2009-07-15_REVISION - M1980244 ‎(23)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 7/15/2009
• Doc Name: QA Mon. & Test Results Load Out- Bin Location
• From: CC&V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

•
C]
L1
Cripple Creek & Victor Gold Mining Company
Cresson Project
Quality Assurance Monitoring and Test Results
Load Out Bin Relocation
July 7, 2009
¦ Caterpillar 330 Trackhoe (2);
¦ Caterpillar 375 Trackhoe;
¦ Caterpillar 385 Trackhoe;
¦ John Deere 850 Rubber Tire Backhoe;
¦ Komatsu 800 Trackhoe;
¦ Volvo A40D Haul Trucks (8);
¦ T360 Forklift
¦ Caterpillar 777 Haul Trucks (6); and
¦ Tamrock 700 and 1100 Drill Rigs (6 total).
amecs
Table 2 presents a summary of the weather during the period of April 3rd through May 6th, 2009
for the LOB relocation construction activities.
2.1 Underground Workings Remediation
Historic underground workings within the footprint of the LOB were remediated following the
recommended remediation plans presented on Drawing No. A290 of the IFC Drawings.
The majority of underground workings (listed on Table 3) were removed during site grading
activities. Only one working required remediation. This working (No. 2019 located at N 54641.4
and E 37585.9) consisted of a shallow shaft (approximatel 25 feet) with two small adits.
Exploratory drilling was conducted around the shaft to a minimum depth of 50 feet. The results
of the drilling determined that the adits did not extend beyond 5 feet from the shaft edge. This
working was remediated by removing the crown pillars of the adits and loose rock with a track
excavator. Once the loose rock was removed, the working was inspected by the Certifying
Engineer and then backfilled following the shallow shaft remediation presented on Drawing No.
A290.
All exploratory drillholes that did not intercept underground workings were completely grouted
with bentonite slurry prior to remediating the working.
2.2 Site Grading
Prior to SF placement, Ames conditioned and compacted the subgrade surface of the fill area.
AMEC monitored the preparation of the subgrade and verified that it met project specifications.
SAPROJECTS11125E CCV CQA\H3 - CONSTRUCTIOMLOB CERT REPORT\REPORT BOD`I\LOB CERT REPORT 2009.07.07.DOC
6