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<br />Leonard Rice Consulting ~~'ater Engineers, Inc. <br />(303) 455-9589 / 2695 Alcott Street / Denve-, Colorado 8027 t <br />Povember 15, 1979 <br />b1r. Garv t•iyers <br />Energ}° Fuels Corporation <br />Box G <br />Steamboat Springs, Colorado 80477 <br />Re: t?ine Plan Change, Eckmar. Fark I;ine. <br />Dear Garv• <br />LPnn,t^: ^ <br />LPSIIP ~" B ^B^~ <br />Rr1hPl, _ . <br />At your request we have reviecred the mining plan dated <br />November 8, 1979 for any possible changes in tine desigr. <br />hydrology for Pond A. <br />The mining plan o:hich t•:e used in our August, 1979 hydro- <br />logic analysis led to an area ~•:eighted AD:C-II Curve <br />Number (CN) of 70.6 for the 1980 worst case year. The <br />finalized mining plan still has 1980 as the c•;orst case <br />year, but the area caeighted A.TSC-II CN is slightly lower <br />at 70.4. This small change is not significant, and makes <br />the hydrologic analysis already comaleted more conserva- <br />tive. <br />If you have any questions, please do not hesitate to <br />call me. <br />Very truly yours, <br />LEONARD RICE CONSULTING SLATER ENGIidEERS, 1NC. <br />i~ ` ~~ <br />Leslie H. Botham <br />P.E. 14387 <br />LHB/sw <br />307EFC04 <br />Hytl rology <br />Water Rights <br />Environmental Analysis <br />Urban Drainage <br />4MC lye <br />~~A~~~ <br />°o <br />