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<br />e ~ HydroDynamics Incorporated <br />~~~~\ 19039E Plaza Dr., Sulte 253 <br />HydroDynamics P.O. Box 1327 Parker, co ao~34 <br />~~~~~ (303) 841-0377 <br />February 25, 1991 <br />Ms. Kathy Dolan <br />Colorado Department of Health <br />Permits and Enforcement Section <br />4210 East 11th Avenue <br />Denver, CO 80220 <br />RE: NPDES Permit far Coal Loading Facility <br />Dear Ms. Dolan: <br />~ : .. <br />i ~ '~~ i <br />,.., <br />-z ~.. - -- ~'"~1~J <br />Attached, you will find a completed NPDES Permit form for a coal loading <br />facility to be located West of Rifle, Colorado. Specific information <br />concerning the site, containment facility, drainage and discharge point have <br />been illustrated on the attached figures. <br />Since the containment pond has been designed to capture runoff water resulting <br />from a 10-year, 24-hour event or less, it is anticipated little flows will <br />leave the site. If significant runoff water is collected, it will stand in <br />the pond for at least 24 hours before being pumped into the drainage channel. <br />Prior to pumping, a water sample will be collected and tested for constituents <br />required by your department. Small amounts of water will be allowed to <br />evaporate and not pumped into the channel. <br />If any questions need answering, please do not hesitate to contact me. <br />Yours trua~~ <br />i <br />Jerald S. Fifield h.D. <br />Professional Hydrologist <br />JSF/jf <br />Attachment <br />Water Resources <br />Hydrolonlsfs • fnglneers • Planners <br />