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OGJ8t.:3 M~!1QRaNDU!1 TO: Gene Jencsok Dan Merriman File Steve Boand /Iff FROM: DATE: June 6. 1986 RE: Wilderness Instream Flow APpropr,iation List The attached lists show the 305 instream flow appropriations held by the Colorado Water Conservation Board in existing and candidate wilderness areas. These lists were developed by Mr. Jim McDanold (of the State Engineer'S Office) and me by locating all instream flow appropriations made by the CWCB as of December 31, 1985 on U.S. Forest Service maps. The lists show only those instream flow appropriations that begin in wilderness areas. Stream segments that started just outside a wilderness or proposed wilderness area were not included. Those appropriations would however provide protection for those wilderness streams since water would be pulled through the wilderness to meet a downstream instream flow call. It should also be noted that not all the appropriations shown on the lists are decreed at this time. The 79 instream flow appropraitions held in candidate wilderness areas will be senior to any reserved right obtained by the Federal government through reserved rights. Of the 226 appropriations held by the CWCB in existing wilderness areas. it is estimated that approximately 85 of those appropriations would be senior to a federal reservation of water for instream flow purposes. (The actual number of CWCB appropriations senior to a federal reservation could vary between 62 and 105 depending upon the establishment date for the portion of the wilderness in which the CWCB instream flow appropriation is loea ted. ) Lastly, please note that these lists are based upon the interpretations made by Jim McDanold and me. There were a number of "close calls" that might be interpreted differently by other individuals. 1014E