1999-05-14_GENERAL DOCUMENTS - C1981017

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 5/14/1999
• Doc Name: Bid Documents ‎(IMP)‎
• Permit Index Doc Type: General Correspondence
• Media Type: D
• Archive: No

5TATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver,Colorado 80203 D I V I SION OF
Phone:[phone] MINERALS
FAX:[phone] &
GEOLOGY
RECLAMATION
MINING-SAFETY
MEMO Bill Owens
Governor
Greg E Walcher
TO. David Buckner Executive Director
Michael B.Long
FROM: Steve Renner Division Director
DATE: February 19, 1999
RE; Draft Report - Comments on Revegetation at the Coal Basin Mine
Jim McArdle, Dave Bucknam, Cheryl Linden and myself have all reviewed the draft report and
provide the following comments. We would like to have a final Draft by March 12, 1999. Please let
me know whether this is feasible.
There are several issues which we would like you to address, to the extent you are able to do so.
1) It would be helpful for you to include in your report a more detailed introduction, including a
specific description of the site conditions you observed, the extent to which the steepness of
the mine bench outslopes is due to the deposition of overcast materials in these locations; the
degree of surficial instability, which is expressed as erosion on the slopes; the extent to which
instability may be controllable by establishment of vegetative cover; the extent to which
establishment of vegetative cover is feasible, given MCR test plot data and given the
Division's revegetation demonstrations at various locations. Please address the degree of
necessity to accomplish revegetation, given ecological considerations, permit obligations an('
whether revegetation of the mine bench outslopes and road cut and fill slopes should be
undertaken using the best technology and practices applicable to the site and conditions,
given all of the above factors.
2) Please provide a more exhaustive explanation regarding the difficulties of high altitude
revegetation, particularly at highly disturbed sites. Please include in your discussion the
feasibility of achieving a reasonably successful vegetative cover and whether the Division's
revegetation demonstrations show signs of success.
3) The points made in Items 1 and 2 above were briefly touched upon in the draft report. Please
expand upon those discussions in the body of the report, again given your experiences and
site conditions as a basis for these conclusions.
4) Where you agree with our revegetation procedures, please clearly state so. When you
disagree with either the "Lewicki or Savage Reports", please clearly state so. It would be
helpful for you to briefly summarize or restate the pertinent portion of the "Lewicki or Savage