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<br />Conceptual Alternative Improvements <br />Improvement Scenario Amount Installation Total <br /> Costs Costs <br />100-Year Comprehensive Improvements <br />Revetment with Toe Protection 2800 LF $823,200 <br />Riprap Key at Ends 4 $6,720 <br />Pre-formed Boulder Grade Control 1 $22,512 <br /> Excavation - $6,000 $858,432 <br />100-Year COOT & COOW Assistance" <br />Revetment with Toe Protection 1400 LF $411,600 <br />Riprap Key at Ends 4 $6,720 <br /> Excavation -- $3,000 $421,320 <br />100-Year Minimum Improvements <br />Revetment with Toe Protection 900 LF $264,600 <br />Riprap Key at Ends 2 $3,360 <br />Pre-formed Boulder Grade Control 1 $22,512 <br /> Excavation -- $3,000 $293,472 <br />Minimum Improvements - Toe Protection Only <br />Toe Protection (1 ton per foot) 900 LF $37,800 <br />Pre-formed Boulder Grade Control 1 $22,512 <br /> Excavation - $3,000 $63,312 <br /> <br />"Assumes that downstream riprap and excavation will be paid for by CDOT. <br />Assumes that Pre-formed Boulder Grade Control will be paid for by CDOW. <br /> <br />A'i'lA-Clif1'l6Al'/ F <br />