C150163 Feasibility Study - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I check gate to divert ditch flows and an overflow spillway to attenuate surges in the ditch due to storm events. 5. Construct the Jack Wells Pumping Station, a pumping station designed to transfer water from the Sarnesville Equalizer into the North Side Extension, Cornish Plains Reservoir, or Drury Reservoir. 6. Construct a pipeline to carry water from the Jack Wells Pumping Station to the North Side Extension, Cornish Plains Reservoir, or Drury Reservoir. The pipeline would consist of a 36-inch line from Sarnesville to the North Side Extension and Cornish Plains Reservoir and a 24-inch line from Cornish Plains Reservoir to Drury Reservoir. Smith Geotechnical Engineering Consultants has conducted feasibility-level design work for the proposed dams, pumping station, and pipeline and HRS has conducted design work for the augmentation plan and water rights requirements. The site description for the selected alternative including evaluation of engineering issues is summarized in the following section. Site Description The site is located in Sections 4, 5, 8, 9, and 17 of Township 6 North, Range 63 West of the 6th Principle Meridian. Figure 2 shows a site location map. The site slopes generally to the southeast and consists of gently rolling pastureland. Existing landforms on the site are the result of erosion and consist of remnants of alluvial deposits of clay and sand that cover residual sandstone and shale. A site map for the proposed reservoirs is shown in Figure 3. Drury Reservoir Drury Reservoir will be located on the north side of the North Side Extension and will be filled with water pumped from Barnesville Equalizer. Drury Reservoir will require two dams. The main dam along the south side will be approximately 4630 feet long and will have a maximum height of approximately 15 feet and an 18 foot crest width. The east dam will be approximately 2425 feet long and will have a maximum height of approximately seven feet and an 18-foot crest width. A cutoff trench will be necessary beneath the main dam to reduce seepage along the foundation. A toe drain and a blanket drain will be constructed on the downstream side of the main dam to control seepage that comes through the dam. The reservoir will be designed to store up to 600 ac-ft of water. Typical details for Drury Reservoir are shown in Figure 4. Cornish Plains Reservoir Cornish Plains Reservoir will be located on the north side of the North Side Extension and will be filled with water pumped from Sarnesville Equalizer or with water released from Drury Reservoir. The Cornish Plains Reservoir dam will be approximately 3240 feet long and will have a maximum height of approximately New Cache Feasibility Study 6