HYDRO28197

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 7/28/2005
• Doc Name: 2nd Quarter 2005 DMRs
• From: Seneca Coal Company
• To: WQCD
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

JI
~'ENEC.4
Cos/ Company
July 21, 2005
RECEIVE®
Colorado Department of Health JUL 2 8 2005
WQCD-PE-B2
4300 Cherry Creek Drive South Olvinron of Minerals antl Gaoiogy
Denver, CO 80246-1530
RE: Quarterly Discharge Monitoring Report for Permit CO-0000221
Dear Sir or Madam:
Pursuant to the quarterly reporting requirements contained in Colorado
Discharge Permit CO-0000221 for the Seneca Mine Complex, enclosed find
the second quarter 2005 discharge monitoring reports for Points 002 to
006 and 008 to 017. In this quarter, no discharges occurred at Points
009 and 014. Intermittent discharges occurred at Point 011 and 013.
Construction of Pond 014 was completed in September 2001, no discharge
has occurred yet.
Due to winter snow, vehicle access to Points 004, 008, 009, 015, 016
and 017 was closed until May. Monthly visits in April were performed
by all-terrain vehicle or on foot.
One excursion of effluent limits occurred this quarter. A sample
collected on April 7 at Point 004 had a total recoverable iron value of
1.47 mg/1. The effluent limit is 1.0 mg/1. This discharge point was
receiving snowmelt at the time. It is suspected that this high iron
value is related to the relatively high total suspended solids value,
26 mg/1. Total recoverable iron values at this site were 0.23 mg/1 in
May and 0.10 mg/1 is June, indicating that the excursion was transitory
and that the discharge point is now in compliance.
Please contact me at 970-276-5209 if you have any questions.
Sincerely,
~J
Dennis Jo es
Hydrologist I
cc: Division of Minerals and Geology
Attn. Mike Boulay
1313 Sherman Street, Room 215
Denver, CO 80203-2273
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Seneca Coal Compa
Seneca Coal Company . P.O. Box 670 . Hayden, Colorado 81639
Telephone [phone] . FAX [phone]