Central Everglades Planning Project (CEPP) Contract 11B, Everglades Agricultural Area (EAA) A-2 Reservoir Embankment and Structures, Palm Beach County, FL.

The U.S. Army Corps of Engineers, Jacksonville District, has awarded contract W912EP24C0018 for Central Everglades Planning Project (CEPP) Contract 11B, Everglades Agricultural Area (EAA) A-2 Reservoir Embankment and Structures, located in Palm Beach County, FL. The work includes the following features: Clearing, grubbing, de-mucking/removal of overburden, blasting, excavation, and processing of several million cubic yards of earthen material for the construction of a 17.75 miles-long D-623 embankment dam. Embankment height will be 38.0 ft above average natural grade in the north, east, and west: and 34.0 ft above average natural grade in the south. Work will also include construction of four multi-barrel, gated outlet-work structures (S-624, S-625, S-626, and S-628), one un-gated overflow spillway section (S-627), as well as one multi-bay, gated inline-spillway (S-629).In addition, the work will include rock foundation preparation, installation of a seepage cutoff wall, canal filling, and all incidental related work to prepare approximately 2 miles of foundation for the 17.75 miles-long D-623 embankment dam. Rock foundation preparation and cutoff wall installation for the remaining 15.75 miles will be completed by others prior to this contracts conclusion. The approximate toe to toe width of the foundation is 260 feet in the north, east, and west; and 235 feet in the south. Lastly, the work will include construction of approximately one mile of parallel open channels (canals) as well as a maintenance road with benches between the canals. The northern most canal (C-636 seepage canal) will have a bottom width of 10 feet, 2.5H:1V side slopes, and a depth of 16.5 feet below average natural ground surface. The southernmost canal (C-623 Inflow/Outflow canal) will have a bottom width of 55 feet, 2.5H:1V side slopes, and a depth of 16.5 feet below average natural ground surface. The maintenance road and benches will separate C-623 and C-636 by approximately 65 feet and will have a minimum crest width of 14 feet 4.5 feet above average natural ground surface. Surface and subsurface water management will be required to control surface and groundwater levels and conduct work in the dry at various locations within the construction limits in accordance with applicable contract specifications.