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<br />7., B - PRELIMINARY COST ESTIMATE OF ALTERNATIVE IIA:
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<br />Construct a single permanent diversion near Mt. Harris to serve the Marshall Roberts, Williams,
<br />Walker and Shelton Ditches. This alternative includes constructing new earthen canal, new
<br />concrete lined canal, enlargement of existing ditches, and other components as described below.
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<br />omponent: st. ost
<br />A Diversion. A new permanent adjustable height diversion at Mt. Harris $1,041,000
<br /> site serving the Marshall-Roberts and Williams Ditches.
<br />C Combined Ditches Marshall-Roberts 20 cfs
<br /> Williams 20 cfs
<br /> Walker 44 cfs
<br /> Shelton 54 cfs (138 cfs total)
<br />Cl Construct about 400 ft of new earthen ditch from the new diversion $1,000
<br /> site to the existing Marshall-Roberts Ditch
<br />C2 Enlarge about 5,500 feet of the Marshall Roberts Ditch to carry all $1,093,000
<br /> four shares. This includes about 1,000 feet of concrete lined ditch and
<br /> 4,500 ft of earth lined ditch from Highway 40 to the Williams Ditch
<br /> takeout, a Grassy Creek wasteway, Sage Creek wasteway, measuring
<br /> structure, one highway crossing, railroad crossing, farm road crossing,
<br /> Hayden Power Plant waterline crossing, two telephone line crossings,
<br /> a fiber optic cable crossing, and a natural gas line crossing.
<br />C3 Construct 1,000 feet of new earthen ditch to carry the Williams Ditch $78,000
<br /> water (20 cfs) from the Marshall-Roberts Ditch to the Williams Ditch.
<br /> This includes two railroad crossings, an inlet structure, a measuring
<br /> structure, a telephone line crossing, a fiber optic cable crossing, and a
<br /> farm road crossing.
<br />C4 Enlarge 10,000 ft. of the Williams Ditch to carry Williams, Walker $159,000
<br /> and Shelton shares (118 cfs) from the Williams takeout to the Walker
<br /> and Shelton takeouts. This includes two farm crossings, two phone
<br /> line crossings, a turnout structure, and a measuring structure.
<br />C5 Construct 1,000 feet of new earthen ditch to carry the Walker and
<br /> Shelton Ditch water (98 cfs) from the Williams to the Walker Ditch.
<br /> This includes an inlet structure, two drop structures and a railroad
<br /> crossing.
<br />C6 Enlarge 7,300 feet of the Walker Ditch to carry Walker and Shelton $121,000
<br /> water, including two farm road crossings, two phone line crossings, a
<br /> fiber optic crossing and a turn out structure.
<br />C7 Construct 1,700 ft. of new ditch from the Walker to the Shelton (54 $16,000
<br /> cfs) including an inlet structure and two-drop structure.
<br /> Total estimated cost: $2,562,000
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