Redeau Lake Pit No. 1947

Transcription

1 Ministry of Transportation and Infrastructure Geotechnical and Materials Engineering Southern Interior Region Columbia Street Kamloops, BC, V2C-2T3 Telephone: (250) Fax: (250) Redeau Lake Pit No Location: The pit is located approximately 5 km east of 150 Mile House via Redeau Lake Road and Moffat Lake Forest Service Road. Legal Description: Ministry of Transportation and Infrastructure Section 16 Map Reserve on that part of Section 6, Township 40; that part of the North ½, Section 31, Township 41; part of the Northeast ¼, Section 1, Township 42; and that part of Section 12, Township 42 all within the Cariboo District, containing ha more or less. UTM coordinates from the pit are Grid Zone 10, 5,772,375 Northing, and 578,000 Easting. Gradation: The average and range of gradations for samples obtained from the 2012 test pits (excluding TP 12-11) are as follows: Laboratory Samples Classification: Average (%) Range (%) Gravel ( mm) Sand ( mm) Fines (<0.075mm)

2 Oversize Field Estimates Classification: Average (%) Range (%) Boulders (>375mm) Cobbles ( mm) Cobbles (75-150mm) The maximum size rock observed was 400mm. The average and range of gradations for samples obtained from the 2018 test pits are as follows: Laboratory Samples Classification: Average (%) Range (%) Gravel ( mm) Sand ( mm) Fines (<0.075mm) Oversize Field Estimates Classification: Average (%) Range (%) Boulders (>375mm) <1 0 1 Cobbles ( mm) 0 0 Cobbles (75-150mm) 0 0 The maximum size rock observed was 100mm.

3 Sieve Analysis Chart: PROJECT REPORT OF SIEVE ANALYSIS SUMMARIES PERCENT PASSING Project: Redeau Lake Pit Project No.: Sample Source: Redeau Lake Pit Client: MoTI Material: PIT RUN Date: 2012 Sample Information Percent Passing Test Pit Depth Bag # Pit Run Sieve Sizes (mm) (m) TP TP TP TP TP TP TP MAX MIN SD MEAN MEAN-2SD MEAN+2SD PROJECT REPORT OF SIEVE ANALYSIS SUMMARIES PERCENT PASSING Project: Redeau Lake Project No.: 0 Sample Source: Test Pits Client: Sitkum Consulting Material: PIT RUN Date: Sample Information Percent Passing Test Pit Depth Bag # Pit Run Sieve Sizes (mm) (m) MAX MIN SD MEAN MEAN-2SD MEAN+2SD

4 Aggregate Gradation Charts

5 % P a s s i n g Grain Size (mm) Test Pit 18-01, Depth m, Bag # 312 Test Pit 18-02, Depth m, Bag # 636 Test Pit 18-03, Depth m, Bag # 311 Test Pit 18-04, Depth m, Bag #

6 Summary of Test Pit Logs (including Laboratory Results bolded in red) are located below: 1 of 2 AGGREGATE LOG PROJECT: Redeau Lake Pit SAMPLED BY: Al Mitchell PIT #: 1947 METHOD: Excavator DISTRICT: Cariboo DATE: Nov 21-22, 2012 TH / TP DEPTH SAMPLE SOILS CLASS ESTIMATED GRADATION FROM TO BAG No. G S F ESTIMATED ROCK 75mm M AX SIZE SAND TYPE 75mm - 150mm - 150mm 375mm >375mm F M C GP M C REMARKS Sandier at bottom of hole. GP 50.9/48.2/ GP M C Sandier at bottom of hole SP M C Sandier layers GP 51.7/48.0/ GP M C SP M C AC SP M C SP 49.3/50.1/ GP M C SP M C GP M C OB Overburden stockpile? OB w/ LB

7 2 of 2 AGGREGATE LOG PROJECT: Redeau Lake Pit SAMPLED BY: Al Mitchell PIT #: 1947 METHOD: Excavator DISTRICT: Cariboo DATE: Nov 21-22, 2012 TH / TP DEPTH SAMPLE SOILS CLASS ESTIMATED GRADATION FROM TO BAG No. G S F ESTIMATED ROCK M AX SIZE SAND TYPE 75mm - 150mm - 150mm 375mm >375mm F M C GP M C 75mm REMARKS Crush OB Fill, etc GP M C GP 52/45.3/ GM F SM /41.8/ GP F M SP M C 0.3m layer of gravellier sand at approx 4m, then sandier below. SP 27.7/71.8/ GP M C SP M C GP M C SP SP M C SP F Layer of coarser rock between GP and SP A 0.5m layer of fine SP at 1m depth. SP 36.8/61.5/ GP M C SP F GP M C SP F GP M C Test Pit LOG PROJECT: Redeau Lake Pit SAMPLED BY: Bryan James PIT #: 1947 METHOD: Excavator DISTRICT: Cariboo DATE: 08-Mar-18 TP DEPTH SAMPLE BAG No. Material Description ESTIMATED GRADUATION ESTIMATED ROCK 75mm SAND TYPE REMARKS FROM TO G S F M AX SIZE 75mm - 150mm - 150mm 375mm >375mm F M C Laboratory Gradation TP SP MC SP (G 34.2%, S 63.4%, F 2.4%) TP SP MC SP MC SP (G 22.3%, S 76.5%, F 1.1%) TP SP MC SP (G 41.9%, S 57.8%, F 0.3%) TP SP <1 0 0 MC SP (G 48.5%, S 50.6%, F 0.9%) 0.3 TP GP <1 0 0 MC GP (G 63.3%, S 35.8%, F 0.9%)

8 Aggregate Quality: A summary of aggregate quality tests performed on pit run samples from the pit are as follows: TEST AVERAGE RANGE Micro-Deval 13.9 N/A Sand Equivalent % 67 N/A Bulk Relative Density (Coarse) Bulk Relative Density (Fine) Absorption (Coarse) Absorption (Fine) Granular Volume: Estimated Volume 60,000m 3 The estimated volume has been calculated by mining the developed Suggested Mining Area to an average depth of 4 metres. Pit Development and Recommendations: A portion of the mining area has been 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 crusher is recommended to be located in the vicinity of TP12-03, as indicated on the Pit Development Plan. Mining is to proceed in a southeasterly direction. Processed aggregate may be stockpiled to the west of the production site where room is available. Cold decked logs from previous development may still be located in the Redeau Lake Pit. Logs may need to be moved in order to facilitate stockpiling. Slash piles may be present in the work zone. If present, the contractor will be responsible for their disposal via burning and a burning permit must be obtained from the Ministry of Forests, Lands and Natural Resource Operations. At the completion of mining, active pit faces shall be sloped to a minimum of 1 ½:1 with granular material. Reject material from aggregate production is not to be used to slope or infill pit faces without the prior approval of the Ministry Gravel Resource Manager.

9 Photographs: Material from TP Material from TP

10 Slash stockpiles in western area of pit, looking west, potential alternative aggregate stockpile area mid left of photo Potential crusher set up area and stockpile area, looking east

11 Smaller gravel noted in area adjacent to proposed crusher site Steven Lee Senior Aggregate Resource Specialist