Ootischenia Pit No. 0925

Transcription

1 Ministry of Transportation and Infrastructure Geotechnical and Materials Engineering Southern Interior Region Columbia Street Kamloops, BC, V2C 2T3 Telephone: (250) Fax: (250) Ootischenia Pit No Location: The pit is located adjacent to Highway 3 immediately south of the Ootischenia Overhead at Castlegar. UTM coordinates for the pit are Zone 11, N, E. Ootischenia Pit is part of a glaciofluvial terrace associated with the Columbia River characterized by poorly graded sand and gravels. Legal Description: Remainder of Sublot 66, District Lot 4598, Plan X34, KD, Plan R 346. The area is held by the Ministry of Transportation under a Crown Land Act Section 16 Map Reserve as well as Ministry Right of Way. Gradation: The average gradation for samples obtained from May 2011 excavator test pits is as follows: Classification Average (%) Gravel ( mm) 42.4 Sand ( mm) 55.4 Fines (<0.075mm) 3.85 Based on visual inspection there is approximately 4% material larger than 75 mm within the suitability areas of the pit. The maximum rock size observed was 420 mm.

2 Wet Sieve Analysis Chart: PROJECT REPORT OF SIEVE ANALYSIS SUMMARIES PERCENT PASSING Project: Ootishenia Pit Investigation Project No.: 0 Sample Source: Ootshenia Pit Client: Sitkum Consulting Material: PIT RUN Date: May 30/11 Sample Information Percent Passing Test Pit Depth Bag # Pit Run Sieve Sizes (mm) (m) MAX MIN SD MEAN MEAN-2SD MEAN+2SD Aggregate Gradation Chart: % P a s s i n g Grain Size (mm) Test Pit 11-15, Depth 0 m, Bag # 0 Test Pit 11-16, Depth 0 m, Bag # 0 Test Pit 11-17, Depth 0 m, Bag # 0 Test Pit 11-18, Depth 0 m, Bag #

3 Summary of Test Pit Logs: 13 AGGREGATE LOG PROJECT: Ootischenia Pit Investigation SAMPLED BY: MD (SCL) PIT #: 925 METHOD: Exc Hitachi 300 DISTRICT: South Kootenay DATE: 30-May-11 TH / TP DEPTH (m) SAMPLE SOILS CLASS FROM TO BAG No. G S F M AX SIZE SAND TYPE 75mm - 150mm - 150mm 375mm 375mm F M C REMARKS NS Pit floor SP <1 <1 M Mostly sand NS SP-SM F Fine sand/silt, like Photos: , WP NS Pit floor SP <1 <1 M SP-SM < F Fine sand/silt Photos: , WP NS Small terrace, edge of pit floor SP <1 <1 M SP <1 <1 <1 M Clean gravel (native?) Photos: , WP NS Pit floor SP <1 0 F-M SP-SM F mostly fine sand Photos: , Wp SP-SM <1 <1 F-M Pit floor SP M Mostly medium coarse sand Photos: , WP SP <1 <1 M Pit floor; screened gravel on surface NS SP Mostly fine sand ESTIMATED GRADUATION ESTIMATED ROCK Photos: , WP NS Terrace, chunks of asphalt on surface SP-SM <1 <1 <1 F-M NS SP Mostly fine sand Photos: , WP606 75mm NS OB Terrace; overburden & organics GP <1 M-C Mainly gravels, good depth Photos: , WP NS OB Terrace; overburden, organics GP <1 M-C Good sandy gravels, like Photos: , WP 602 3

4 NS Terrace GP <1 M-C Good sandy gravels SP-SM F Mainly fine sand. Max size Photos: , 1608, WP NS OB Overburden/organics #1 GP <1 M-C Good sandy gravel #2 GP <1 <1 M-C Good sandy gravel Photos: , Wp NS OB Terrace, next to highway GP <1 <1 M-C Good sandy gravel NS GP <1 <1 M-C Good sandy gravel Photos: , WP NS Terrace GP <1 <1 M-C Good sandy gravel Photos: , WP 605 Aggregate Quality: Aggregate quality tests were performed in 2003 on pit run samples throughout the pit. A summary of this testing is as follows: TEST AVERAGE RANGE Degradation % Sand Equivalent % Granular Volume: Estimated Volume: 100,000 m 3 The proven volume has been determined by multiplying the surface area of the upper suitability boundary by an average depth of 5.0 metres. 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. A primary crusher capable of reducing all material up to 375mm x 450mm will be required. The crusher is recommended to be located near the area identified on the Pit Development Plan, with mining proceeding in a south/southeast direction as indicated. 4

5 Processed aggregate may be stockpiled where space permits to the west and to the south of the access road. Material should not be stockpiled in the area between the access road and the highway. Some minor 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. At the completion of mining, active pit faces shall be sloped to a minimum of 1 ½:1 with granular material. The pit contains some domestic water wells. Particular care must be taken to ensure contamination does not occur. A buried broadband cable line is located along the eastern edge of the pit to the north of TP (outside of suitability area). 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. Site Photographs: 2011 Test Pit

6 2011 Test Pit material 2011 Test Pit

7 2011 Test Pit material 2011 Test Pit material (sieved) 7

8 2017 development 2017 development 8

9 2017 development 2017 development 9

10 Proposed stockpile and crusher location Steven Lee Senior Aggregate Resource Specialist Proposed stockpile and crusher location 10