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Attachment 3 <br /> Forward Landfill - 187.6-Acre Closure Area <br /> Drainage Control System Modifications Cost Estimate <br /> Item Qty 187.6- Total <br /> No. Description Acre AreaF <br /> Unit Costs Cost <br /> 1 Remove Existing Drainage System (1) 1 LS $ 50,000.00 $50,000- <br /> 2 Construct V-Ditch Type 2 (2) 2,048 LF $ 100.00 $204,800 <br /> 3 Drainage Inlets (3) 4 EA $ 2,100.00 $8,400 <br /> 4 Outlet Structures (3) 4 LF $ 3,635.00 $14,540 <br /> 5 Drainage pipe 24" HDPE (3) 920 LF $ 86.00 $79,120 <br /> Subtotal I 1 $356,860 <br /> 6 Miscellaneous arts/materials&shipping 5% 1 LS $ 17 843.00 17,843 <br /> Total Drainage Control S stem Modification Costs $374 703 <br /> NOTES: <br /> Unit prices are based on recent bid for closure of the Jamestown Landfill prepared by Boston Pacific, Inc. (See Attachment No. 1),which <br /> is located within the same region as the Forward Landfill. The majority of permanent drainage control system features will be in-place at <br /> closure, including the perimeter channels, basins, and other features not over refuse. <br /> (1) Includes all drainage control system features over waste within the 187.6-acre closure area (i.e., downdrains, inlets, open channels, <br /> outlets, rip-rap,etc.). <br /> (2) Cost assumes placement of additional perimeter drainage channel along the edge of refuse as part of the 187.6-acre closure area <br /> over 25%of the total possible linear feet surrounding the area or 2,048 If(square root of total area, 2,098,124 sq ft= 1024 x 2 sides <br /> = 2,048 If) . <br /> (3) Cost assumes placement of 4 downdrains (including inlets and outlets) along 4,096 If of slope over a 187.6-acre area, approximately <br /> one every 1,000 If,with each downdrain approximately 230 If from top of slope to bottom (4 x 230 If= 920 If of 24-inch HDPE pipe). <br /> Attach 3 Forward-Drainage Sys Back-up.AsBASC <br />