_GENERAL DOCUMENTS - C1981017 ‎(144)‎

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

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9
oI DEPARTMENT OF NATURAL RESOURCES
David H.Getches,Executive Director
MINED LAND RECLAMATION DIVISION
Ig�6 D"ID C. SHELTON, Director
i
Richard D.Lamm
Governor
January 23, 1985
MEMORANDUM
TO: Fred Banta
David Shelton
FROM: David Holm
RE: Recommended Settlement of NOV C-84-085
Mid-Continent Resources, Inc.
I. FINDING OF VIOLATION
On May 21 , 1984, Jim Herron, of the Mined Land Reclamation Division,
observed numerous problems with respect to protection of the hydrologic
balance in the vicinity of the Mid-Continent Resources prep plant
operation. A Notice of Violation, #NOV C-84-085, was issued which
cited 13 separate instances of failure to -nini;nize disturbance to the
prevailing hydrologic balance. The citations included examples of
failure to maintain sediment ponds and drainage ditches, failure to
pass drainage from disturbed areas through the approved sediment
control system, and failure to properly control oil and grease spills.
Three of the 13 problems cited were deemed inappropriate following a
presentation by the operator of information relating to hydrologic
conditions at the mine site immediately prior to and during the
inspection on May 21 . This information was compiled by the firm of
Wright Water Engineers. While this report has not been analyzed in
detail by staff hydrologists, several conclusions contained within the
report were accepted for the purposes of these hearings.
In general , it was accepted that Coal Basin experienced extremely heavy
snowfall accumulations during the winter months of 1984. Also,
basin-specific climatic data was presented which indicated that this
heavy snowpack melted almost entirely in the two weeks preceding and
the week during the inspection. Based upon the LOG Pearson method of
runoff analysis, which was performed specifically for Coal Basin, it
appears that, one week prior to the inspection, the peak flows from
runoff exceeded the amount expected from a 10-year 24-hour storm event
for three consecutive days.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]