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PROJ00550
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Last modified
11/19/2009 11:17:47 AM
Creation date
10/6/2006 12:01:19 AM
Metadata
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Template:
Loan Projects
Contract/PO #
C153747
Contractor Name
Consolidated Extension Canal Company
Contract Type
Loan
Water District
67
County
Bent
Bill Number
EIA
Loan Projects - Doc Type
Feasibility Study
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<br />~ <br /> <br />Alternatives Evaluated <br /> <br />A range of alternatives were considered including 1) Replace the <br />entire siphon along with the inlet and outlet structures 2) <br />Patch the breach in the siphon 3) Line the existing siphon with <br />smaller diameter pipe products 4) Don't repair or replace, <br />continue to attempt to deliver water through siphon 5) Abandon <br />siphon 6) Replace the oldest 600 feet of the siphon along with <br />the outlet works, possibly replace additional 400 feet and inlet <br />works, depending on onsite investigation of condition after <br />construction begins. 7) Replace the entire siphon along with <br />inlet and outlet structures with an overhead pipe and support <br />structure. <br /> <br />A subjective evaluation of the alternatives follows: <br /> <br />1. Replace the entire siphon along with the inlet and outlet <br />structures: <br /> <br />This will allow full water deliveries to shareholders <br />and the continuation of 2600 acres in irrigated <br />agriculture. Although the cost estimate is based on <br />this alternative, replacement of the entire siphon <br />structure may not be required as is discussed in the <br />preferred alternative, number 6. <br /> <br />2. Patch the breach in the siphon: <br /> <br />i <br /> <br />The downstream 600 feet of the siphon all dates back to <br />1941 or earlier and is generally believed to be in poor <br />condition. In addition to the existing large failure, <br />an additional failure occurred approximately 80 yards <br />downstream of the current failure. Patching the breach <br />would require significant costs due to the extensive <br />dewatering program required (which will be required of <br />the preferred alternative as well). Significant costs <br />would be incurred with a high likelihood of additional <br />failures in future years, <br /> <br />5 <br />
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