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The Mariano exchange (Lon Hagler Reservoir and Mariano Reservoir) typically operates <br />starting in mid-July. Releases are made to the river for out-of-priority diversions through <br />the Home Supply Ditch headgate. <br />Deliveries of C-BT water owned by the individual irrigators is typically made at the end <br />of the season (during September) to supplement the share yields from the Company's <br />water right holdings. <br />Johnstown takes its direct water rights from the Home Supply Ditch through Lone Tree <br />Reservoir. Winter municipal supplies for Johnstown are provided by the Company's <br />storage rights. Johnstown has a small amount of terminal storage that is used to provide <br />the town with additional flexibility in its delivery system. <br />The Home Supply Ditch conveys both direct flow and storage diversions on behalf of the <br />shareholders. There are 2,001 shares and approximately 1501ateral headgates in the service area, <br />each with its own measuring flume. Historic yields have average about 10 ac-ft/share with adry- <br />year yield of about 7 ac-ft/share. The dry-year yield comes predominantly from storage. <br />Where to find more information <br />^ The Water District 4 Meeting Notes prepared for SPDSS Task 3 -Identify Key Diversion <br />Structures contains additional information on ditch and reservoir operations within the <br />Water District. <br />^ The SPDSS Task 5 Memorandum -Northern Colorado Water Conservancy District and the <br />Colorado-Big Thompson Project contains additional information on NCWCD and C-BT <br />operations within the Water District. <br />^ The Irrigated Acreage Assessment GIS Coverage prepared for SPDSS in Water District 4 <br />has preliminary irrigated area for the Consolidated Home Supply Ditch and Reservoir <br />REFERENCES <br />1) Fred Renner, Water Commissioner Division 1, District 4. Phone: 303.857.2987 <br />2) Delbert Helzer interview, October 26, 2004. Phone 970.667.5567. <br />3) Consolidated Home Supply Ditch and Reservoir Company Emergency Loan Request from <br />Colorado Water Conservation Board Construction Fund to Rehabilitate Mariano Reservoir <br />Dam, September 11, 2001. <br />4) Watercolorado.com <br />5) State of Colorado, Division of Water Resources, Hydrobase database. <br />Home Supply Ditch Operating Memorandum.doc 15 of 15 February 16, 2005 <br />