_ENFORCEMENT - C1981017 ‎(9)‎

• Permit No: C1981017
• IBM Index Class Name: Enforcement
• Doc Name: Bid Documents ‎(IMP)‎ CV-91-023
• Violation No.: C-91-023
• Media Type: D
• Archive: No

- 7 -
Additional Concerns and Suggestions
- Several approaches to revegetation of the various challenging sites at
Coal Basin were discussed. It was noted that several native species had
volunteered on steep, high elevation disturbances and were prevalent on
natural shale slopes . The dominant species were a robust bunchgrass
which has not been positively identified, and a soecies of Senecio,
soecies unknown. Collection and use of seed frcm these species might
significantly benefit revegetation efforts . Possible use or testing of
chemical soil stabilizers , Biosol amendment and various mulch treatments ,
in addition to the straw mulch with plastic netting treatment utilized on
the test plots was discussed. The possibility of spreading lodgepole
pine slash from Forest Service timer cuts on certain disturbed sites was
mentioned.
- It was noted that the final reclamation plan for the portal sites was
somewhat general . Post mine contour maps with sufficient cross sections
to depict existing and final reclamation topograohy for each of the
various portal and bin pad sites will be necessary.
- Given the fact that much of the Coal Basin site was disturbed pre-law, no
topsoil was salvaged. The relative advantages and disadvantages of
borrowing topsoil from undisturbed sites for use on selected reclamation
areas was discussed , without resolution.
- Haul and access roads , as well as traveled areas of the portal benches
may need to be gravel surfaced to minimize rills and ruts .
- The extreme variability of weather conditions from site to site within
Coal Basin was observed and discussed. Installation of weather stations
at each of the portal sites and various other locations is recommended.
- An estimate of the sediment storage capacity vs deposition rate for the
Mine 1 and Arctic Circle BAT ponds , as well as other proposed haul /access
road structures will be needed to assess maintenance needs , effectivness ,
and optimum size .
- Cattle have heavily grazed road cuts and fills in some areas , and were
observed on newly revegetated portions of the old coal refuse pile . Both
coal refuse piles should be fenced to keep cattle out. The problem of
cattle congregation along the roads is less easily addressed .
DTM/yjb
Enclosure(s)
8339F