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<br />I <br />I <br />I <br /> <br />I <br /> <br />Reach F-G <br /> <br /> <br />1. Design a 25-year channel between the medical center and the <br /> <br /> <br />Jefferson County High School property west of Pierce Street. <br /> <br /> <br />20 Design the Teller Street crossing for the minimum of either <br /> <br /> <br />a five-year des ign of 18" depth over the road for the 100-year <br /> <br />fI ood 0 <br /> <br /> <br />3. Design a new culvert under Wadsworth which in combination with <br /> <br /> <br />the existing 36" conduit will match the capacity of the existing <br /> <br /> <br />conduit under the medical center. <br /> <br />CONCEPTUAL <br /> <br />I <br />I <br /> <br />Reach F-L <br /> <br /> <br />1. Design a five-year conduit along the thalweg to Vance Street. <br /> <br /> <br />2. Design a IOO-year detention pond between Vance and Wadsworth. <br /> <br /> <br />The pond should have gentle side slopes to provide for passive <br /> <br />recreation. <br /> <br /> <br />3. Design a flow restricter and side channel spillway for the <br /> <br /> <br />Rocky Mountain Ditch. Design a conduit from the spillway <br /> <br /> <br />to the detention pond. The conduit should be sized to keep <br /> <br /> <br />the IOO-year flow within the street right-of-way. <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br /> <br />I <br /> <br />Reach J-K <br /> <br /> <br />1. Design channel and conduit for the five-year flood. Between <br /> <br /> <br />24th and Gray the conduit alignment should be in the street <br /> <br /> <br />right-of-way. Abandon the existing conduit. <br /> <br /> <br />2. Provide positive drainage from low points to the new conduit. <br /> <br />I <br /> <br />I <br /> <br />Reach J-North <br />No improvements are recommended for this reach. <br /> <br />I <br /> <br />I <br /> <br />SUMMARY <br /> <br />The preliminary design of the Sloans Lake basin drainage and flood <br /> <br /> <br />control improvements is based on the recommended combination of <br /> <br /> <br />Basin Alternatives 1, 2, and 3 from the Phase A report with recom- <br /> <br /> <br />mendations and modifications from all jurisdictions. The storm sewers <br /> <br /> <br />recommended in this master plan are all circular reinforced concrete <br /> <br /> <br />pipe and were des i gned to genera 11 y convey the 5-year flood. It is <br /> <br /> <br />recommended that during the final design, all sanitary sewer and major <br /> <br />water and gas lines be field located to determine accurate elevationso <br /> <br /> <br />If conflicts arise, oval pipes or slope adjustments should be consid- <br /> <br />ered to eliminate the need for utility relocations. <br /> <br />I <br /> <br />I <br />I <br />I <br /> <br />RECREATION <br /> <br />MASTER <br /> <br />PLAN <br /> <br />16 <br />