HYDRO28488

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 9/15/2004
• Doc Name: Amendment No. 1 to CDPS Permit No. CO-0027146
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

Snowcap Coal Co. lnc WWTF Water Quality Assessment CO-0027146
The Basic Standards and Methodologies for Surface Water, Regulation 31, CDPHE, WQCC,
Effective October 30, 2001.
Antidegradation Sign f cance Determination for New or Increased Water Quality Impacts,
Procedural Guidance, CDPHE, WQCD, December 2001.
Memorandum Re: First Update to Guidance Version 1.0, WQCD, Apri123, 2002.
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Appendix A Page 12 of 12 Last Revised 9/15/2003