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Last modified
9/26/2011 8:37:05 AM
Creation date
7/9/2008 10:08:36 AM
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Decision Support Systems
Title
SPDSS Task 5 - Key Structure, Bob Creek Ditch
Description
The Bob Creek Ditch 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
7/15/2005
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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In a conversation with Randy Gustafson with City of Greeley, it was learned that 2003 <br />was the first year the complete Ditch was utilized since being re-opened in 1998. The <br />annual diversions for Bob Creek Ditch in 2003 was approximately 293 acre-feet. <br />Inclusion of the 2003 annual diversions would result in a higher average annual diversion <br />for Bob Creek Ditch. Monthly diversions for Bob Creek Ditch are presented in Table 2. <br />WATER RIGHTS <br />Bob Creek Ditch has a decreed direct flow water right for a total of 60.0 cfs absolute from Bob <br />Creek, a tributary to the Laramie River. There is no associated storage in the Laramie River <br />basin. Table 1 presents the details of the associated direct flow rights. <br />Table 1 <br />Direct Flow Water Rights <br />Structure Appropriation Adjudication Administration Decreed <br /> <br />Name Source <br />Date <br />Date <br />No. <br />Rate Use <br />Bob Creek Bob 9/24/1897 9/11/1944 24066.17434 60.00 cfs Irrigation <br />Ditch Creek <br />Colorado Water Rights Tabularion. <br />Compact and Other Legal Considerations: Bob Creek Ditch is one of five transmountain <br />diversion structures included in the Laramie River Compact between Colorado and <br />Wyoming. The 1957 Substitute Decree in Wyoming v. Colorado [353 U.S. 953 (1957)], <br />known as the Laramie River Decree or Laramie River Compact, permits Colorado to <br />divert 49,375 acre-feet per year from the Laramie River basin as follows: <br />1. 19,875 acre-feet per year maybe diverted by Colorado for transmountain users. <br />Transmountain users include Water Supply and Storage Company (Laramie <br />Poudre Tunnel Diversion and Skyline Ditch), The Tunnel Water Company <br />(Laramie Poudre Tunnel Diversion and Skyline Ditch), The Divide Canal and <br />Reservoir Company (Deadman Ditch), and the City of Greeley (Bob Creek Ditch <br />and Columbine Ditch). Each of these diversions exports water from the Laramie <br />River basin into Water District 3. <br />2. 29,500 acre-feet per year maybe diverted by Colorado irrigators (called the <br />"meadow users") for use within the basin (Water District 48), of which not more <br />than 1,800 acre-feet can be diverted after July 31st of each year. <br />3. Any portion of the 19,875 acre-feet per year not diverted by Colorado for use <br />outside the basin can be added to the 29,500 acre-feet per year permitted for use <br />within the basin. <br />4. All waters diverted by Colorado for use within the basin are restricted to irrigation <br />use on the 4,845 acres designated by the court at the time of the decree. <br />OPERATIONAL INFORMATION <br />Use of Bob Creek Ditch as a transbasin diversion structure has been sporadic since its inception. <br />In 1957, Bob Creek Ditch was shut down by court order in Wyoming vs. Colorado, 289, U.S. <br />BobCreekDitch.doc 6 of 9 <br />
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