APPCOR12591

• Permit No: C1980007
• IBM Index Class Name: Application Correspondence
• Doc Name: UNSUITABILITY ANALYSIS AND REPORT
• Media Type: D
• Archive: No

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817.102 Backfilling and Grading
33. ARCO Coal must revise its backfill grading plan to conform with the
recommendations presented within the report entitled "Report on Stability
Analyses and Recommendations for Reclaimed Surface Facility at the ARCO
Mt. Gunnison No. 1 Mine," prepared by Merrick and Company for ARCO Coal.
This report shall be included within the permit application and ~..
designated as exhibit 3.2.2.C, as Indicated by ARCO on page 3-24a of the
revised permit application.
817.111-117 Revegetation
34. Prior to August 1, 1981, ARCO Coal shall select, in consultation with
MLRD and OS11, appropriate areas to increase the size of the Dry lfeadow
reference area from 0.8 acres to 2.0 areas. These supplemental areas, as
we 11 as the dry meadow areas to be affected, shall be sampled by
September 1, 1981 for cover, production, and density using the methods
identified in the application for the baseline reference area survey.
The vegetation characteristics of the supplemental areas shall be
statistically compared to those of the corresponding affected area using
the procedures discussed in the application. All data and analyses shall
be submitted by December 1, 1981. Pending regulatory authority approval,
the existing and supplemental dry meadow reference areas shall then be
used as a single unit in all future sampling.
35. Following stockpiling, topsoil stockpiles that will not be redistributed
for five or more years shall be seeded with the proposed permanent seed
mix (excluding shrubs) and not the temporary seed mix.
36. Within 3 months of regulatory authority approval of the application, ARCO
Coal shall justify the use of tfie proposed shrub density success standard
of 1000 stems/acre, by providing the findings of the technical referen-
ces/sources used to establish this standard. If this density standard
cannot be adequately justified, then the applicant, in consultation with
the regulatory authority and OS11, shall develop appropriate, justifiable
shrub density success standards to be used in evaluating reclamation and
adjust the stocking densities for each shrub species to be planted so as
to allow meeting the alternative standard.
37. Within 8 months of regulatory authority approval of the application, ARCO
Goal Company, in consultation with C11LRD and OS11, shall develop mutually
acceptable success criteria for species diversity on reclaimed areas.