HYDRO27500

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 10/29/2001
• Doc Name: 3rd QTR 2001 DMRs
• From: SENECA COAL CO
• To: WQCD
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

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RECEIV~~
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Coa! Company p~yis+onolP•~+ns~°s& Seneca Coal Company
October 23, 2001
Colorado Department of Health
WQCD-PE-B2
4300 Cherry Creek Drive South
Denver, CO 80222-1530
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 third quarter 2001 discharge monitoring reports.
for Sites 002 to 006 and 008 to 017. In this. quarter,
intermittent discharges occurred at 'Points 005, 011; 012, and
015, while no discharges occurred at Point 009. Points 013 and
017 have not been constructed yet'. .Construction of Pond 014 was
completed this September, no discharge has occurred yet.
Point 003 experienced an excursion of the 30-day. average total
suspended solids (TSS) limit of 35~ mg/l. with a value of 38 mg/1
measured from a sample collected September 12. A retest of the
September 12 sample performed on. October 10 resulted in a
measured TSS value of only 8 mg/1. Field notes recorded at the
time of sampling indicated that this sample contained a high
concentration of algae. I suspect that it was this high algae
concentration that resulted in this high TSS value. The October
10 retest value seems to indicate that this may be the case. TSS
values at this point were 12 mg/1 in. July, 30 mg/1 in August
(also high in algae), and < 5 mg/1 in October.
Please contact me at 970-276-5109 if you have any questions.
Sincerely,
~~~~
Dennis Jones
Hydrologist I
,/ cC: Division of Minerals and Geology
~~~/// Attn. Mike Boulay
1313 Sherman Street, Room 215
Denver, CO 80203-2273
Seneca Coal Company P.O. Drawer D Hayden, Colorado 81639
Telephone [phone] FAX [phone]