122 Mile Pit No. 0687 · 122 Mile Pit No. 0687 2020 Technical Information Report 2 July 2020...
Transcript of 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.
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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
Classification Average (%) Range (%)
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
Classification Average (%) Range (%)
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
Classification Average (%) Range (%)
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.
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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:
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7537.525199.54.752.361.180.6000.3000.1500.075
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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
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7537.525199.54.752.361.180.6000.3000.1500.075
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Test Pit TP20-05 , Depth 0 m, Bag # TP20-05Test Pit TP20-06 , Depth 0 m, Bag # TP20-06Test Pit TP20-07 , Depth 0 m, Bag # TP20-07Test Pit TP20-08 , Depth 0 m, Bag # TP20-08
7537.525199.54.752.361.180.6000.3000.1500.075
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Test Pit TP20-09 , Depth 0 m, Bag # TP20-09Test Pit TP20-10 , Depth 0 m, Bag # TP20-10Test Pit TP20-11 , Depth 0 m, Bag # TP20-11Test Pit TP20-12 , Depth 0 m, Bag # TP20-12
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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
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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
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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)
GP 61.1 35.9 3.0 Lab Results for 52225
04-04 0.0 0.2 TS
0.2 6.0 52569 GP 79 19 2 300 10 2 0 M (7,8)
GP 68.7 28.7 2.6 Lab Results for 52569
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)
SP-SM 27.6 66.1 6.3 Lab Results for 52572
DEPTHESTIMATED
GRADUATIONESTIMATED ROCK 75mm
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PROJECT: 122 Mile Pit SAMPLED BY: AJ Mitchell
PIT #: 0687 METHOD: John Deere 690E LC Excavator
DISTRICT: Cariboo DATE: 02-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)
04-03A 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)
GP 50.6 45.7 3.7 Lab Results for 52246
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)
SP-SM 38.0 54.1 7.9 Lab Results for 52555
04-10 0.0 0.2 TS
0.2 5.5 52208 GP 80 19 1 300 10 1 0 M (21,22)
GP 62.0 35.9 2.1 Lab Results for 52208
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)
SP-SM 25.2 67.0 7.8 Lab Results for 52207
04-12 0.0 0.2 TS
0.2 6.0 52599 SP 33 66 1 150 2 0 0 M (25,26)
SP 36.6 59.1 4.3 Lab Results for 52599
04-13 0.0 0.3 TS
0.3 6.0 52235 GP 55 44 1 150 5 0 0 M (27,28)
SP 35.0 61.0 4.0 Lab Results for 52235
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)
GP 54.9 43.2 1.9 Lab Results for 52409
DEPTHESTIMATED
GRADUATIONESTIMATED ROCK 75mm
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PROJECT: 122 Mile Pit SAMPLED BY: AJ Mitchell
PIT #: 0687 METHOD: John Deere 690E LC Excavator
DISTRICT: Cariboo DATE: 02-Jun-04
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)
GP 67.8 30.5 1.7 Lab Results for 50479
04-16 0.0 0.2 TS
0.2 5.5 52412 GP 67 32 1 150 10 0 0 M (33,34)
GP 61.7 36.9 1.4 Lab Results for 52412
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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.
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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.
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Site Photographs:
TP2003 (2020)
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TP2004 pile (2020)
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TP2007 pile, top of existing face (2020)
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TP2012 (2020)
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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)
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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)
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Main pit floor area, crusher setup and stockpile space (Drone – June 2020)
Developed portion of pit face (Drone – June 2020)
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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