GENERAL37490

• Permit No: C1981041
• IBM Index Class Name: General Documents
• Doc Date: 8/15/2003
• Doc Name: Proposed Decision & Findings of Compliance for SL2
• From: Partial Phase I
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

Several maintenance items noted in the April 15, 2003 inspection report had been properly
addressed prior to the bond release inspection.
Based on observations made during the bond release inspection, observations and measurements
documented in prior inspection reports referenced here, and information included in the bond release
application, the Division concludes that CRDA-1 has been constructed and regraded in conformance with
the approved design. Further, no indications of mass instability have been noted in quarterly P.E.
inspections, or by the Division during regular monthly inspections or special focus OSM oversight
inspections. Only limited minor rill erosion has been observed, and the operator has taken appropriate
remedial measures.
Roadside Refuse Disposal Area (RSRDA)
The Roadside Refuse Disposal Area (RSRDA) has not been actively used for refuse disposal since 1981.
Upon cessation of disposal at the site, the outslopes of the pile were graded, and subsequently covered
with a 6 inch soil thickness and reseeded. Soil thickness revegetation test plots were installed on various
locations of the pile, and data from the test plots provided the basis for required refuse soil cover
thickness on CRDA-1, CRDA-2, and final reclamation of the RSRDA. The flat top of the pile was
approved for use as a supply storage yard.
In 2002, extensive final reclamation work was performed on the pile. The initial reclamation project
included installation of two terrace drains and final grading of the pile outslopes, and placement of
permanent soil cover, which was completed in the late spring. Final reclamation of the cover soiled
slopes, including extensive roughening, seeding, mulching, and rock distribution was completed in
November 2002. In addition, a new permanent upland diversion was constructed to route upland runoff
around the top and to the south of the pile, into Sediment Pond 9. Also, a new North Perimeter collection
ditch was constructed along the north side of the pile to direct drainage from the terrace drains into
Sediment Pond 8. Minor grading was completed on the top of the pile to direct runoff away from the
outslope, but final grading and reclamation of the top of the pile has not been performed and is not
required until 2004. The top of the pile has been excluded from the bond release request.
Pertinent mapping, cross-sections, compaction data, construction certification, and permanent diversion
certifications are included in the bond release application.
Adequate soil cover thickness (18 inches subsoil/topsoil combined) on the reclaimed slopes was
documented in a DMG inspection report of January 31, 2003.
Construction certification for the new upper diversion ditch is included in the 3rd quarter 2002 refuse area
P.E. certification by Jim Stover. DMG measurements of the new upper diversion ditch are documented in
the January 31, 2003 inspection report. The P.E. certification identified certain discrepancies between
the ditch design and the "as-built' configuration, but included documentation confirming the adequacy of
the as-built ditches. DMG measurements were consistent with Mr. Stover's certification, and the Division
concurs that the Ditch as constructed will safely convey the design flow. The new North Perimeter
Collection Ditch P.E. construction certification was prepared by Jim Stover, dated 612/03. DMG
measurements of this ditch are reported in the inspection report dated April 15, 2003.
Bench outslopes appear generally to be in compliance with design gradient and bench heights. DMG
measurements documenting compliance are presented in the inspection report dated April 15, 2003.
Construction design for the RSRDA did not include installation of an underdrain.
Several maintenance items noted and informational requests made in the inspection report of April 15,
2003, were adequately addressed prior to the bond release inspection.
Based on observations made during the bond release inspection, observations and measurements
documented in prior inspection reports referenced here, and information included in the bond release
Phase I Bond Release 17 August 15, 2003