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Little River Inlet is a small estuary behind two barrier islands (Waties Island and Bird Island) on the North Carolina-South Carolina border. The bottom is sandy in most of the lower portion of the estuary, and predominantly shelly in the creeks and in the main channel toward the Atlantic Intracoastal Waterway. The region near the mouth has extensive sandy shoals, making navigation in and out of the inlet treacherous. Environmental investigations were conducted at Little River during the spring and summer of 1976 to inventory the benthic communities, wetlands, and shellfish resources in the vicinity of the proposed navigation project. This represents the first comprehensive study of the benthic communities and wetlands of this estuarY. This study was undertaken to provide an environmental assessment of the area prior to initiation of the Little River Navigation Project, which will provide for a stable channel and jetty system into the inlet. The Little River estuary serves as an important nursery area for important species such as penaied shrimp, blue crabs, and finfishes, and is a productive shellfish growing area, although it is presently closed to shellfishing because of water pollution. Little River is an important harbor for recreational craft and party fishing vessels. Because of its significance to recreational and commercial fisheries, the Little River system is important to the economy of the Greater Myrtle Beach area.
The recommended plan of improvement consists of the following: dredging an entrance channel, 300 feet wide and 12 feet deep through the offshore bar, a distance of approximately 5,160 feet; providing an inner channel, 90 feet wide and 10 feet deep from the entrance channel to the Atlantic Intracoastal Waterway, a distance of 11,000 feet; dredging the lower 5,200 feet of the inner channel; dredging an upcoast deposition basin adjacent to the weir section of the north jetty to a depth of -20 feet to provide a capacity of 200,000 cubic yards; constructing a north jetty 3,385 feet long with a low weir section for sand bypassing; constructing sand dikes on both sides of the inlet to tie the jetties to the existng dune line; and possibly constructing a fishing walkway on top of the south jetty. The adverse environmental effects will be temporary increase in turbidity; alteration of existing vegetation during construction of south sand dike; temporary disturbance of birds and mammals in the area; destruction of some benthic organisms by dredge cutterhead; smothering of invertebrates under jetty stone and in beach disposal area; and possible displacement of wildlife species.
This supplement presents detailed descriptions, a revised cost estimate and updated benefits reflecting modifications to the channels, jetties, and weir system that had previously been approved in the General Design Memorandum. The proposed plan in this supplement provides for the construction of an upcoast and downcoast jetty, an upcoast and downcoast 650' weir section, two sand dikes, two deposition basins, an inner channel, and a 45 deg flared entrance channel. The proposed plan has the same general alignment as the GDM Plan, but incorporates some significant design improvements.