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<br />002161 <br /> <br />:i <br /> <br />l: <br /> <br />tl <br />It <br />~ <br />;) <br />~ <br />[I <br />[I <br />~I <br />,I <br />i~ <br /> <br />Three options were considered to remedy this situation: <br /> <br />1) Completely remove the existing levee and trees and <br />rebuild the levee to Corps of Engineers standards. <br />This would require the excavation and replacement <br />with compacted fill of about 118,500 cubic yards of <br />material and approximately 10,370 cubic yards of <br />riprap. This work would be coordinated through the <br />Corps of Engineers but would take about 15 months to <br />get started. <br /> <br />2) Excavate about a 20 foot deep trench down the center <br />of the existing levee and refill with slurry <br />enillankment. Approximately 2,962 cubic yards of <br />material would need to be excavated, mixed with soil <br />cement and refilled. The trees would remain in the <br />levee but may suffer minor root damage. <br /> <br />3) Construct a secondary ring dike 3 feet high behind <br />the existing levee similar to the idea used in the <br />actual emergency. The secondary dike could rest <br />against the levee or be separate. The existing <br />asphal t bike path could eventually be incorporated <br />into the top of the dike and the side slopes could, <br />be made flatter for aesthetic purposes. Approxi- <br />mately 4,222 cubic yards of compacted fill is <br />required for this option. <br /> <br />Upstream of Cole Park the levee protects a residential <br />area where the lots appear to extend to the center of the <br />levee, Several fences, dense vegetation, and power poles <br />severely restrict access along the top of this part of the <br />levee system. <br /> <br />Cost Estimates <br /> <br />Option 1 <br />Option 2 <br />Option 3 <br /> <br />- $1,362,837 <br />$ 112,563 <br />- $ 37,154 <br /> <br />Reconunendations <br /> <br />Option 3 is recommended as the best practical short-term <br />solution to the emergency. This work should qualify for state <br />disaster funding. <br /> <br />The Corps of Engineers should be requested to evaluate <br />the feasibility of Options 1 or 2 under a Section 14 project. <br /> <br />If they have not already done so, the city or the <br />should acquire (by eminent domain if necessary) right of <br />a utility easement for the levee system. Existing <br />should be removed to provide access during flood fights. <br /> <br />county <br />way or <br />fences <br /> <br />73 <br />