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<br />" <br /> <br />,I <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Young Creek Reservoir Company <br />September 14.15, 2004 <br /> <br />Agenda Item 40 <br /> <br />Alternative 1, No-action alternative - is considered unacceptable since no action will result in <br />storage restrictions by the SEO, thereby impairing YCRC's ability to supply irrigation flows to its <br />shareholders. <br /> <br />Alternative 2, Install 60 mil HDPE liner- involves lining the area of proposed rehabilitation with a <br />High Density Polyethylene (HOPE) liner. The area along the left abutment of the reservoir between <br />elevations 84 ft. and 102 ft. extending from the dam face into the reservoir basin is the area of <br />treatment. The liner would cover an area about 200 feet long by 140 feet wide, a total of 31 00 sq. <br />yards. The liner would be anchored along the limits of the rehabilitation area, and a rip rap bedding <br />material installed (12" deep) and rip rap (24" deep) installed over the bedding material. If necessary <br />in the future, the liner can be extended. <br /> <br />Alternative 3, Install geosynthetic clay liner (GCL) - This is similar to the treatment above, but <br />the liner would be GCl material, a sandwiched composite of bentonite clay between two geotextile <br />fabric layers. <br /> <br />Alternative 4, Install compacted clay liner (CCL) - This is also similar to the treatment above, but <br />the liner would be CCl material. Clay material, excavated in the stripping preparation process, <br />would be stockpiled for reuse in the liner system. A compacted 12" layer of filter material would be <br />placed against the exposed slide rock and covered by an 18" layer of CCl material. A rip rap <br />bedding would be placed over the liner material (12" deep) and rip rap (24" deep) installed over the <br />bedding. <br /> <br />The selected alternative. Alternative 2 - Based on reliability, ease of placement, level of <br />effective treatment and cost, Alternative 2 (HDPD liner) has been selected as the preferred <br />, alternative. The construction time will be less than the other alternatives. <br /> <br />The total Project cost is estirnated to be: <br /> <br />1. <br />1. <br />2. <br /> <br />Preliminary Evaluation/Investigation Costs <br />Construction & Contingency <br />Engineering Design & Inspection <br />TOTAL <br /> <br />$ 42,650' <br />144,490 <br />29,985 <br />$217,125 <br /> <br />'Funds expended to date for geotechnical study, piezometer installation, etc. <br /> <br />The final design has been completed. Construction is scheduled to begin in late September 2004 <br />and be completed by October 2004. No permit issues are anticipated as reservoir and borrow <br />material work will occur within the existing footprint. <br /> <br />Financial Analvsis <br /> <br />The total estimated cost of the project is $217,125 and YCRC water ownership is all agricultural. <br />Staff is recommending a maximum loan amount of $195,400 (approximately 90% of the estimated <br />project cost) for 30 years at an interest rate of 2.50%. The remaining $21,725 will be covered by <br />increases in assessments to shareholders and an additional loan from the Surface Creek Bank. <br />YCRC will cover any costs that exceed the estimated project cost. <br /> <br />Table 1 is a summary of the financial aspects of the project. A CWCB loan of $195,400 would <br />have an annual payment of $10,270 (including the 10% reserve requirement) at the loan terms of <br />2.50% for 30 years. The annual loan cost for the project will be $13.13 per acre-foot, based on the <br />Reservoir #1-2 storage volume of 782 acre feet. <br /> <br />Page 3 of 5 <br />