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� <br />�J <br />� <br />� <br />� <br />� <br />� <br />� <br />� <br />�J <br />� <br />� <br />� <br />� <br />� <br />L <br />� <br />� <br />V. <br />allowed. The services of a geotechnical engineer will be engaged to monitor <br />all compaction testing. <br />Outlet Works <br />A. Water Level Control Vault: To facilitate more controlled release rates at the <br />reservoirs, in-line water level control vaults will be installed in the <br />embankments at both reservoirs. Each vault will have fiberglass reinforced <br />plastic stoplogs which can be removed to provide the desired water release <br />rates. Each vault has a secured access hatch which will extend 6-inches <br />above the dam crest. The water level control vaults will have staff gages on <br />the inside for visual inspections of the reservoir water levels. <br />B. Outlet Culvert: Each reservoir will have 18-inch HDPE culverts installed to <br />replace the failing CMP culverts. The outlet culverts will have 18-inch <br />perforated riser pipes, with stainless steel wire mesh screens, to function as <br />the new water intakes. Mesh screen openings and perforated HDPE riser <br />pipes will be sized to preclude fish and debris entering the water intake <br />structures. Screens will be placed at the outlets of the culverts to prevent <br />animals from entering the conduits. <br />C. Sand Collar Filter: Sand collar filters will be incorporated into the outlet <br />design. The sand collar will be placed around the outlet conduit at a location <br />beneath the downstream slope of the dam and will be approximately midway <br />between the dam crest and downstream toe. A perforated PVC drain will be <br />placed in the sand collar material and connected to a solid wall PVC pipe <br />outside the sand collar. <br />D. Spillway: New spillways will be constructed to replace the existing <br />deteriorated spillways. The proposed spillways have been designed to pass <br />the 100-year storm event (200 cfs). The trapezoidal spillways will be <br />constructed with riprap placed on an impermeable hypalon liner. The riprap <br />will extend to the toe of the embankment. The dam freeboard, the vertical <br />distance from the bottom of the spillway to the dam crest, will be established <br />at 3-feet. <br />