REP12709

• Permit No: C1981038
• IBM Index Class Name: Report
• Doc Date: 12/16/1999
• Doc Name: INTEROFFICE MEMORANDUM BOWIE 1 MINE PN C-81-038 1998 ANNUAL HYDROLOGY REPORT
• From: DMG
• To: JOE DUDASH
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Deparlmem of Natural Resources
1313 Sherman 51., Room 215
DIVISION OF
Denver, Colorado 80203
Phone: [phone] MINERAL $
FAX: [phone] &
INTEROFFICE MEMORANDUM G E O L O G Y
DIVISION OF MINERALS AND GEOLOGY M EN I N GM A F 0 Y
Bit l Owens
Governor
TO: Joe Dudash
Greg E. Watcher
Executive Director
FROM: Mike Boulay M ~ Michael B. Long
Division Director
DATE: December 16, 1999
SUBJECT: Bowie No. 1 Mine, Permit No. C-81-038, 1998 Annual Hydrology Report
I have completed my review of the 1998 Annual Hydrology Report (AHR) and Mine Inflow Report
for the Bowie No. 1 Mine. For the majority of sample locations, the operator presents a discussion
of current monitoring data compazed to baseline values. With minor exceptions, it appears that
both surface water and groundwater quality has remained generally consistent with the baseline
levels.
For future AHR submittals, it would be helpful if the operator would present the baseline
information in the AHR. This would provide a quick reference to baseline data and would allow
for a simple means for deteanining trends in water quality. The current format presents minimum,
maximum, and average values. for the current monitoring year. It would be preferable if these
columns were replaced with baseline values.
The frequency of data collection was not in compliance with the approved monitoring plan. As
discussed in the specific comments below, the operator did not collect and/or report all of the
required monitoring data. The monitoring program was last revised by TR-24 in December, 1993. I
checked all revision files to ensure that what is contained in the permit document is the cturent
approved monitoring plan.
Mine inflow information was mapped and reported for the period of July 1,1997 through June 30,
1998. With the exception of mine inflow water quality, the mine inflow report was presented in
accordance with Stipulation No. 29. Stipulation No. 29 requires that pH, conductivity, and
temperature be presented for all measurable inflows. These data were not presented. However, due
to the nature of these flows (very low less than 1 g.p.m. for any significant period of time) it may be
difficult or even impractical to obtain water quality data. It would be appropriate to ask the operator
to provide an explanation for the lack of water quality monitoring for the reported inflows. All
other required inflow information was provided in the report. There was no reported discharge
from the mine and it does not appear that the quality and quantity of surface water adjacent to the
mine has been adversely affected.