_INSPECTION - C1982057 ‎(33)‎

• Permit No: C1982057
• IBM Index Class Name: INSPECTION
• Doc Name: Inspection Report
• Inspection Date: 10/14/2009
• Email Name: DTM
• Media Type: D
• Archive: No

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III. COMMENTS-COMPLIANCE
Below are comments on the inspection. The comments include discussion of observations made during the
inspection. Comments also describe any enforcement actions taken during the inspection and the facts or
evidence supporting the enforcement action.
culvert and properly regrade the re-disturbed location will be excluded from the Division's
proposed approval decision for SL-2.
Backfill & Grading/Permanent Channel Construction&Functioning/Erosion and Slope
Stability
Lands subject to the SL-2 release request included final graded areas in both the original permit
area and the South Extension,but for reasons addressed previously in this report, the Division's
proposed approval will exclude the entire South Extension area. As a result, SL-2 detailed
observations and backfill and grading evaluation for SL-2 were limited to the original permit
area. Reclaimed watersheds subject to bond release request were walked during the inspection,
and observations were made with regard to approximate original contour, extent of erosion and
apparent stability of the reclaimed landscape. Postmine drainage channel stability was assessed,
and most permanent channels were walked along their entire length.
Based on observations made during and prior to the SL-2 inspection, the Division's general
conclusion is that reclaimed areas within the original permit area have been restored to the
approximate original contour of the pre-mining landscape. The present surface configuration
achieved by backfill and grading of the mined areas closely resembles the general surface
configuration of the land prior to mining. Highwalls have been eliminated, and reclaimed areas
blend in well with adjacent undisturbed slopes. Comparison of surveyed "original ground" and
"reclaimed" cross-sections (N1,N2, and S1 through S6) depicted on Exhibit C of the SL-2
application supports the conclusion that the general configuration of the original landscape has
been approximated. Approved permanent drainages in the original permit area depicted on
Permit Exhibit 20-2 "Postmining Topography and Drainage Map", and listed in the Permit
Attachment 20-1-1 "Postmine Channel Design Summary"have been constructed. Comparison
of the Post-mining Topography Map (Exhibit 20-2)to pre-mining topography as depicted on
permit Exhibit 7-6 "Drainage Basins", indicates that most pre-mining drainages were constructed
in their approximate original locations. In the original permit area, these drainages included 005
Gulch and its main tributary 005-E1; and 006 Gulch and its tributaries 006-NEI, 006-NE2, 006-
El, and 006-SE1. Subsequent to original permit issuance, several other designed permanent
tributary drainages were approved through revisions to the permit, including 005-W1, 006-Sl,
006-NE3, and 006-NE4. Additional tributary drainage channels have been"field fit" in
accordance with provisions of the approved rill and gully repair plan, in locations where
concentrated flows on the reclaimed landscape resulted in incipient channel formation.
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