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PONDEROSA ENGINEERING, INC. <br />CONSULTING ENGINEERS <br />REGISTERED LAND SURVEYORS <br />July 23, 1982 <br />Mr. Craig A. Shervood <br />Environmental Coordinator <br />P.O. Box 980 <br />Carbondale, CO 81623 <br />Re: Submittal of Final Plans - Drainage Area 13B <br />Dear Mr. Shervood: <br />Enclosed for your review are four prints of the above referenced <br />materials. Also enclosed are copies of my final drainage calcu- <br />lations. <br />The purpose of this plan is as follows: <br />• 1. To show how drainage off of the new haul road and <br />supply area axe handled and to size culverts and <br />ditches in these areas. <br />2. To show that the total area tributary to the refuse <br />area sedimentation pond is less than the 29 acres <br />used in the final design of the pond. <br />If you have any questions with regard to any of the above please <br />contact me. <br />Sincerely, ~ <br />Rick Kinshella, P.E. <br />1512 GRAND AVENUE, SUITE 22D <br />GLENWOOD SPRINGS, COLORADO 81601 (303) 945.6596 <br />