Z--Sandy O&M Supplemental, Maintenance Dredging, 7-Foot Project, Impoundment Basin and Entrance Channel Cut-1. St. Lucie Inlet, Martin County, Florida

Project work consists of maintenance dredging the Federal navigation channel at St. Lucie Inlet and the adjoining impoundment basin to their authorized depths with disposal in the designated beach placement area approximately 4.5 miles south of the inlet between Monuments R-59 and R-75. The work will be divided into a Base and six Additive Bid Items which progressively add work to the Base. The Additive items pertain to dredging incremental volumes of material from the Impoundment Basin up to a maximum volume that corresponds to the total material available within the required plus allowable overdepth prism of the basin. The project will entail the dredging of the entrance channel Cut-1 to the required depth of 16 feet from Station 0+00 to Station 30+00, entrance channel Cut-1 transition from a required depth of 16 feet to a required depth of 10 feet from Station 30+00 to Station 34+00, and entrance channel Cut-1 to a required depth of 10 feet from Station 34+00 to Station 42+00; dredging of the transition area located between entrance channel Cut-1 and impoundment basin to a required depth of 8 feet from Station 30+00 to Station 42+00; and dredging the impoundment basin, Station 30+00 to Station 47+50, to a required depth of 16 feet. All areas will incorporate an additional 2 feet allowable overdepth beyond the required depths. Estimated quantities to be dredged are shown on the Line Items and Pricing Schedule, Section 00010-A. Work also includes beach tilling, turbidity monitoring, and manatee observers (if required).