SPDSS_Task5_KeyStructure_GrandRiverDitch

• Title: SPDSS Task 5 - Key Structure, Grand River Ditch
• Description: The Grand River 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: 4/6/2004
• 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

Diversions through Grand River Ditch may be turned off completely if there is excessive rain or
water in the basin and the act of importing addi tional water could increase the possibility of flood
conditions.
Where to find more information
Specifics relating to the data collection and f illing processes used in the determination of
the best source of data are presented in the SPDSS Task 4 Memorandum – Identify and
Fill/Resolve Conflicting R ecords for Key Transmountain Diversion Structures.
Additional information on ditch and reservoi r operations within Water District 3 is
presented in the Water District 3 Meeting Notes prepared for SPDSS Task 3 – Identify
Key Diversion Structures.
Additional information regarding the operating practices for the Water Supply and
Storage Company is presente d in the Water Supply and Storage Company Memorandum
prepared for the SPDSS Task 5 – Key Structures.
COMMENTS AND CONCERNS
None.
REFERENCES
1. Colorado Water Resources & Powe r Development Authority. 1987. Cache la Poudre Basin
Study .
2. Department of Civil Engineering Colorado Stat e University Fort Collins, Colorado. 1996.
Input-Output Modeling of the Cache la Poudre Water System .
3. George Varra. Water Commissioner Divi sion 1, District 3. Phone: [phone]
4. Rocky Mountain Consultants, Inc. 1990. Engineering Documentation for Change of Use of
the City of Thornton’s Shares in the Wate r Supply & Storage Company and Jackson Ditch
Company 87CW332 .
5. Water Right Data. Divisi on of Water Resources. http://water.state.co.us/
6. Water Supply and Storage Company. Telephone conversation with Fred Walker, president.
7. Winchester, John N. 2001. A Historical View: Transmount ain Diversion Development in
Colorado. Technical paper presented at: Trans Basi n Water Transfers, Proceedings of the
2001 Water Management Conference, US Committ ee on Irrigation and Drainage. June 27 –
30, 2001.
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