PCL

PWPP

RIE W

RIPCPH

WPW

CMS

UACEG

Archaeological Institute with Museum

Bulgarian Academy of Sciences

Basin Directorate

Water Supply and Sewerage

European Union

Environmental Expert Board

Environmental Protection Act

Implementation Agency for Environment

Institute of Water Problems

Ministry of Regional Development and Public Works

Ministry of Environment and Water

Environmental Impact Assessment

Non-government organizations

Permissible concentration limits

Potable Water Purification Plant

Regional Inspectorate of Environment and Water

Regional Inspectorate for Protection and Control of Public Health

Water Power Works

Central measuring station

University of Architecture, Civil Engineering and Geodesy

Neikovtsi Dam En vironmentul Dzie Diligence Report

APPENDICES

Water Supply Plan of Tryavna

Topographic map with plotted Neikovtsi Dam 1 125 000

Forest map with plotted Neikovtsi Dam 1 : 10 000

Photos

List of Designs for Neikovtsi Dam

Annex 1 - EIA Terms of Reference

Annex 2 - Environmental Impact Mitigation Plan

Annex 3 - Monitoring Plan

List of Methodologies and Sources used in the Environmental Due Diligence Report

Minutes of meeting and Position Papers of RIEW-Veliko Tarnovo, Tryavna Municipality

List of Regulation Acts


PHOTOS

bird' west i

View of the upstream dam batter

~ d a sin

ry of the new bed

View of the downstream dam batter


View of the intake tower

View of the diversion tunnel inlet


Monitoring measurement system

View of the grouting gallery

River of Neikovtsi in the low-water season

Neikovtsi Dam En vivonmentul fire Diligence Report

View of the construction site

View of the stone quarry

Neikovtsi Dam Environmrntul Due Diligence Report

LIST OF DESIGNS FOR NEIKOVTSI DAM

1. Update of hydro-engineering explorations and water balance studies for Neikovtsi Water

Supply System performed by Vodocanalengineering SPLLC- 1 990

2. Preliminary EIAR on PWPP - Tryavna - 1999 - not reviewed

3. Design data provided by Vodocanalproekt - Pure Water - Dipl.Eng. P. Surnev, 2007

5. Water Quality Reports /Excerpt/


ANNEX 1 TERMS OF REFERENCE

FOR THE PREPARATION OF SCOPE AND CONTENTS AND ENVIRONMENTAL IMPACT ASSESSMENT REPORT (EIAR) OF AN INVESTMENT PROPOSAL FOR NElKOVTSl DAM

The Contractor undertakes to draw up an Investment Proposal on Completion of Neikovtsi Dam:

EIAR Scope and Contents EIAR

The EIAR Scope and Contents drawn up by the Contractor shall meet the following requirements:

1. The EIAR Scope and Contents shall be drawn up taking into consideration the requirements of Art.96, para.1 of the Environmental Protection Act (EPA). The Terms of Reference for EIAR Scope and Contents are developed in compliance with the Regulation on Terms and Procedure of Environmental Impact Assessments (Council of Ministers' Decree 59/07.03.2003 and Council of Ministers' Decree 302/10.01.2006) with respect to:

- Consultations under Art.95, para.3 of the EPA with specialized departments designated by the Employer and stakeholder representatives.

- The Terms of Reference shall meet the requirements of Art.10, para.2 and para.3 of the Regulation. In conformity with that, the Terms of Reference shall reflect the activity envisaged in the Investment Proposal in adequate detail - Project Summary, adopted technology requirements, possible alternatives, natural resources to be used, condition of the environment and forecast of the possible impacts of the proposal on components and factors of the environment.

2. The Contractor accepts to develop the Environmental Impact Assessment Report in compliance with the following provisions of the Environmental Protection Act and the Regulation on Terms and Procedure of Environmental Impact Assessments:

- EIAR shall be prepared in conformity with the Terms of Reference under Art.10, para.3 of the Regulation and Art.91, para.3 and Art.96, para. 1 of the EPA. Particular attention shall be devoted to the required measures for prevention, mitigation, compensation and, wherever possible, termination of the negative environmental impacts, and the plan of their implementation.

- The Expert Team and the Team Leader shall meet the conditions of Art. 11, para.2, 3, 4, 5 and 6 of the Regulation.

- A non-technical summary under Art.96, para.1 of the EPA shall be organized in conformity with Art. 12, para.2 of the Regulation.

3. The Team Leader is responsible for the compliance with all requirements set by the regulations and the competent authority - RIEW - Veliko Tarnovo at the different stages of the EIA procedure.

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The blasting works, as far as possible, shall not coincide At SQ; Reflect in the The Contractor Construction Supervisor Fauna with the breeding period (end of April - May); End of April-May construction RIEW

calendar plan for the period end of April- May

Ensure release of the ecological discharge from an Intake tower; Included in the The Contractor Construction Supervisor appropriate level of the Intake Tower (not exceeding 10 m) during Intake project costs

Tower erection works

Upon ponding of the dam lake, take the individual tortoise In the lake basin Additional h n d s not The Contractor Construction Supervisor, specimens to elevations above the water level before ponding required RIEW, NGO Strenghten the bridge in Plachkovtsi The bridge; before Provide for The Contractor Construction Supervisor,

the start of additional funds in national road infrastructure construction the design update In all areas affected Provide for Construction Supervisor,

Design and implement a landscaping plan of the territory; by the construction; additional funds in The Contractor RIEW, environmental At the end of the design update expert of Tryavna constiuction Municipality

Landscape In the end of construction, perform recultivation of the In all areas affected Included in the The Contractor Construction Supervisor, affected lands outside the facility; by the construction; project costs RIEW, environmental

In the end of expert of Tryavna construction Municipality

The PWPP building and the administrative building on the Dam, PWPP; Provide for The Contractor Construction Supervisor dam wall crest shall be in an appropriate architectural style During the additional funds in and color design. construction the design update In the end of construction, repair the damaged sectors of the National road Funds shall be The Contractor Construction Supervisor, national road network network; In the end provided for in the national road infrastructure

of construction Health Factor Proper hygiene and living conditions, work clothes, On danl and PWPP Included in the The Contractor Construction Supervisor,

personal protection means, and regimen of work and rest construction sites, project costs RIPCPH shall be ensured for the construction workers and vehicle SQ; permanently drivers.

During the operation phase

Adhere to the plan of PWPP effluent outfalling after At PWPP; Included in the By the The Owner, RIEW treatment permanently project cost Operating Team

Water For dam and PWPP Funds acc. to the By the The Owner, RIEW Erect permanent chemical toilets for the operation phase operation staff; contract with the Operating Team

permanently During operation, perform regular visual inspections of the The lake area; by Included in the By the The Owner, RIEW,

Soil lake water area for possible development of erosion and the observation and project costs of Operating Team Danubian Region BD - landfall processes n~easurenlent observation and Pleven

program measurement program

Administrative Funds depending on By the The Owner, RIEW Waste The requirements of the Waste Management Act shall be building of dam and waste volume, Operating Team

met PWPP operation; landfills location permanently and contracts with

them Health Factor The PWPP operating staff shall be supplied with the PWPP; Included in the By the The Owner, RIPQPH

required means of protection, inclusive for events of permanent1 y operation costs Operating Team accidents

Danl Safety Compliance with Regulation 1312004, Operation On the danl and Included in the By the The Owner, RIEW, Instructions and the Accident Action Plan PWPP site; operation costs Operating Team Danubian Region BD -

permanently Pleven, Civil Defense Dept. at the Ministry of Disasters and Accidents

Neikovtsi Dain Environmental Due Diligence Report

ANNEX 3. MONITORING PLAN

When shall the How shall the

Where shall the parameter be Required Funds Organization in What parameter shall be parameter be

parameter be Impact on: monitored? (at what

monitored? monitored?/ type of intervals or /Cost/ charge of Monitoring

monitored? monitoring equipment continuously)

1 2 3 4 5 6 7 During construction / The Contractor,

Construction At express

Dust, gas pollution by Inspection. Checks at regular Supervisor, RIEW, On the constiuction analysis prices of

building machines and Measurement by an intervals, urgent the accredited RIPCPH, sites and roads

transport vehicles accredited laboratory checks upon report environmental expert laboratory of Tryavna

/ Municipalicy Atmospheric Air ( The Contractor,

Construction At express

Dust, gas pollution by Plachkovtsi, res.area Checks at regular Supervisor, RIEW, MeasLKement by an intervals,

analysis prices of RIPCPH, building machines and Neikovtsi, the villages accredited laboratory checks upon report transport vehicles Kusevtsi, Stoevtsi

the accredited environmental expert laboratory of Tryavna

1 Municipalicy

l / The Contractor.

Water

Construction At prices of the Supervisor, R I w , Water pollution due to failure downstream of the Permanently. In the accredited Observation, sampling

to adopt the planned measures dam and PWPP event of accidents laboratory environn~ental expert of Tryavna

/ Municipalicy . . . . 1 Fund for / The Contractor,

,. Possibl ' ' leaks I At the accident sites I Observation I Permanenth 1 secluestration of I Construction I S01ls . - - - - - - - - - - -. - - - - . . - - - . - . - - . - - spills I actual volumes Supervisor

l 7 I I 1 The Contractor. I At express Construction

On the construction Express measuring by Checks at regular analysis prices of Supervisor, RIEW, Noise

Noise sites an accredited laboratory intervals the accredited environn~ental expert laboratory of Tryavna

Municipalicy

Noise Plachkovtsi, res.area Express measuring by Checks at regular At express The Contractor,

44 of 49

Neikovtsi Dain Environmental Due Diligence Report

Impact on: What parameter shall be monitored?

Collection, temporary storage, transportation and disposal

Where shall the parameter be monitored?

3 Neikovtsi, the villages Kusevtsi, Stoevtsi

At sites designated by the Waste Management Plan

How shall the parameter be monitored?/ type of monitoring equipment

an accredited laboratory

Observation

When shall the parameter be monitored? (at what intervals or continuously) 5

intervals, urgent checks upon report

Permanently

Required Funds /Cost/

6 analysis prices of the accredited laboratory

No funds required

Organization in charge of Monitoring

7 Construction Supervisor, RIEW, RIPCPH, environmental expert of Tryavna Municipalicy The Contractor, Construction Supervisor, RIEW, environmental expert of Tryavna Municipalicy The Contractor,

Final sanitization of the lake Lake bed

Permanently in the No funds Observation Construction

bed course of work required Supervisor, RIEW

The Contractor,

Recultivation The planned terains affected by Observation construction work

Construction Permanently in the No funds course of work required 1 Danubian Region BD,

Fauna Blast work

Provision of personal Health Factor protections to builders and

machine operators

Quarry Inspection In the period end of April-May

On construction sites Inspection I Pernlanently

No funds required

No funds required

The Contractor, Construction

Construction

During operation I Meteorological

Atn~ospheric air; station near the dam With the installed Pern~anently after a Included in the Meteorological factors Operating team

Climate above water level instrumentation developed program project

Water

dav qtr

45 of 49

Influx to the dam Reading gauge station In con~pliance with the Permanently 3 times 1 Included in the Operating team

Neikovtsi Dam Envivonmental h e Diligence Report

Organization in charge of Monitoring

7

Operating team

Operating team, RIPCPH, W&S Gabrovo, MOEW (IAE) if involved in the National Monitoring

Operating team

Operating team, RIPCPH, W&S Gabrovo

Operating team, RIEW, RIPCPH, W&S - Gabrovo

Required Funds /Cost/

6

Minima; cost to be included in the design update

At prices of the accredited laboratory

Included in the project costs



Impact on:

1

Water in the dam lake and eutrofication control

Dam safety and aquatory inspection

Quality of water received and fed to the water supply system from PWPP Quality of sediments from the mud basins of PWPP

What parameter shall be monitored?

2

Release of minimum flow (ecological discharge) from the Intake Tower

Acc.to parameters indicated in the Monitoring Program

Implementation of an Observation and Measurement Program

In compliance with Observed Parameters Program

As indicated in the Reference Parameter Progran1

Where shall the parameter be monitored?

3

Measuring template

At various sections and levels in the dam lake

At the Central Measurement Station and along the waterfront

PWPP inlet and outlet

At the nlud basins

How shall the parameter be monitored?/ type of monitoring equipment

4 Measurement Program

In conlpliance with measurement requirements

In conlpliance with the Control Program

In compliance with C&I instructions and visual inspections

In compliance with the Measurement Progran1

In compliance with the Control Program

When shall the parameter be monitored? (at what intervals or continuously) 5

At regular intervals

In conlpliance with the Control Progran1

In con~pliance with Observation and Measurement Program

Permanently

At regular intervals till the possibility of their use is clarified


METHODOLOGIES AND SOURCES USED IN THE ENVIRONMENTAL DUE DILIGENCE REPORT

National Strategy of National Resource Utilization and Water Protection in R. Bulgaria, 1995. - MoEW, Team Leader R. Nikolaeva General Schedules of Water Use in the Basin Management Regions of R. Bulgaria, Sofia, July 2000 - MoEWI IWP IBAS Volume I. General Information, Methodological Foundations and Basic Formulations, General Assessments and Main Results Part VIII. Estimate of Water Quantities for Preservation of the River Ecosystems, Team Leader R. Nikolaeva 7.4. Methodology of Assessment of the Water Required for the Preservation of River Ecosystems Volume IV. Danubian Region 3. General Schedules of Water Use in the valley of r. Yantra Methodology for Balance Calculation of Pollutants Released in the Atmosphere, 2000 - MoEW EU Rates Euro-3 for Noxious Emissions from Road Traffic Study of the Geodynamic Processes in the Region of G.Dimitrov Dam and Assessment of the Anthropogenic Impact on Them, 1984-1 990. Concept and Program of Study of the Large Dams in Bulgaria, National Conference on Condition of the Environment in Bulgaria and Forecast of its Change, Sofia, 1990, NCID No. 18, p.7 - G.Gergov, A.Tzenkova, M.Tzenev Investigation of the components of the mass-energy exchange within the surface air layer around the "Koprinka lake", A.S.Tzenkova-Bratoeva, J.N.Ivancheva, and B.Veleva; W.L.Smith and Yu.M.Timofeev (Eds.), IRS 2000: Current Problems in Atmospheric Rudiution. A.Deepak Publishing, Hampton, Virginia, 2001, 1360-1 366 pp. Anna Tzenkova, Meteorogical investigation around the mountain reservoir. 241h International Conference on Alpine Meteorology (ICAM 1996), Bled, Slovenia, 9-13 September 1996 Pehlivanov L. Z. 2000. Water outflow as a cause of changes in trophic conditions for zooplanktivorous in reservoirs - Fisheries Management and Ecology, V. 7, 1 15-125 Pehlivanov L., Vassilev, M. 2003. Feeding of Age-l Perch ( P m u jluviutilis) with a View to the Diurnal Dynamics of its Distribution in the Alexander Stamboliiski Resevoir, Bulgaria. - Acta Zoologica Bulgarica, 55 (2): 81-90 Vassilev, M., L. Pehlivanov. 2005. Checklist of the Bulgarian Freshwater Fishes. - Acta 2001.

Bulgarica, 57 (2): 161-190 Beshkov V. 1961 Contribution to the zoo-geographical study of the herpetofauna in Bulgaria - Newsletter of the Institute of Zoology and Museum X 373-380 Beshkov V. 1972 Item I11 Studies on the ecology and occurrence XXXVl 125-136 Beshkov V. 1985 Arnphibia. Reptiles - in: Red Book of R. Bulgaria Vo1.2 Animals 32-41 Casc J-P et all 1997 Atlas of Amphibians and Reptiles in Europe Paris Soc Europe Herpetol and Mus.Nat.Hist Natur 1-493 for Bulgaria - Beshkov V. Beshkov B., K. Nanev 2002 Amphibians and Reptiles in Bulgaria Pensofi pp 1-120 Petrov B., P. Stoev, V.Beshkov 2001 Review of species composition and occurrence of Amphibians (Amphibia) and Reptiles (Reptilia) in the East Rhodopi Beltcheva, M., R. Metcheva. 1996. Methods for estimation the food eaten, the place and functional role of small mammals in ecosystems. "National Parks and their role in biodiversity protection on Balcan Peninsula.", Ohrid, 143 -1 46 Metcheva, R., A. Artinian, E. Nikolova, M. Belcheva, R. Laleva. 1997. Estimation of environmental quality using monitor species small mammals from two regions with different antropogenic influence in Bulgaria. A. Bioaccumulation of toxic elements and their influence on some hystological and hematological indices. Ecomonitoring in Rozhen Srednogorie - Bulgaria. Theory and Practice-Ministry of Environment, SDC - Swiss Agency for Development and Cooperation. Sotia,I 13 - 1 19 Mecheva, R., M. Topashka-Ancheva, M. Belcheva, Tsv. Yordanova. 2004. Bio-indicator capabilities of small mammalians in zoological monitoring. Forest Engineer, l , v. l 0 (29): 135 - 143 Chassovnikarova T., R. Metcheva, K.Dimitrov. 2005. Microtus guentheri (Danford & Alston)

L , - -

Ne~kovtsi Dam Environmental Due Diligence Report

(Rodentla, Mammal~a): A B~oindicator Specles for Eestimatlon of Polymetal Dust Em~ssions Influence. Belglan Journal of Zoology 135 (2). 135-1 37

22 Environmental Due Diligence Report "Apnlts~ Small HPPS" (Yantra Catchment Area) - Omltofauna, 1999 - Team Leader R. Nlkolaeva

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REGULATION ACTS

Environmental Protection Act (State Gazette No.91125.09.2002, amendments & supplements as of 2007). Waters Act (State Gazette No.67101.09.1999, amendments & supplements as of 2006) Biological Diversity Act (State Gazette No. 77109.08.2002, amendments & supplements as of2007). Pisciculture and Aquaculture Act (State Gazette No. 41 124.04.2001 amendments & supplements as of 2006). Waste Management Act (State Gazette No. 8612003 amendments & supplements as of 2007). Regulation on the terms and procedure for Perfom~ance of Environmental Impact Assessments (Council of Ministers Decree 59107.03.2003, amendment & supplement of 01.2006). Forestry Act (State Gazette No. 12511997, amendments & supplements as of 2006). Act on Protection against Noise in the Environment (SG No.7412005, amend. and suppl. No.3012006) Air Purity Act (SG No.4511996 amend. and suppl. No.10512006) Red Book of the Republic of Bulgaria, vo1.2 - 1985 UN Convention on Preservation of the Biological Diversity (in effect in Bulgaria since 16.07.1996 - State Gazette No. 1911 999). Order No. PA-272103.05.2001 on the Categorization of Surface Waters in Water Bodies or Parts of Them - MoEW. Regulation No. 3101.04.2004 on Waste Classification (State Gazette No. 44125.05.2004). Regulation No. 0412126.02.2004 on the Minimum Labor Health and Safety Requirements for Construction and Erection Works (State Gazette No. 37104.05.2004). Council of Ministers' Decision 122102.03.2007 on Approval of a List of Protected Areas for Protection of the Wild Birds and the List of Protected Areas for Protection of the Natural Wildlife Habitats. Water Supply and Sewerage Service Regulation Act, 2005. Regulation No. 1312004 on the Operation of Dams and Related Facilities MoEW, MH, MRDPW. Regulation No. 9116.03.2001 of MH, MRDPW and MoEW on the Quality of Potable and Washing Water. Regulation No. 3116.10.2000 of MoEW, MH, and MRDPW on the Terms and Procedure for Exploration, Planning, Approval and Operation of Sanitary Protection Zones around Water Sources and Potable Water Supply Facilities, and around Mineral Water Springs Used for Treatment, Prophylaxis, Drinking and Sanitary Purposes. MoEW Regulation No. 5108.11.2000 on the Procedure and Method of Establishing the Networks and Activity of the National Water Monitoring System. MoEW Regulation No. 10/03.07.2001 on Granting of Permits for Waste Water Discharge in Water Bodies and Establishing of the Individual Emission Restrictions of Point Sources of Pollution. Regulation No. 6 on Environmental Noise Indicators - MH, MoEW (State Gazette No. 5812006). Regulation No. 7124.08.2005 on the Sanitation Requirements for the Health Protection of Community Environment MH, MoEW Regulation No. 1411995 amendments & supplements as of 2007 on Permissible Limit Concentrations in the Air of Settlements Regulation No. 26101.10.1996 (amendments & supplements as of 2007) on the Recultivation of Disturbed Lands, Amelioration of Low-Productive Lands and Utilization of the Humus Layer. Hazardous Substance Handbook - MoEW, 2003. Earth- and Rockfill Dam Dimensioning Rates 1986 Civil Engineering and Architecture Newsletter issues 1 and 6 Hydro-Engineering Facility Design Rates, Basic Principles, Ministry of Construction and Urban Development and Ministry of Energy, Civil Engineering and Architecture Newsletter - issue No. 1 111 985 Regulation on the Terms and Procedure of Assessing the Compatibility of Plans, Programs, Projects and Investment Proposal with the Subject and Purposes of Zone Protection (SG No.7312007)

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