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<br />Description of Proposed Improvements: <br /> <br />Sheet 10 <br /> <br />Estimated Cost of Proposed Improvements: Sheet 10 (Reach B) <br /> <br />A combination of new culverts and improved open channels is <br /> <br />Item Description Quantity Unit Unit Price Cost <br />CONSTRUCTION <br />6' x 10' Box Culvert 470 L.F. $ 380 $178,600 <br />Triple 5' x 10' Box Culverts 70 L.F. 900 63,000 <br />Four - 4' x 6' Box Culverts 90 L.F. 600 54,000 <br />Inlet Headwalls 2 Ea. 15,000 30,000 <br />Outlet Headwalls 3 Ea. 10,000 30,000 <br />Asphalt over 6' x 10' Box 80 L.F. 30 2,400 <br />Asphalt over Triple 5' x 10' Boxes 20 L.F. 64 1,280 <br />Asphalt over Four - 4' x 6' Boxes 40 L.F. 42 1,680 <br />Open Channel Excavation 5,100 C.Y. 3 15,300 <br />Concrete Low Flow Channel 160 C.Y. 210 33,600 <br />Slope Protection 1,050 C.Y. 22 23,100 <br />Slope Protection Fil ter 250 C.Y. 17 4,250 <br />Maintenance Roadway 740 L.F. 14 10,360 <br />Drop Structures 1 Ea. 5,000 5,000 <br />Construction Sub-total $452,570 <br /> 15% Engineering 67,886 <br /> 10% Contingencies 45,257 <br />Total Construction $565,713 <br />LAND ACQUISITION <br />Right-of-way Acquisition 3 A 35,000 105,000 <br /> 10% Contingencies 10,500 <br /> 5% Legal 5,250 <br />Total Land Acquisition $120,750 <br />'lOTAL COST $686,463 <br /> <br />recommended along Dry Gulch. <br /> <br />The proposed 6'xlO' box culvert <br /> <br />between Upham and Teller Street would carry the lO-year flow; <br /> <br /> <br />larger flows would pass overland through the parking lot with- <br /> <br /> <br />out damage. Between Saulsbury and Teller Streets, the existing <br /> <br /> <br />open channel must be lowered to meet the previously described <br /> <br />box and to reduce velocities. <br /> <br />Gabion or concre~e-lined channel <br /> <br />sideslopes are recommended on a 2:l slope. <br /> <br />Triple 5'xlO' box <br /> <br />culverts under Saulsbury Street are required to meet the grade <br /> <br /> <br />of the existing concrete lined channel between Pierce and Sauls- <br /> <br />bury Streets. <br /> <br />The boxes would convey the lO-year flood without <br /> <br />allowing overtopping of the street. <br /> <br />The existing channel and pond west of Pierce Street may remain <br /> <br />unchanged. <br /> <br />Four parallel 4'x6' box culverts are required under <br /> <br />Pierce Street to convey the lO-year flood and yet to maintain <br /> <br /> <br />the present water surface elevation of the existing pond. The <br /> <br /> <br />existing 36-inch pipe downstream from the pond would remain in <br /> <br /> <br />service. <br /> <br />East of Pierce Street a grass lined open channel, as illustrated, <br /> <br />is planned. <br /> <br />The proposed maintenance access roadway would also <br /> <br />serve as a hiker-biker trail. <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 />