Leith Creek, Scotland County, North Carolina, Detailed Project Report. Revised.
CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT
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A combination of structural and non-structural flood control measures have been determined to be the best solution for the Leith Creek flood problem. The best plan to provide a high degree of protection to the Leith Creek basin would involve construction of channel conveyance improvements at an estimated first cost of 181,000 and an estimated average annual cost of 13,900. Total average annual benefits from this plan are estimated at 23,250. Adverse environmental effects are minimal due to the relatively small size of the project and environmental gains are produced by the recommendation of bridge modifications which in the past have reduced natural channel capacities. Recreational facilities consisting of a greenway with bike trail, picnic facilities and park benches are also recommended as part of the proposed plan. The estimated additional first cost for providing these facilities is 18,200 which would be apportioned on a 5050 cost basis between Federal and non-Federal interests. Average annual cost of recreational facilities is estimated to be 1,700. Total average annual recreational benefits are estimated at 2,600. Total first cost of the flood controlrecreation plan is 199,200. Average annual costs of 15,600 when compared to annual benefits of 25,850 yield a benefit-to-cost ratio of 1.66.
- Civil Engineering