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<br />COMMENTARV <br />SHEET 12OF45 <br />STATION 1586+00 TO STATION 1730+00 <br />REACH 3 <br /> <br />COST ESTIMATE <br />SHEET 12 OF 45 <br />SOUTH PLATTE RIVER <br />STATION 1686+00 TO STATION 1730+00 <br /> <br />CONSTRUCTION <br /> <br />This reach includes a golf course and the confluence with Bear Creek on the <br />IMt bank. The area on the left bank near the confluence with Bear Creek <br />has been designated as a wildlife preserve and the channel on the right <br />bank next to the golf course has retained its natural appeara.nce. There <br />are no flooding problems in this reach. <br /> <br />Drainage improvement costs <br />Street crossing costs <br />Utility relocation costs <br />Total construction costs <br /> <br />Engineering and contingencies <br />(30% of total construction costs) <br /> <br />The recommended plan is to preserve the natural channel and prevent erosion <br />damage. Between Stations 1692 and 1708 on the right bank the bank 1s being <br />undercut. The recorrmendation is to cut back the slope to a more natural <br />a.ngleof repOSe and pldnt natural veqetationon the new slope. Itmaybe <br />necessary to place riprap at the toe of the slope to prevent further ero- <br />Sion. On the left bank between Stations 1687 and 1710 where the bank has <br />been disturbed by construction it should be planted with natural vegeta- <br />tion. An existing jetty on the left bank at approximately Station 1696 <br />should be preserved to provide erosion protection. <br /> <br />Property acquisition <br /> <br />TOTAL IMPROVEMENT COSTS <br /> <br />Operation and Maintenance <br /> <br />The floodplain management strategy for this reach is to preserve its open <br />space character. <br /> <br />$54,500 <br /> <br />54,500 <br />16;350 <br /> <br />$70,850 <br /> <br />S6,130 <br />