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Irrigated Acreage and Crop Types: <br />There are approximately 2,861 irrigated acres of <br />predominantly grass pasture and alfalfa under th e Farmers’ High Line that is outside of <br />municipal boundaries, based on the SPDSS i rrigated acreage assessment. Irrigated <br />acreage identified unde r the Farmers’ High Line was at a maximum of 15,235 acres in the <br />assessment of 1956 aerial photography. This acreage does not include some municipal <br />parks, open space, and other areas that may be supplied by the Farmers’ High Line since <br />the SPDSS irrigated acreage assessment focuse d on agricultural irriga tion and analyzed <br />only irrigated areas outs ide of municipal boundaries in the SPDSS study area. <br />Ground Water Use: <br /> There is no significant ground water use under the Farmers’ High Line <br />Canal. <br />Return Flow Locations: <br />Return flows from irrigation of lands along Farmers’ High Line Canal <br />en route to Standley Lake and seepage losse s from operation of the canal accrue to Clear <br />Creek and to Van Bibber, Ralston, and Leyden Cr eeks, all of which ar e tributary to Clear <br />Creek. Canal seepage losses and return flow s from irrigation of lands below Standley <br />Lake accrue to Big Dry Creek, tribut ary to the South Platte River. <br />Measurement Device: <br />Farmers’ High Line Canal headgate diversions from Clear Creek are <br />measured with a 15-foot Parshall Flume equi pped with a clock recorder. Diversions from <br />Farmers’ High Line Canal into Standley Lake are measured with an 8-foot Parshall <br />flume. <br />HydroBase Data: <br />Daily data for Farmers’ High Line Ca nal are available in HydroBase, as <br />Figure 3 <br />summarized on a monthly basis in . Average annual total diversions through the <br />Farmers’ High Line Canal were approxima tely 35,000 ac-ft over the 1950 to present <br />period. Records of various dive rsion and release classes are available in HydroBase for <br />portions of the 1950 to present period. <br />Diversions have reduced through the Farmers’ High Line Canal over the last 20 or so <br />years due to numerous changes of Farmers’ High Line Canal shares, which typically <br />allow the Standley Lake Cities to divert th eir Farmers’ High Line Canal water and other <br />Clear Creek supplies through various locations, including Croke Canal that delivers water <br />to Standley Lake. <br />7 of 24 <br />