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Table 1 <br />Option 1 A (Bridge) <br />Option I - Grade 13112-02-00 FL to Drain East & Bridge at Canada St. <br />Item <br />No. <br />Item Description <br />I <br />Unit <br />I <br />Estimated <br />Quantity <br />Unit Price <br />Total Cost <br />B112-02-00 Disconnect & Dam at 13112-00-00 <br />15 <br />Remove & Dispose of Existing Concrete Slope <br />Pavement <br />CY <br />128 <br />$ 6.70 <br />$ 855 <br />16 <br />Excavation (Channel) <br />CY <br />366 <br />$ 4.80 <br />$ 1,756 <br />17 <br />Embankment <br />CY <br />1,170 <br />$ 7.50 <br />$ 8,775 <br />18 <br />15" Reinforced Concrete Riprap, 2 Slopes at 2:1, <br />Av. Depth 8.6, (Include Subgrade Work) <br />CY <br />21 <br />$ 270 <br />$ 5,610 <br />19 <br />Concrete Low Flow Section (1V wide) <br />CY <br />20 <br />$ 300 <br />$ 5,926 <br />Subtotal B112-02-00 Disconnect & Dam at <br />B112-00-00: $ 22,923 <br />B509-03-00 Detention Basin (166 ac Area at 0.65 ac-ftlac = 91.3 ac-it Required) <br />20 <br />Detention Excavation <br />CY <br />147,300 <br />$ 4.00 <br />$ 589,200 <br />21 <br />Interceptor Structures <br />EA <br />8 <br />$ 2,500 <br />$ 20,660 <br />22 <br />Inflow 1 Outfall Structure <br />EA <br />1 <br />$ 8,000 <br />$ 8,000 <br />Subtotal B509-03-00 Detention Basin (166 ac Area at 0.55 <br />ac-ftlac = 91.3 ac-ft Required): $ 617,860 <br />SWPPP Estimated at 10% x Cost <br />23 <br />SWPPP <br />EA <br />1 $ 287,509 <br />$ 287,509 <br />Subtotal Option I - Grade 13112-02-00 FL to Drain East & Bridge at Canada St.: <br />$ 3,176,278 <br />25°Io Contingency: <br />$ 794,069 <br />Total Construction Estimate Option JA <br />$ 3,970,347 <br />Note: These estimates are to aid City of La Porte staff for planning purposes only. Unit prices and quantities <br />are approximate and subject to change. Engineering design methods were not performed to develop <br />estimates, presented herein, and shall not be used for bidding purposes. Actual construction estimates shall <br />be determined based on performing professional engineering design services. <br />Klotz Associates Project No. 0 127, 011. 000 13112-02-00 Drainage Study <br />July 2009 2 of 2 City of La Porte <br />