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United States Department of Agriculture <br />L <br />Natural Resources Conservation Service <br />Jim Boyd, Resource Conservationist <br />P O 90* 29 <br />Norwood, CO 81423 <br />March 8, 2010 <br />Division of Reclamation, Mining and Safety <br />Department of Natural Kesources <br />101 South 3 "1 Street, Suite 301 <br />Grand Junction, CO 81 iO l <br />Dear Concerned Parties: <br />iim. boyd (bco.usda.gov <br />970-327-4245-OFFICE <br />970. 327 - 4247 -FAX <br />At the request of the Morgan Fancily 1 have desigpied a sideroll sprinkler irrigation system using <br />NRC:S irrigation design criteria for approximately 97.5 acres of their property within the mine <br />permit boundaries of the New Horizon Mine, Western 1-ucls- Colorado. Looking at aerial <br />photography from 1973 and 1993, it is evident that a majority of the Morgan property was <br />irrigated and cropped. Ofthe 109 acres that has been or will be mined by Western fuels, I <br />estimate that at least 90% of it was historically irrigated for crop production. <br />The irrigation system design for the Morgan property requires four, quarter mile long, sideroll <br />sprinklers, and two pipeline manifolds to feed the sprinklers (see the enclosed plan map), The <br />irrigation systern will utilize 60 shares of Colorado Cooperative (CC) Ditch water, which equates <br />to approximately 1.64 cubic feet per second (cfs) during the month ormy. While in operation, <br />only two sideroll sprinklers will be running at the same time, one on each pipeline manifold, <br />unless more irrigation water is supplied to the system_ The sprinkler set, or run time, will be 12 <br />hours between moves, and the sprinklers will be moved once every 24 hours with all four <br />sprinklers having one 12 hour set in alternating fashion. fetich sprinkler is designed to utilize <br />0.82 cfs, while operating at near 35 pounds per square inch (psi) of water pressure. Please <br />review the enclosed Sideroll Sprinkler Design Worksheet for more details. <br />This proposed irrigation design provides the most ellicient and flexible system for the conditions <br />presented. location, soil type, crop(s) grown. available irrigation water, yield geometry, etc. <br />With proper managetnent, this irrigation system will adequately irrigate 97 5 acres of alfalfa with <br />60 shares of CC Ditch water. <br />There is tell a trapezoidal piece of land in the southeast corner of the Morgan property, <br />approximately H. a acres, that is not addressed by this irrigation system design. To irrigate this <br />area sufficiently, one would have to consider using other irrigation systems such as big -gun <br />sprinklers, hand set sprinklers, or gated pipe In addition, more irrigation water would have to he <br />supplied to the system to properly irrigation this acreage. <br />Tl�e NMtw.0l R.r..c�wt.0 Conservairm Scnv'"a woks in paltnet -,lisp ymti if- Ainotiran ptv("pk, <br />to ctM7atrve and E,ustnin natural r.:- „r,urces 00 rxrealu larXl. <br />Ali Egaal op"itintty Ftovtow And EmpkPK-t <br />Monday, March 08, 2010 (3).max <br />