122 Mile Pit No. 0687 · 122 Mile Pit No. 0687 2020 Technical Information Report 2 July 2020...

Ministry of Transportation and

Infrastructure

Geotechnical and Materials Engineering

Southern Interior Region 231-447 Columbia Street

Kamloops, BC, V2C 2T3

Telephone: (250) 371-3789

Fax: (250) 828-4083

122 Mile Pit No. 0687

2020 Technical Information Report

Location: The pit is located approximately 9.0 km northwest of the village of Lac La Hache then

0.5 km north of Highway 97 on Begg Road.

Legal Description: Ministry of Transportation and Infrastructure Section 16 Map Reserve legally

described as those parts of DL 2812, Lillooet District, containing 218.769

hectares, more or less. UTM coordinates for the pit are Grid Zone 10, 5597361

Easting, 5745855 Northing.

122 Mile Pit No. 0687 2020 Technical Information Report

2

July 2020

Gradation: The average and range of laboratory samples as well as oversize rock field

estimates for material from the 2004, 1999 and 1995 testing programs at 122 Mile Pit are as

follows:

Laboratory Samples

Classification Average (%) Range (%)

Gravel (4.75-75mm) 45.0 22.0 – 68.7

Sand (0.075-4.75mm) 51.3 28.7 – 75.0

Fines (<0.075mm) 3.7 1.1 – 6.3

Oversize Field Estimates


Boulders (>375mm) 0 0

Cobbles (150-375mm) 0.9 0 – 6

Cobbles (75-150mm) 4.0 0 – 12

Maximum rock size observed was 350 mm.

The average and range of laboratory samples as well as oversize rock field estimates for material

from the 2020 testing program at 122 Mile Pit are as follows:

Laboratory Samples


Gravel (4.75-75mm) 47.7 23.6 – 69.9

Sand (0.075-4.75mm) 47.8 31.9 – 66.6

Fines (<0.075mm) 5.5 1.7 – 16.8

Oversize Field Estimates


Boulders (>375mm) <1 0 – 1

Cobbles (150-375mm) <1 0 – 2

Cobbles (75-150mm) 1.5 0 – 4

Maximum rock size observed was 600 mm.


3

July 2020

Sample Information Percent Passing

Test Pit Depth Bag # Pit Run Sieve Sizes (mm)

(m) 75 63 50 37.5 25 19 12.5 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075

TP20-01 0 TP20-01 100.0 100.0 98.8 95.4 90.6 85.5 78.2 70.0 56.5 45.9 36.2 26.5 16.4 9.2 6.0

TP20-02 0 TP20-02 100.0 100.0 97.8 92.5 83.6 78.2 71.0 63.8 50.9 40.6 30.8 20.9 14.4 10.7 7.3

TP20-03 0 TP20-03 100.0 100.0 96.6 92.6 83.6 77.7 67.6 61.8 49.8 37.6 25.5 15.5 9.2 6.2 4.6

TP20-04 0 TP20-04 100.0 100.0 96.6 88.1 77.3 70.4 57.7 51.8 38.7 27.7 18.2 10.1 6.0 4.3 3.2

TP20-06 0 TP20-06 100.0 100.0 100.0 97.6 91.2 88.3 79.1 72.2 56.2 41.8 28.9 19.6 13.5 9.5 6.2

TP20-07 0 TP20-07 100.0 100.0 91.8 79.8 62.9 56.5 47.5 42.5 33.7 26.7 18.9 10.2 5.0 2.8 1.8

TP20-08 0 TP20-08 100.0 100.0 97.1 92.3 86.5 81.8 74.3 68.9 57.6 48.1 37.8 26.2 16.2 11.1 8.2

TP20-09 0 TP20-09 100.0 100.0 96.0 94.8 91.4 88.8 84.4 79.8 68.8 56.4 40.3 22.3 9.1 4.3 2.2

TP20-10 0 TP20-10 100.0 100.0 100.0 97.9 94.3 92.2 86.4 83.6 76.1 69.1 62.4 55.8 44.7 28.8 16.8

TP20-11 0 TP20-11 100.0 100.0 97.1 93.7 88.3 83.0 75.5 69.5 56.2 43.8 31.2 18.4 9.5 5.2 3.0

TP20-12 0 TP20-12 100.0 100.0 100.0 91.3 82.8 76.6 63.0 56.2 43.1 30.0 16.5 7.2 3.4 2.3 1.7

TP20-13 0 TP20-13 100.0 100.0 98.9 98.1 94.0 91.9 87.8 83.6 75.6 68.3 60.2 51.5 39.3 27.6 14.2

Sieve Analysis:

Aggregate Gradation Charts:


4

July 2020


5

July 2020

7537.525199.54.752.361.180.6000.3000.1500.075

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Grain Size (mm)

Test Pit TP20-01 , Depth 0 m, Bag # TP20-01Test Pit TP20-02 , Depth 0 m, Bag # TP20-02Test Pit TP20-03 , Depth 0 m, Bag # TP20-03Test Pit TP20-04 , Depth 0 m, Bag # TP20-04


6

July 2020

7537.525199.54.752.361.180.6000.3000.1500.075

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Grain Size (mm)


7537.525199.54.752.361.180.6000.3000.1500.075

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Grain Size (mm)



7

July 2020

Summary of Test Pit Logs (with results bolded in the chart):

PROJECT: SAMPLED BY:

PIT #: METHOD:

DISTRICT: DATE:

SAND

TYPEREMARKS

FROM TO G S F M AX SIZE75mm -

150mm

150mm -

375mm

>375m

m

F M C Lab Sieve (G/S/F)

0 1.3 19mm crush

1.3 4.7 TP2001 SP 33 62 5 90 1 0 0 F-M

0 4.8 TP2002 SP 38 57 5 290 1 1 0 F-M

0 4.5 TP2003 SP 42 55 3 320 1 1 0 M-C 50.2/45.2/4.6

0 4.1TP2004

GP 62 35 3 600 3 2 1 C

0 4.5TP2005

GM 45 35 20 450 1 1 1 M

0 4.3TP2006

SP 27 69 4 270 1 1 0 M

43.8/50/6.2

0 4.6 TP2007 GP 66 32 2 450 4 1 1 M-C Center, top of existing face

66.3/31.9/1.8

0 3.6TP2008

SP 33 59 8 110 1 1 0 M

42.4/49.4/8.2

Sluffing/caving in due to TP being dug

on sideslope of lower bench

TP2002

TP2003

TP2004

TP2005

Small clean gravel seam on SW side of

test pit

Small GP seam barely visible in NE

corner @ bottom of hole

687

South Cariboo (SA16)

Steven Lee

Excavator

TP2007

TP2008

SAMPLE

BAG NO.

TEST PIT

NO.

SOILS

CLASS

TP2001

18-Jun-20

The top ~1.3m is processed aggregate

froma past project. 43.5/50.5/6

49.1/43.6/7.3

61.3/35.5/3.2

TP2006

AGGREGATE LOG

DEPTHESTIMATED

GRADATIONESTIMATED ROCK 75mm

122 Mile Pit


8

July 2020

PROJECT: SAMPLED BY:

PIT #: METHOD:

DISTRICT: DATE:

SAND

TYPEREMARKS

FROM TO G S F M AX SIZE75mm -

150mm

150mm -

375mm

>375m

m

F M C Lab Sieve

0 4.2 TP2009 SP 18 80 2 100 1 0 0 M In the floor, near toe of face

31.2/66.6/2.2

0 0.8 GP 50 46 4 220 3 1 0 M

0.8 1.6 TP2010 SP 10 85 5

1.6 2.4 SM 5 60 35 23.6/59.4/16.8

0 4.5 TP2011 SP 32 65 3 520 1 1 1 M 43.8/53.2/3.0

0 2 TP2012 GP 10 85 5 0 0 0 C

2 4 SM 5 5 95

56.9/41.4/1.7

Water @ 1.6m, rock at bottom, couldn't

dig with cleanup bucket

SAMPLE

BAG NO.

SOILS

CLASS

ESTIMATED

GRADATIONESTIMATED ROCK 75mm

TP2009

TP2010

TP2011

TP2012

Small bench on south side, between

upper face and upper floor. Clay seams,

then CL at bottom

AGGREGATE LOG

122 Mile Pit Steven Lee

687 Excavator

South Cariboo (SA16) 18-Jun-20

TEST PIT

NO.

DEPTH


9

July 2020

PROJECT: 122 Mile Pit SAMPLED BY: AJ Mitchell

PIT #: 0687 METHOD: John Deere 690E LC Excavator

DISTRICT: Cariboo DATE: 01-Jun-04

TH / TP SAMPLESOILS

CLASS

SAND

TYPEREMARKS

FROM TO BAG No. G S FM AX

SIZE

75mm -

150mm

150mm -

375mm 375mm F M C (PHOTOS)

04-01 0.0 0.2 TS

0.2 2.0 GP 50 49 1 150 5 0 0 M

2.0 4.5 52583 GP 79 20 1 150 10 0 0 M C (1,2)

GP 58.2 40.7 1.1 Lab Results for 52583

04-02 0.0 0.2 TS

0.2 1.0 GP 50 49 1 150 1 0 0 F

1.0 3.0 SP 36 63 1 75 1 0 0 F M

3.0 6.0 52589 GP 50 49 1 150 1 0 0 M (3,4)

SP 43.5 52.0 4.5 Lab Results for 52589

04-03 0.0 0.2 TS

0.2 6.0 52225 GP 74 25 1 300 5 1 0 M (5,6)


04-04 0.0 0.2 TS

0.2 6.0 52569 GP 79 19 2 300 10 2 0 M (7,8)


04-05 0.0 0.2 TS

0.2 1.5 GM2 39 38 23 50

1.5 4.0 SP 19 80 1 50 0 0 0 F

4.0 6.0 52242 SP 29 70 1 75 0 0 0 F (9,10)

SP-SM 32.4 61.9 5.7 Lab Results for 52242

04-06 0.0 0.2 TS

0.2 1.0 GM2 39 38 23 50 0 0 0 F

1.0 6.0 52572 SP 39 60 1 75 0 0 0 F (11,12)


DEPTHESTIMATED

GRADUATIONESTIMATED ROCK 75mm


10

July 2020




TH / TP SAMPLESOILS

CLASS

SAND

TYPEREMARKS

FROM TO BAG No. G S FM AX

SIZE

75mm -

150mm

150mm -

375mm 375mm F M C (PHOTOS)

04-03A 0.0 0.2 TS

0.2 3.0 GP 74 25 1 300 5 1 0 M (13,14)

04-07 0.0 0.2 TS

0.2 6.0 52246 GP 79 20 1 150 5 0 0 M (15,16)


04-08 0.0 0.2 TS

0.2 6.0 52593 GP 71 28 1 150 10 0 0 M (17,18)

GP 51.5 47 1.5 Lab Results for 52593

04-09 0.0 0.2 TS

0.2 5.5 52555 GP 53 44 3 300 2 1 0 F (19,20)


04-10 0.0 0.2 TS

0.2 5.5 52208 GP 80 19 1 300 10 1 0 M (21,22)


04-11 0.0 0.3 TS

0.3 1.5 GM2 39 38 23

1.5 6.0 52207 SP 31 68 1 300 3 1 0 M (23,24)


04-12 0.0 0.2 TS

0.2 6.0 52599 SP 33 66 1 150 2 0 0 M (25,26)


04-13 0.0 0.3 TS

0.3 6.0 52235 GP 55 44 1 150 5 0 0 M (27,28)


04-14 0.0 0.3 TS

0.3 5.0 GP 61 38 1 150 10 0 0 M

5.0 6.0 52409 GP 63 36 1 300 10 3 0 M (29,30)


DEPTHESTIMATED

GRADUATIONESTIMATED ROCK 75mm


11

July 2020




04-15 0.3 5.0 GP 61 38 1 150 10 0 0 M

5.0 6 50479 GP 63 36 1 300 10 3 0 M (31,32)


04-16 0.0 0.2 TS

0.2 5.5 52412 GP 67 32 1 150 10 0 0 M (33,34)



12

July 2020

Aggregate Quality: A summary of aggregate quality tests performed on pit run samples from the tested

area are as follows:

TEST

AVERAGE RANGE

Degradation 62.7 45.3 – 85.1

Micro Deval (Fine/Coarse) 11.8/13.5 -

Sand Equivalent % 70.7 63.4 – 77.8

Bulk Relative Density

(Coarse)

2.709 2.687 – 2.720

Bulk Relative Density (Fine) 2.652 2.621 – 2.700

Absorption (Coarse) 1.40 0.94 – 1.76

Absorption (Fine) 1.68 1.37 – 2.08

Magnesium Sulphate

(Coarse)

8.35 7.04 – 10.49

Magnesium Sulphate (Fine) 14.28 10.50 – 19.29

Granular Volume:

Estimated Volume: 200,000m3

• The estimated volume has been determined by multiplying the surface area of the

suitability boundary by an average depth of 4 metres.


13

July 2020

Pit Development and Recommendations:

• The mining area has been previously developed by the Ministry of Transportation and

Infrastructure (MoTI). Any additional development will be the responsibility of the

contractor and shall be completed as per the pit development plan or as directed by the

Ministry Representative.

• The fence at the north end of the develop area of the pit must be replaced if it is removed for

development/mining.

• Aggregate gradation within the suitability area is highly variable and some material will have

to be rejected to access the more suitable aggregates.

• The crusher is recommended to be located as identified on the Pit Development Plan, with

mining proceeding in a northern or northeastern direction as indicated.

• Processed aggregate may be stockpiled to the south or southwest of the production site where

space permits.

• Clearing, grubbing, and stripping may be required prior to mining and aggregate stockpiling.

If additional development is required it shall conform to the requirements of the pit

development plan or be completed as directed by the Ministry Representative.

• Merchantable timber must be processed and decked in an accessible area of the pit.

• At the completion of mining, active pit faces shall be sloped to a minimum of 1 ½:1 with pit

run granular material.

• All reject materials resulting from aggregate production are to be placed in separate

stockpiles free from deleterious material and in an easily accessible location. No

stockpiling against the pit face is permitted without the permission from the Aggregate

Resource Manager.


14

July 2020

Site Photographs:

TP2003 (2020)


15

July 2020

TP2004 pile (2020)


16

July 2020

TP2007 pile, top of existing face (2020)


17

July 2020

TP2012 (2020)


18

July 2020

Developed area of 122 Mile Pit, facing southwest toward pit entrance. Note stockpile space is limited due

to presence of several existing stockpiles (Drone - June 2020)

Facing northeast, recommended crusher setup area and stockpile location to the south (Drone - June 2020)


19

July 2020

Facing west (Drone - June 2020)

Facing east side of Kokanee Pit Rd. TP 2012 on west side of road, overburden area on west side of road

(Drone – June 2020)


20

July 2020

Main pit floor area, crusher setup and stockpile space (Drone – June 2020)

Developed portion of pit face (Drone – June 2020)


21

July 2020

Undeveloped portion of pit to the north, fence is located at the boundary between the pit and the trees.

Slash piles are present in foreground. (Drone – June 2020)

Steven Lee

Senior Aggregate Resource Specialist

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122 Mile Pit No. 0687 · 122 Mile Pit No. 0687 2020 Technical Information Report 2 July 2020...

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