2011-05-31_HYDROLOGY - C1981010

• Permit No: C1981010
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/31/2011
• Doc Name: Review of 1st Quarter 2011 DMRS ‎(CO-0032115)‎
• From: DRMS
• To: Trapper Mining, Inc
• Permit Index Doc Type: DMR’s
• Email Name: RDZ
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
May 31, 2011
Graham Roberts
Trapper Mining, Inc
P.O. Box 187
Craig, CO 81626
COLORADO
D IV IS I ON OF
RECLAMATION
MINING
4() SAFETY
John W. Hickenlooper
Governor
Mike King
Executive Director
Loretta E. Pineda
Director
RE: Trapper Mining, Inc., Permit C-81-010
Review of First Quarter 2011 Discharge Monitoring Reports
for CDPHE Permit No. CO-0032115
Dear Mr. Roberts:
The Colorado Division of Reclamation, Mining, and Safety (Division) has reviewed and found the
above referenced report to be in compliance with Rule 4.05.13(2). The Discharge Monitoring Reports
were received by the Division on April 26, 2011. The reports cover the time period from January 1,
2011 through March 31, 2011.
Seven NPDES outfalls discharged during the first quarter of 2011. Outfall 001 (Johnson Gulch),
Outfall 002 (No Name Gulch), Outfall 011 (East Pyeatt), and Outfall 020 (Middle Flume) discharged
routinely throughout the quarter. Three other outfalls discharged during the quarter in response to
snowmelt events in March: Outfall 13 (West Pyeatt), Outfall 017 (Oak Gulch), and Outfall 021 (East
Middle Flume).
No exceedances of effluent limitations occurred during the quarter.
Outfall 011 and Outfall 020 were sampled for WET analyses during the quarter, and all tests passed
with LC50 exceeding 100 percent for both test species.
If you have any questions feel free to contact me at [phone], extension 8113.
Sincerely, r .?? fflf?
Robert Zuber, P.E.
Environmental Protection Specialist
Office of Office of
Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines