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Last modified
9/26/2011 8:52:20 AM
Creation date
7/10/2008 9:22:14 AM
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Decision Support Systems
Title
SPDSS Task 5 - Key Structure, Water Supply and Storage Company
Description
The Water Supply and Storage Company has been identified as a key structure for the South Platte Decision Support System (SPDSS) consumptive use and surface water modeling efforts. The purpose of this Task 5 memorandum is to document physical, legal, and operational aspects of those key structures identified.
Decision Support - Doc Type
Task Memorandum
Date
3/5/2005
DSS Category
Surface Water
DSS
South Platte
Basin
South Platte
Contract/PO #
C153954
Grant Type
Non-Reimbursable
Bill Number
SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
Prepared By
Leonard Rice Engineering
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2) WSSC Plains System <br />The WSSC plains system is located between lands irrigated under the North Poudre Irrigation <br />Company (NPIC) to the north and the Larimer and Weld Irrigation Company (Larimer and Weld <br />Company) to the south. Key structures identified in the WSSC Plains System include the <br />Larimer County Canal and the system of nine reservoirs that make up the WSSC Plains <br />Reservoir System. <br />Larimer County Canal (Structure ID 0300911) <br />When Larimer County Ditch Company began construction of the Larimer County Canal in 1881 <br />it was the region's largest irrigation ditch enterprise. In August 1892, WSSC assumed all <br />obligations of the Larimer County Ditch Company including Larimer County Canal. <br />Larimer County Canal is the primary canal for WSSC. The headgate of the Larimer County <br />Canal is located on the north side of the Cache la Poudre River, approximately two miles <br />downstream of the mouth of the Poudre Canyon, 50 river miles downstream of the Laramie- <br />Poudre Tunnel, 55 river miles downstream of Chambers Lake, and 63 river miles downstream of <br />Long Draw Reservoir. The Larimer County Canal and its laterals convey water from the Cache <br />la Poudre River approximately one mile south of Ted's Place to U.S. Highway 85 as far down as <br />between Pierce and Ault in Weld County. Two major laterals extend from the Larimer County <br />Canal: Pierce Lateral and Collins Lateral. Pierce Lateral extends east from Black Hollow <br />Reservoir and Collins Lateral extends from the eastern extent of Larimer County Canal east of <br />Highway 85. The two laterals extending from the canal are carrier ditches not owned by WSSC. <br />The locations of the Larimer County Canal and associated laterals are shown of Figure 2. <br />. <br />~f <br />l <br />-. ~. <br />? .~ ~ . <br />~ <br />~. ~ <br />4 t1 ~ <br />1 .. <br />~ <br />p' <br />~ y . <br /> <br />^ ,. <br />~_ <br /> <br /> <br />__ <br /> ~~ <br />°v~ <br />v ~ .-.~ <br />.w6L. <br />y~ <br />3 ~tl~4 <br />nv ':., <br />~v4 .: ...: Tw. ~ <br />~r <br />y <br />_ ., ~- <br /> ~-- <br />Water carried in the Larimer <br />County Canal includes direct flow <br />water, transmountain diversions, <br />releases from WSSC mountain <br />reservoirs, exchanged water, and <br />C-BT water. The canal has <br />historically been used to carry <br />irrigation water to irrigators along <br />the canal or extending laterals. <br />The canal travels in a general <br />eastward direction, meandering <br />north and south as it makes its <br />way to its terminus in Water <br />Bridge on County Road 56 over the Larimer County Canal Dlstrlct 1. As the Canal travels to <br />the east, it intercepts Dry Creek, <br />Boxelder Creek, Coalbank Creek, Spring Creek, and Lone Tree Creek. Town Lateral and Mead <br />Lateral are piped underneath the Larimer County Canal. The eastern extent of lands irrigated <br />under the WSSC System is Owl Creek. <br />Water is delivered from the main canal to the farm laterals through manually operated lateral <br />headgates equipped with Parshall flumes. <br />WaterSupply&Storage Memo.doc <br />10 of 21 <br />
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