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Program/Proiect Management <br /> The Rio Grande Cooperative Project involves the coordination and management of many <br /> different project components. Some of key project management issues that need to be addressed <br /> prior to the SLVID proceeding forward with construction, are 1) successful negotiation, <br /> feasibility analysis and exchange of land between the Forest Service and the SLVID,2) storage <br /> accounts and operation modeling, 3)execution of storage agreements, and 4)overall stakeholder <br /> coordination and program management. The successful management of these key issues is vital <br /> to the overall success of the Project. This work is currently being conducted by SLVID under <br /> Contract C154219 at a cost of$239,360, under its sub-consultant—DiNatale Water <br /> Consultants. <br /> Primary Construction Components <br /> Phase I -Upstream Clay Slope Liner, Clay Blanket, and Grout Curtain - In order to reduce <br /> seepage through the rock slide formation at the left dam abutment, a clay blanket slope liner will <br /> be installed on the upstream side of the dam at the left abutment. The clay blanket will be a <br /> zoned fill placed over the rock slide and extending across the west abutment of the dam <br /> approximately 100 feet. The zones include a filter layer, low permeability clay core, and cover <br /> zone. Additionally, a grout curtain will be constructed along the right abutment into bedrock. <br /> These improvements are expected to substantially reduce seepage and allow full storage <br /> capability of the reservoir to be achieved. Clay liner materials will be obtained by borrowing <br /> and processing approximately 20,000 cubic yards of soil and rock material from reservoir <br /> property. Processing shall consist of screening various gradations from the existing landslide <br /> deposit. The clay liner material for the construction component described above was <br /> conducted under Contract C154213, under its sub-consultant—Brad Moore, at a final cost of <br /> $274,787.50. <br /> Phase II - Low Level Outlet- The existing low level outlet will be replaced with a hollow jet <br /> valve discharge structure at the downstream side of the dam. The existing low level outlet tunnel <br /> will continue to be used to provide conveyance between the upstream and downstream portals. <br /> The existing sluice gate control structure will either be demolished or abandoned in-place with a <br /> bypass tunnel providing conveyance around the structure; this is shown on Figure 1. Schedule <br /> constraints for the work and the uncertainty of the demolition costs (for removal of existing <br /> sluice gate control structure) suggest that the construction bidding process may be the best way <br /> to determine the most economic solution. To that end,we recommend preparing the bidding <br /> documents with two options: Option 1 —Demolish Existing Sluice Gate Structure and Option 2— <br /> Construct Bypass Tunnel and Abandon Sluice Gate Structure. The District can then select which <br /> option is most economic based on the results of the bidding. Another important element of the <br /> low level outlet works is the provision for the future addition of hydropower. To allow <br /> hydropower to be added in the future with minimal disturbance to the primary function of the <br /> project, a tap will be provided at the low level outlet(downstream of the tunnel portal)which can <br /> be used to route flows to future turbine generator units. <br />