2013-03-21_REPORT - M1980244 - Laserfiche WebLink

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cc &v amee Tree /Slash Clearing, Chipping: Seed Masters continues to 'grind and chip' stockpiled trees and brush within the ADR, east of HWY 67 left of the ADR haul road. Equipment (Seed Masters): one "Chipper, one CAT 330 Excavator B) Underground Workings During the reporting period exploratory excavation and remediation were performed on UG Working No. 6038, No. 6039, No. 6040, No. 6041, No 6042, No. 6043, No. 6044, No 6045 and No. 6056. The sites were excavated to practical refusal into rock to a depth of 9 feet to 20 feet. The site for each working was then backfilled in 2 foot loose lifts to approximate planned subgrade elevation using the onsite structural fill (excavated material) and 'bucket tamped" with the back of the CAT 330 excavator bucket. All backfill material was free of organic material, ice and snow. UG #6037: Exploratory findings indicate this is a collapsed shaft. Timbers were observed and removed from 12 feet to 22 +1- feet. Confirmatory drilling was performed. 31 drilling locations were established encompassing UG #6037. All locations were placed on 4 foot centers. Confirmatory drilling commenced using one Sandvek 800 track drill rig and one Sandvek 700 track drill rig. Work will continue to encompass the working and to locate and isolate the void found. UG #6051 (Historical #55): Visual findings indicate the working is a timbered shaft estimated to be 10 feet in length by 5 feet in width. Confirmatory drilling was performed. A total of 23 drilling locations were established and placed on approximate 4 foot centers. 9 drill locations were completed to 50 and 51 feet. Voids were found in 3 drill locations ranging in depth from 43.5 to 45 feet and extending to a depth of 50 to 51 feet. Work will continue on the remaining drill locations and additional drill locations will be established to further investigate and isolate the void. During the reporting period, Underground working No. 6018 was blasted for further exploratory investigation. Underground working delineation drilling and investigations and remediation continue. C) Highway 67 MHT #2 is in place and is working properly. No other work was performed for the existing HWY 67 crossing during this reporting period. II) Storm Water Management A) Best Management Practices (BMP) are being performed. Inspections continue and there have been no issues identified. CQA ACTIVITIES: I) Field Activities: Construction activities and observation of clearing and grubbing, structural fill and compaction, underground workings, HWY 67 progress observation were some of the tasks performed in the field as required to project specifications.. II) Laboratory Activities: Laboratory testing continued (Particle Size Distribution, Atterberg Limits, Moisture- Density, gradations and material identifications) were some of the laboratory testing performed during this reporting period as required to project specifications. Page 2 of 6 MLE2 WE 03.02.13.doc