Laserfiche WebLink
<br />. Project Description and Alternatives <br /> <br />The purpose of this project is to provide a means for the WDC to continue providing irrigation <br />water to shareholders while minimizing the occurrence of future failures of their ditch. Four <br />alternatives were considered: <br /> <br />1, The no-action alternative. <br />2. Reconstruct the ditch out of earth. <br />3. Reconstruct the ditch in a pipeline. <br />4. Reconstruct the ditch in a pipeline tied to bedrock. <br /> <br />Alternative No. 1 was considered unacceptable since it means the WDC could not deliver <br />water to its shareholders, <br /> <br />Alternative NO.2 was ruled out because this alternative has not been successful in the past. <br /> <br />Alternative No.3 was ruled out because any further rnovement of the slide mass would deflect <br />and rupture the new line. <br /> <br />. <br /> <br />Alternative No.4 was selected, since it is considered to be the least costly reliable approach, <br /> <br />The selected alternative, Alternative No.4, involves construction of 400 feet of 36" diarneter <br />heavy wall steel pipe anchored with :y." wire rope into bedrock. Excavation of approximately <br />8000 cubic yards, with blasting into bedrock, will be necessary for pipe placernent. The project <br />also includes installation of interceptor drains, followed by back-fill with compacted soil to <br />restore the approximate slope grade. <br /> <br />The Routt County Office of the Natural Resources Conservation Service (NRCS) has prepared <br />engineering designs and a cost estirnate. The plans are attached in the back pocket of this <br />study and the cost estimate is included in Appendix D. The estirnated cost of the completed <br />project is $162,750 as summarized in Table 2, <br /> <br />Table 2. Woodchuck Ditch Company - Diversion Structure Project - Cost Estimate <br /> <br />. <br /> <br />Item Quantity Unit Unit Price $ Amount $ <br />Mobilization 1 Job 6,700 $6,700 <br />Rock Excavation 250 C.y, 70 17,500 <br />Earth Excavation 8600 C.y. 2.50 21,500 <br />lined Steel Pipe 400 Ft. 51.50 20,600 <br />Cable assemblies 48 EA 200 9,600 <br />Pipe Placement 400 Ft. 20 8,000 <br />Pipe Joint Welding 35 EA 310 10,850 <br />Earth Backfill 8600 C.Y. 4 34,400 <br />Misc. 1 Job 10,850 <br />Contingency 1 Job 10,000 10,000 <br />Subtotal $150,000 <br />Engineering Design/Supervision @ 8.5% 1 Job 12,750 12,750 <br /> <br />Woodchuck Ditch Company <br />Feasibility Study <br />March 2000 <br /> <br />Page 9 of 13 <br />