PERMFILE47866

• Permit No: M1980244
• IBM Index Class Name: Permit File
• Doc Date: 9/3/2002
• Doc Name: Certifcation Report Phase IVa
• From: Cripple Creek & Victor Gold
• To: DMG
• Media Type: D
• Archive: No

• C. CONTRACTOR shall grade all excavations to ensure grades are maintained to provide
adequate drainage at all times. Work shall be suspended by CONTRACTOR when, in the
opinion of MANAGER and CERTIFYING ENGINEER, the site is overly wet, muddy, or
otherwise unsuitable for proper maintenance, until directed otherwise by MANAGER, at no cost
to CC&V.
D. In excavations where Structtrral Fill or Select Stmctural Fill is to be placed on slopes steeper than
3H:1V, horizontal benches shall be excavated into the slope to allow fill to be placed in
horizontal lifts. The CONTRACTOR shall continuously bench and key embanlmtent material
into the existing material a minimum of 2 feet.
E. The CONTRACTOR will be responsible for the safety of temporary construction slopes.
CONTRACTOR shall inspect all temporary and permanent open-cut excavations on a regulaz
basis for signs of instability. Should signs of instability be noted, CONTRACTOR shall
immediately undertake remedial measures and shall notify MANAGER immediately.
Permanent cut slopes shall be left in smooth, safe, and stable condition at the end of the workday.
F. CONTRACTOR shall fmal grade excavations within the valley leach facility to establish
positive drainage to the Pregnant Solution Storage Area. In no case will depressions or bowls be
permitted in the valley leach facility area.
G. CONTRACTOR shall conduct all excavation and shoring operations in compliance with
applicable MSHA, Colorado State and Federal government laws and regulations.
3.05 SUBGRADE:
• A. The MANAGER and CERTIFYING ENGINEER will inspect and approve the exposed
subgrade prior to any fill or Soil Liner being placed. CQA Monitor will confirm that the surface
of the subgrade is smooth and free of debris, grade stakes, angular rocks, roots, branches,
vegetation, mud, ice, or frozen material. If the subgrnde is determined to be frozen, using the
criteria identified in Item 3.06.10 of Section 2200, the CONTRACTOR may either remove and
replace the frozen subgrade or wait unfit subsequent temperature monitoring indicates the fill is
unfrozen, at no cost to CC&V. The subgrade shall have no sudden sharp or abmpt changes in
grade.
B. CONTRACTOR is responsible for maintaining subgrades in a condition satisfactory to
CERTIFYING ENGINEER. CONTRACTOR shalt protect prepared subgrades, including
previously approved subgrade, from weather, construction equipment, or other factors as outlined
in Part 3.06 of the SPECIFICATIONS. Subgmde surfaces, including previously approved
subgrade, that become softened or otherwise unsuitable for placement of fill, shall be repaired to
CERTIFYING ENGIiYEER's and MANAGER'S satisfaction, at no cost to CC&V.
C. Prior to placement of fill materials, CONTRACTOR shall scarify all m-situ materials [o a depth
of 6-inches, moisture condition, and recompact the subgrade. Compac6ve effort shall be
adequate to obtain a minimum of 95 percent of maximum dry density as determined by the
standazd Proctor test (ASTM D698) for the particulaz fill material Moisture conditioning shall
be adequate to achieve a uniform moisture and density. In rock areas, the CONTRACTOR
shall prepaze the subgrade by removing loose rock fragments until competent foundation material
is encountered as approved by CERTIFYING ENGINEER.
D. If the underlying material is unsuitable to pemilt proper compaction of the subgrade,
CONTRACTOR shall loosen, aerate (or excavate and remove), and recompact the subgrade
. until the top layer can be compacted as required. The recompacted surface shall then be
scarified, as needed, to provide a good bond between the foundation and fill materials.
Section 02200 Page 6 of 17 March 22, 2000
Earthworks Golder Associates Revision 7
1:1W~3203Wi00~CF.RTREP0602W PPEND5~,1PPEb2300R] DOC