Laserfiche WebLink
Dredge Depth - 5 feet <br />Theoretical Navigation Limits <br />^ A boat with a draft of 3.3' will be able to navigate the <br />channel dredged to a depth of 5 feet at tides of -0.5 and <br />higher (3.3' draft + 1.2' clearance) 97% of the calendar <br />year <br />^ Each year approximately 12" of silting is deposited <br />^ In the second year the same boat can only navigate <br />portions of the channel at tides of + D.5' or higher, 90% <br />F.--~ of the time <br />^ Similarly, in Year 3 navigation is restricted to 80% of the <br />time <br />4 And in Year 4 navigation is restricted to 69% of the time <br />^ And in Year 5 navigation is restricted to 53°/ of the time <br />Modified Dredge Estimated Costs <br />^ Pre 8 Post Surveys $ 50,000 <br />~ Environmental Permitting $ 60,000 <br />Sediment Sampling $ 50,000 <br />^ Design Phase $ 45,000 <br />^ Dredge (50,000 cy) $ 400,000 <br />^ Dredge Removal (50,000 cy) $ 1,200,000 <br />^ Contingency (10%) $ 160,OD0 <br />^ Const. Support $ 160,000 <br />TOTAL $2,125,000 <br />4 <br />