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<br />Comments on Sheet 1 of 18 <br />Reach L-13 (Station 470+00 to 450+00 <br />The existing structures under the access road and the Mobile Premix quany road are 48" and 60" diameter CMP <br />culverts, respectively, with capacity for less than the 100-year flow. The access road and quarry road would be <br />overtopped during the 100-year flood. The existing natural channel generally has adequate capacity for the 100- <br />year flow. No residential or commercial structures are located in the floodplain in this reach. <br />The recommended improvements for this reach include erosion control structures to stabilize the channel and arrest <br />streambed degradation caused by the steep channel slopes and high velocities. The structures should help protect <br />downstream water quality by reducing the amount of sediment transported in the flow. <br /> <br />REACH L-13 - SHEET 1 <br />Item Description Quantitv Unit Unit Price Cost <br />F.rn<:inn COl1..tm1 Stru,ctures - - - - - - <br />- Includes excavation, backfill, seeding & restoration 16 EA 7000 112,000 <br />Total Construction Cost 112,000 <br />- 15% Engineering 16,800 <br />- 20% Contingencies 25.800 <br />TOTAL COST 154,600 <br /> <br />