REP33118

• Permit No: C1980001
• IBM Index Class Name: Report
• Doc Date: 4/25/2000
• Doc Name: 1999 AHR Review Memo
• From: DMG
• To: MIKE BOULAY
• Annual Report Year: 1999
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Naeural Resources
1313 Sherman 5[., Room 215
Denver, Colorado 80203
Phone: [phone]e7
FA%: [phone]
Internal Memorandum
TO: Mike Boulay
FROM: Sandy Brown
DATE: Apri125, 2000
RE: Edna Mine 1999 Annual Hydrology Report
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION
MINING•SAFETY
Bil I Owens
Governor
Greg E. Watcher
Executive Director
Michael B. Long
Division Director
It looks like you're the one to review! The Annual Hydrology Report (AHR) for the
Edna Mine was submitted on February 28, 2000 by Westem Water Consultants, Inc. In
November, P&M Coal Mining Company hired Western Water Consultants, Inc., to be in
chazge of [heir hydrology monitoring and reporting. The monitoring has been conducted
as required by the permit. Results are submitted in the AHR.
In addition to the AHR, P&M submits their NPDES monthly discharge monitoring
reports (DMR's) to the DMG. On three occasions last year P&M exceeded their sulfate
standard. Brian Gontarek from P&M has attributed the exceedances to the stringent
standards the mine is held to. The stretch of Trout Creek where the mine waters are
discharged is classified for drinking water. However, given the exceedances, I would like
you to take a look at the results. I have not contacted Water Quality Control Division
about these, (they also get copies of the reports) and they have not been in touch with us.
Do you think we need to discuss this situation with them? Copies of last years DMR's
are attached.
During the review of last couple of AHR's, it has been noted that TDS levels in the West
Ridge spoils well, WR-1 have exceeded the predictions made in the PHC. The PHC
predictions were 3000 mg/1(p. 2.5-101). The TDS levels reported in 1998 was a
maximum of 3898 mg/1 and in 1999 the maximum was 3530 mg/1. Copies of [he past
two reviews are attached. The PHC is located in Volume 3, Section 2.5.3, page 2.5-89 of
the permit application.
Also during the past couple of reviews, it has been reported that Well TR-1.5, (supposed
to be an upgradient alluvial well), has shown unexpectedly high TDS levels. P&M has
attributed this to an old underground mine upstream on Trout Creek. DMG agreed with
P&M's discussion that the cause for the increased salinity in TR-1.5 is unknown, but
certainly that high-salt groundwater will be migrating down-gradient and impacting the
other alluvial wells in a couple of years. As discussed above, the groundwater at the
West Ridge spoils well WR-1 exceeded the predictions of the PHC, so [hat, combined