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Description of Proposed Improvements: Sheet 4 Estimated Cost of Proposed Improvements: Sheet 4 (Reach F) Quantity Unit Price I I I I I I I I I I I I I I I I I I I Item Description The natural drainage route through this area was probably never well defined, since flow rates would be very low. CONSTRUCTION 42" Storm Sewer 48" Storm Sewer 5411 Storm Sewer Asphalt over 42" Pipe Asphalt over 48" Pipe Manholes Inlets Inlet Pipe Asphalt over Inlet Pipe Graded Earthen Channel The channel has nevertheless been additionally blocked by development and regrading such that the anticipated flooding is meandering, wide- spread, and shallow. It is proposed that a storm sewer system, ranging in size from 42-inch to 54-inch in diameter, be construc- ted to convey the 10-year flood. A large capacity inlet is required on Quail Street to collect the surface flow at the upstream end of the system. Numerous storm sewer inlets are required, where shown. Because there is no east-west street Construction Sub-total 15% Engineering 10% Contingencies Total Construction through the area, a substantial right-of-way acquisition will be required, as indicated. Several large commercial buildings will continue to lie within the lOO-year flood plain after the construction of the facilities. It is anticipated that a relatively minor amount of regrading or flood proofing could remove the structures from the flood plain, and thus make possible future expansion or redevelopment. LAND ACQUISITION Easements Along Pipe Lines 10% Contingencies 5% Legal Total Land Acquisi tioD TOTAL COST Unit Cost 1,300 L.F. $ 60 $ 78,000 880 L.F. 71 62,480 90 L.F. 85 7,650 930 L.F. 20 18,600 880 L.F. 21 18,480 6 Ea. 1,000 6,000 12 Ea. 1,000 12,000 490 L.F. 30 14,700 290 L.F. 18 5,220 30 C.Y. 3 90 $223.220 33,483 22,322 $279,025 2,270 15 34,050 3,405 1,702 $ 39,157 $318,182 L.F.