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<br />e <br /> <br />e <br /> <br />e <br /> <br />$6 per cubic yard Used at sites with difficult <br />construction such as restricted access in US Forest <br />Service land, borrow areas not obvious, access over poor <br />roads, or in high cost areas (e.g. Aspen). <br /> <br />Rip rap was assumed to be $20 per cubic yard because most sites are <br />in areas with rock in the immediate vicinity. <br /> <br />The outlet pipe cost is the price of the particular size pipe <br />doubled. The control gates are not a significant cost and are <br />estimated to the nearest $5000. <br /> <br />The cost per cubic yard to excavate the spillway, if needed, is <br />assumed to be half the cost of material placement. Concrete in the <br />cutoff wall is $300 per cubic yard. <br /> <br />A toe drain is included at nearly every site, which will consist of <br />a 5 foot deep, 2 foot wide trench (0.27 cubic yards per linear <br />foot) filled with ASTM C-33 sand. A drain pipe with 1/16th inch <br />slotted is placed in the sand to convey water from the trench to a <br />surface channel. The sand is estimated at $30 per cubic yard <br />delivered, the pipe is $1.50 per foot, and the placement cost is <br />estimated to be $20 per cubic yard. The composite total of the <br />costs is $20 per linear foot of toe drain. <br /> <br />The above items are totaled to determine the estimated construction <br />cost for each dam site. <br /> <br />Financinq <br />The total construction cost for each dam site is evaluated using <br />several different financing options. The standard CWCB financing <br />terms (as of December, 1993) of either 4% for 30 years or 3.5% for <br />20 years were evaluated for each site. It is understood that the <br />rates change according to the financial markets which was not <br />incorporated herein. <br /> <br />If an irrigation entity could not repay under those terms, the <br />financing terms were improved until they could. In order to be <br />affordable, irrigation water was assumed to be less than $30 per <br />acre-foot for year. Municipal water was assumed to be repayable at <br />the standard CWCB rates, even though there are some small towns <br />which might have justification for slightly better terms. <br /> <br />A "Financing Option" table is included for each dam site which <br />shows the annual amortized construction cost and the cost per acre- <br />foot based on the annual yield. The values in the table for each <br />dam site was a major factor in evaluating the feasibility of each <br />site and the recommendations described in Chapter V. <br /> <br />Small Dam Site Recon. Study <br /> <br />12 <br />