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• Lake Catamount: <br />• Historically released up to 2,000 ac-ft in October to prevent icing problems at <br />inlet. Slowly refill in the following spring. No longer do this practice. (This <br />was not implemented.) <br />• Sarvis Ditch: <br />• No controlled diversion at top of basin divide. Poor records but are adjusted <br />by water commissioner based on snowpack measurements. <br />• 1,000-2,000 acre-feet/year. Records will overstate diversion. <br />• Walton Creek Ditch irrigates everything from McKinnis Creek to the main <br />stem <br />• Enterprise Ditch acreage does not include golf course (Hwy 131 -Hwy 40) <br />(Golf course acreage not modeled.) <br />• Suttle Ditch irrigates both sides of river. <br />• Fish Creek Municipal Intake serves both the Mt. Werner Water and Sanitation <br />District (WSD) and Steamboat. <br />• Structure ID 1027 -Burgess Creek Pipeline is the old Mt. Werner diversion. <br />• Steamboat Garden Ditch has not been used in over 15 years. No irrigated <br />acreage left. <br />• Kent Holt indicated his opinion that the overall seasonal irrigation efficiency <br />in the Yampa River basin is probably on the order of 15 -20 percent. For <br />irrigation return flows, he estimates that up to 70 percent is surface runoff. <br />• Typical irrigation season in Yampa drainages: <br />• Bear River -Hunt Creek: Begins around May 1 to May 15; ends around end <br />of July. <br />• Yampa River main stem: Begins around June 1; ends around mid-July. <br />• West of Hayden; First cutting of alfalfa around 3rd week of June: Second <br />cutting in early August. Occasionally a third cutting. <br />• There is some late season irrigation after harvest (fall pasture). (not modeled) <br />• Most of the ditches and diversions downstream of Steamboat Springs do not <br />have measuring devices. These structures are occasionally rated by Kent or <br />the commissioners. <br />Interview with Andi Schaffner (Districts 57 & 58) <br />Water District 57 <br />• Oak Creek: <br />• Rich Ditch is a carrier ditch from Trout Creek to Oak Creek. Treat as inflow to <br />Oak Creek. These inflows benefit the Rossi, Oakdale and Alpha ditches. <br />(Modeled as a transbasin diversion to Oak Creek.) <br />• Oak Creek Ditch is No. 1 priority (11 cfs); return flows mostly (80 percent) to <br />Yampa River. <br />• Lyon Ditch No. 1 is senior right but only 1 cfs; Lyon No. 2 typically 3-5 cfs. <br />• To determine physical capacity of ditches, search diversions records for <br />maximums. <br />Yampa River Basin Information 3-15 <br />