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Last modified
3/26/2010 3:55:22 PM
Creation date
9/30/2006 10:17:18 PM
Metadata
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Template:
Publications
Year
1994
Title
Fort Lyon Canal Company Water Transfer Alternatives Study - Final Report
CWCB Section
Finance
Author
Gronning Engineering
Description
Analysis of the alternative approaches to, and the results of the transfer of agricultural water supplies from the Ft. Lyon Canal Company to alternative uses
Publications - Doc Type
Brochure
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<br />A. Ft. Lyon Canal Company issues: relevant to farmers and ranchers served by the ditch <br /> <br />company; <br /> <br />1. Water supply and the individual farm business <br />2. Fl. Lyon Canal Company operations and finances <br />3. Environmental; and ecosystems <br /> <br />B. Regional issues: relevant to citizens of the larger study area, including water users not <br />directly associated with the company; <br /> <br />1. Water supply; quality, quantity and distribution <br />2. Economic, financial and social; commerce, opportunity and quality of life <br />3. Environmental; riparian wetlands and plains ecosystems <br /> <br />C. Statewide issues: of concern to all Coloradans, the State government, and the <br />Colorado General Assembly. <br /> <br />A. Fl. Lvon Canal Companv Issues <br /> <br />Issues evoked by water transfers which are internal to the Fl. Lyon system revolve around two <br />themes. These are 1) individual losses and gains of farmers related to irrigation water supply <br />and personal finances, and 2) the ability of the ditch company to provide continuing service to <br />shareholders. Internal issues are therefore presented from the perspective of the shareholders <br />remaining in the system, when adjacent farms are retired from full-time irrigation. The concerns. <br />are primarily of three types - continued historic water supply, adverse changes in ditch and lateral <br />operations, and financial impacts on farming costs and property values. <br /> <br />1. Water Supply and the individual farm business <br /> <br />Historically, water transfers have required a change in the point of diversion. Flow to the ditch is <br />reduced. This affects the flow characteristics of the canal in several ways. The water surface is <br />lowered and the hydraulic head required to make deliveries is not maintained. Additionally, there <br />is an increase in seepage loss as a percentage of total flow. <br /> <br />The changes in flow regime within the ditch have traditionally been addressed by construction of <br />checks or mechanisms to elevate the water surface and by requiring the sellers to leave a portion of <br />their water in the canal to offset evaporation and seepage loss. A benefit from a transfer occurs for <br />canals which historically have been limited in hydraulic capacity to make deliveries. The excess <br />capacity accrues to the remaining shareholders. An alternative approach to the allowance for <br />seepage losses is to line portions of the channel. However, lining could reduce historic return flows <br />on which other surface water users rely, and interfere with water supplies to existing alluvial wells <br />below the canal. Changes may also impact well usage. Incremental increases in reservoir <br />evaporation also may occur. <br /> <br />2-6 <br />
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