HYDRO21819

• Permit No: C1981019
• IBM Index Class Name: Hydrology
• Doc Date: 4/20/2001
• Doc Name: Request for Alternative Limits
• From: KENNECOTT ENERGY COLO COAL CO
• To: WQCD
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

Colowyo Coal Company, L.P.
5731 Sole Highway 13
~- Meeker, Calondo 81641
(970) 8241531
[phone] FAX
Kimberley A. Wolf
EnvironmenW Engmeer
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Ms. Carla Lenkey
Colorado Department of Public Health and Environment
Water Quality Control Division
4300 Cherry Creek Drive South
Denver, CO. 80222-1530
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RE: DMR REPORT FOR COLOWYO COAL COMPANY L.P.;
COLORADO WASTE WATER DISCHARGE PERMIT SYSTEM NUMBER
CO-00045161;
REQUEST FOR ALTERNATE LIMITS
Dear Ms. Lenkey,
Colowyo is submitting the First Quarter 2001 Industrial Discharge Monitoring Report (DMR)
to the Colorado Department of Public Health and Environment, Water Quality Control
Division. Discharges occurred at Outfa11005A, 006A, and OOIA.
Colowyo respectfully requests the Alternate Limits be applied to Outfalls OOSA, 006A, and
OOIA for an Active Mining Outfatl apply specific to snowmelt within a 24-hour period of less
than or equal to the 10-year, 24-hour event, totaling 1.8". Outfall OOSA exhibited increased
TSS. Outfall 006A exhibited increased Fe, TSS, and SS. Increasing temperatures also affected
Outfall OOIA on March 5, 2001, causing the discharge to increase in TSS.
The self-monitoring data for these three Outfalls are listed in the first quarter 2001 Discharge
Monitoring Report shown below:
Permit
Outfall Date Parameter Results Conditions
OOSA 2/21/01 TSS (mg/L) 120 35 (30 day avg)
TSS (mg/L) 120 70 (daily max)
006A 2/21/01 TSS (mg/L) 710 35 (30 day avg)
TSS (mg/L) 710 70 (daily max)
SS (mL/L/h) 1.5 0.5 (daily max)
Fe, tr (mg/L) 12.50 3.5 (30 day avg)
Fe,tr (mg/L) 12.50 7.0(daily max)
OOIA 3/5/01 TSS (mg/L) 100 35 (30 day avg)
TSS (mg/L) 100 70 (daily max)