2011-09-09_REVISION - M1981185 ‎(43)‎

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 9/9/2011
• Doc Name: Response to Fifth Adequacy Letter
• From: R Squared, Inc.
• To: DRMS
• Type & Sequence: CN1
• Media Type: D
• Archive: No

Mr. Wallace H. Erickson
Response to August 22, 2011 Cazier Memorandum
September 9, 2011
Page 10
Response to Adequacy Issue No. 14.
Wildcat intends to perform a geotechnical and engineering analysis to
demonstrate the stability of the cut and fill slopes and pond slopes at the Augmentation
Pond. To clarify this intent, Wildcat will add the following bullets after the third bullet
in the Construction section at Page 3 of Attachment D -6:
• In order to confirm the stability of the cut and fill slopes and pond slopes at
the Augmentation Pond, and to assess the need for any improvements to
further stabilize these slopes, Wildcat will implement a geotechnical work
plan consisting of performing a review of existing data, subsurface
investigation, laboratory testing, engineering analysis, conclusions regarding
site stability, and design criteria recommendations. Specifically, Wildcat will
perform the following:
o Drill six test borings to 20 feet or refusal at the approximate
locations shown in Figure 6.5 -1. An engineer /geologist will log
the borings and obtain relatively undisturbed, bulk samples of the
materials encountered. Samples will be inspected to confirm field
classifications and for laboratory testing;
DEN 97, 591, 786v1 9 -9 -11
o Selected samples will be transported for laboratory testing
including moisture content, dry density, strength, classification,
grain -size distribution, and compaction tests;
o Perform engineering and geologic evaluations to develop
conclusions and recommendations regarding the following:
• Suitability of onsite materials for construction of
augmentation pond liner;
• Stability of cut and fill slopes and pond slopes, including
slope stability analyses addressing a) empty /dry
conditions, b) full capacity conditions, and c) rapid draw
down conditions for any embankment design to impound
water with slopes greater than 3H: 1V;
• Design for methods to stabilize cut and fill slopes and
pond slopes, as necessary.
o Prepare a technical memorandum summarizing the results of the
work described above.
GREENBERG TRAURIG, LLP • ATTORNEYS AT LAW • WWW.GTLAW.COM