2015-12-03_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 12/3/2015
• Doc Name: Final Report, QA Monitoring & Test Results
• From: Cripple Creek & Victor Gold Mining Company
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

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Response:
All of the above noted figures have been revised to read "Structural Fill
used in remediation effort". This was a reference used in the field as to its
location, however it is the same material. There is no deviation from the
Technical Specifications. All figures in this section have been included in
the addendum.
ii. Note 3 on Figure UG27 states "25 CY of approved 4020 mix concrete and
45 CY of 300 psi mix concrete was placed as substitution for cemented
rockfill." This is not discussed in Section 7.2, Project Technical
Specification Deviations of the report. There is no mention of 4020 mix in
Appendix M.3. The "300 psi" mix is presumably flowable fill (spec no.
3330). Please provide justification for using unspecified material in place
of cemented rockfill.
Response:
There was an excess of flowable fill at that time, rather than waste the
material, it was used in place of cemented rockfill. In essence, another
concrete cap was placed with a lower compressive strength. Figure U27
has been revised to state "Approved 4001" mix, the mix that is shown in
Appendix M.3.
iii. Survey data graphic on Figures UG 11 and UG25 suggest three layers of
geogrid were placed, but the quantities listed on these figures indicate
only 2 layers of geogrid were placed. Please address this discrepancy.
Response:
Figure UG11 has been revised to reflect 3 layers of geogrid as well as the
area updated. Figured UG25 only has 2 layers of geogrid, however, there
are large areas of overlap and the southwest end is wider than the 38 feet
called out on the northeast end. The area is correct. Both figures are
included in this addendum.
c. Appendices M.7 and M.8: All the geogrid tests appear to be Tensar's UX180060
geogrid. The technical specification (2776.1) in Appendix E lists Tensar's
UC1800HS geogrid or equivalent. Unfortunately, the 2776.1 specification does
not specify values for two of the conformance tests performed and documented
in Appendix M.8
Response:
Amec Foster Wheeler contacted Tensar to confirm that UX180060 and
UX1800HS are the same product. Tensar uses UX180060 as a product code. A
note has been made in section 5.4 to indicate they are the same product and is
included with this addendum. The 2 percent and 10 percent testing provided in
Amec Foster Wheeler Environment & Infrastructure, Inc.
2000 S. Colorado Blvd., Suite 2-1000
Denver, CO 80222
Tel: [phone]
Fax: [phone]
amecfw.com Page 4