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<br />Cost <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Description of Proposed Improvements: Sheet l6 <br /> <br />Estimated Cost of Proposed Improvements: Sheet 16 (Reach H) <br /> <br />A continuation of the storm sewer system, predominantly 78-inch <br /> <br /> <br />in diameter, is proposed, except between Vance Street and Wads- <br /> <br /> <br />worth Blvd. This is one of the few places in which the North <br /> <br /> <br />Dry Gulch channel still exists in an open and natural condition. <br /> <br /> <br />An open channel with grass lined slopes, erosion control struc- <br /> <br /> <br />tures, and a maintenance roadway are proposed. The greenbelt <br /> <br /> <br />appearance of this channel could be incorporated into a park, if <br /> <br /> <br />additional land were acquired. Conversely, a closed pipe system <br /> <br /> <br />could be substituted for the open channel if open space in the <br /> <br /> <br />area is not considered economically feasible. <br /> <br />Item Description <br /> <br /> <br />CONSTRUCTION <br /> <br />7211 Storm Sewer <br /> <br /> <br />78" Storm Sewer <br /> <br /> <br />Asphalt over 72" Pipe <br /> <br /> <br />Asphalt over 78" Pipe <br /> <br /> <br />Manholes <br /> <br /> <br />Inlets <br /> <br /> <br />Special Inlet at 869 + 40 <br /> <br /> <br />Inlet Pipe <br /> <br /> <br />Asphalt for Inlet Pipe <br /> <br /> <br />Open Channel Excavation <br /> <br />Low Flow Channel <br /> <br /> <br />Concrete Apron <br /> <br /> <br />Construction Sub-total <br />15% Engineering <br />10% Contingencies <br />Tbtal Construction <br /> <br />The proposed storm sewer system would convey the ten-year flood <br /> <br /> <br />but would leave surface flow in a lOO-year event. Very little <br /> <br /> <br />surface flow could be allowed to cross Wadsworth Blvd., since it <br /> <br /> <br />must remain capable of carrying emergency traffic in a lOO-year <br /> <br /> <br />flood. It is recommended that the entire 100-year flood be <br /> <br /> <br />carried under the street, and that a large inlet structure be <br /> <br /> <br />constructed to collect the approximately 260 cfs reaching Wads- <br /> <br /> <br />worth on the land surface. <br /> <br />LAND ACQUISITION <br />Right-of-way Acquisition <br />Easements along Pipe Lines <br /> <br />Land Acquisition Sub-total <br />10% Contingencies <br />5% Legal <br />Total Land Acquisition <br /> <br />TOTAL COST <br /> <br />70 L.F. $ 160 $ 11,200 <br />2,050 L.F. 200 410,000 <br />70 L.F. 24 1,680 <br />1,510 L.F. 25 37,750 <br />4 Ea. 1,000 4,000 <br />28 Ea. 1,000 28,000 <br />1 Ea. 16,500 16,500 <br />840 L.F. 30 25,200 <br />840 L.F. 18 15,120 <br />1,000 C.Y. 3 3,000 <br />84 C.Y. 210 17,640 <br />15 C.Y. 210 3,150 <br /> $573,240 <br /> 85,986 <br /> 57,324 <br /> $716,550 <br /> <br />Quantity <br /> <br />2.3 <br />1,250 <br /> <br />Unit <br /> <br />A <br />L.F. <br /> <br />Unit Price <br /> <br />45,000 <br />15 <br /> <br />$103,500 <br />18,750 <br /> <br />$122,250 <br />12,225 <br />6,113 <br />$140,588 <br /> <br />$857,138 <br />