ENFORCE21877

• Permit No: C1980001
• IBM Index Class Name: Enforcement
• Doc Date: 8/16/1990
• Doc Name: EDNA MINE C-80-001 ANNUAL HYDROLOGIC REPORT & JUNE 1990 NPDES REPORT
• From: MLRD
• To: PITTSBURG & MIDWAY COAL MINING CO
• Violation No.: CV1994016
• Media Type: D
• Archive: No

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MINED LAND RECLAMATION DIVISION
Department of Natural Resources
1313 Sherman St., Room 215
Denver, CO 80203
303 866-3567
FAX: [phone]
STATE OF COLORADO
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Roy Romer,
Governor
Fred R. Banta,
Division Director
August 16, 1990
Mr. David Beverlin
Resident Engineer
The Pittsburg and Midway Coal Mining Company
P.O. Box 176
Oak Creek, CO 80467
RE: Edna Mine, C-80-001, Annual Hydrologic Report and June 1990 NPDES Report
Dear Mr. Beverlin:
Enclosed is a water analysis report of samples taken on May 9, 1990.
The June and July NPDES Reports indicate that water quality levels are met in
this report. Only DMP's 003 and 006 discharged during this period. The
report appears to be in compliance with the permit application.
The Annual Hydrologic Report from 1989 was reviewed and found to be complete.
The following comments result from this review.
1.. The beaver dam building activity has impaired proper stream flow reading
at Tr-B. Please consider a course of action to rectify this situation.
Modification of the current hydrologic monitoring program will require a
technical revision. This modification is expected this fall in order to
reestablish full compliance with ii~e water monitoring program in 1991.
2. Review of water quality parameters indicate little change over the
previous years' results. An apparent general temperature increase is
noted for the Trout Creek System. This anomaly is currently
unexplained. From measurements at Tr-A, stream flows are generally lower
in 1989. While this will negatively impact dilution, it is not the
answer for the general temperature increases since 1981. Trout Creek,
upstream from the Edna Mine, has a calcium bicarbonate type water with an
average TDS of 146 mg/1 with a pH of 7.9. As the water progresses
downstream past the Edna Mine, sulfates dramatically increase, becoming
the predominate cation. The average sulfate level for 1989 was 382 mg/1
at a pH of 8. The average TDS at TR-D is 693 mg/1.
In 1990 the Division sampled a spoils springs south of the South of Shop
Slide: Its flow was about 20 gpm with 1702 mg/1 level of sulfate at a
calculated TDS level of 2510 mg/1. The S.A.R. level was 0.14.