Laserfiche WebLink
<br />Description of Proposed Improvements: Sheet II <br /> <br />Estimated Cost of Proposed Improvements: <br /> <br />Sheet 11 (Reach B) <br /> <br />An improved open channel is recommended in this reach, with <br /> <br /> <br />grass-lined or gabion-lined slopes as shown. Erosion protection <br /> <br /> <br />would be provided by a concrete low flow channel and drop struc- <br /> <br /> <br />tures. The channel improvements would provide an opportunity <br /> <br /> <br />for development of a greenbelt park area. <br /> <br />Item Description <br /> <br />Quantity unit unit Price Cost <br />120 L.F. $ 320 $ 38,400 <br />30 L.F. 30 900 <br />1 Ea. 5,000 5,000 <br />1 Ea. 7,000 7,000 <br />19,000 C.Y. 3 57,300 <br />335 C.Y. 210 70,350 <br />2,090 C.Y. 22 45,980 <br />520 C.Y. 17 8,840 <br />2,000 L.F. 14 28,000 <br />4 Ea. 5,000 20,000 <br />530 L.F. 20 10,600 <br />3 Ea. 1,000 3,000 <br /> $295,370 <br /> 44,306 <br /> 29,537 <br /> $369,213 <br /> <br />CONSTRUCTION <br /> <br />10' x 5 I Box CUlvert <br /> <br /> <br />Asphalt over Box Culvert <br /> <br /> <br />Inlet Headwall <br /> <br /> <br />Outlet Headwall <br /> <br /> <br />Open Channel Excavation <br /> <br /> <br />Concrete Low Flow Channel <br /> <br /> <br />Slope Protection <br /> <br /> <br />Slope Protection Filter <br /> <br /> <br />Maintenance Roadway <br /> <br /> <br />Drop Structures <br /> <br /> <br />8" Sanitary Sewer Relocation <br /> <br /> <br />Manholes <br /> <br /> <br />Construction Sub-total <br />15% Engineering <br />10% Contingencies <br />Total Construction <br /> <br /> <br />LAND ACQUISITION <br /> <br /> <br />Right-af-way Acquisition <br /> <br /> <br />10% Contingencies <br /> <br /> <br />5% Legal <br /> <br /> <br />Total Land Acquisition <br /> <br /> <br />TOTAL COST <br /> <br />A <br /> <br />25.000 <br /> <br />272,500 <br />27,250 <br />13,625 <br />$313,375 <br /> <br />$682,588 <br /> <br />Between Lamar Street and Station 96+50, relocation of an existing <br /> <br /> <br />sanitary sewer is advised. The sewer presently crosses Dry <br /> <br /> <br />Gulch on a dike over a 48-inch culvert at station 96+25, and is <br /> <br /> <br />subject to wash-out by any flow which would exceed the capacity <br /> <br /> <br />of the 48-inch pipe. Relocation of the sanitary sewer will <br /> <br /> <br />allow removal of the dike and filling of the adjacent land to <br /> <br /> <br />reduce the size of the floodplain. <br /> <br />A new 10'xl5' box culvert is recommended under Lamar Street. <br /> <br /> <br />The conduit would convey the lO-year flood without allowing over- <br /> <br /> <br />topping of the street. The lOO-year flood would inundate Lamar <br /> <br /> <br />Street. Both floods would reach a considerable backwater depth <br /> <br /> <br />at Lamar Street, which would extend upstream approximately 800 <br /> <br /> <br />feet. This ponding, after construction of the proposed improve- <br /> <br /> <br />ments, does not create a flood hazard and appears to be acceptable. <br /> <br />10.9A <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 />