This project includes six separable elements including Pal-Mar and J.W. Corbett Wildlife Management Area Hydropattern Restoration, L-8 Basin Modifications, C-51 and L-8 Reservoir, Lake Worth Lagoon Restoration, C-17 Backpumping and Treatment, and C-51 Backpumping and Treatment. These separable elements have been combined into a single project to address the interdependencies and tradeoffs between the different elements and provide a more efficient and effective design of the overall project.

a) Pal-Mar and J.W. Corbett Wildlife Management Area Hydropattern Restoration Other Project Element (OPE).
This separable element will consider improvements such as new or modified water control structures, canal modifications and the acquisition of 3,000 acres located between Pal-Mar and the J.W. Corbett Wildlife Management Area in Palm Beach County.

The purpose of this separable element, described in the CERP, is to provide hydrologic connections between the J. W. Corbett Wildlife Management Area and: (1) the Moss Property, (2) the C-18 Canal, (3) the Indian Trail Improvement District, and (4) the L-8 Borrow Canal, in addition to extending the spatial extent of protected natural areas. These connections would reduce detrimental effects due to over inundation on native vegetation frequently experienced during the wet season and extend the footprint of the contiguous greenbelt to 126,000-acres. This greenbelt extends from the Dupuis Reserve near Lake Okeechobee across the J.W. Corbett Wildlife Management Area and south to Jonathan Dickinson State Park.

b) L-8 Basin Modifications (K - Part 1).
This separable element involves modifications to the L-8 Basin including a series of pumps, water control structures, and canal capacity improvements in the M canal. The purpose of this project is to construct the required conveyance to make the C-51 and L-8 Reservoir (see below) functional and thereby increase water supply availability while maintaining or enhancing flood protection for northern Palm Beach County areas. This component will also provide conveyances necessary to deliver flows required to enhance hydroperiods in the Loxahatchee Slough; increase base flows to the Northwest Fork of the Loxahatchee River, and reduce high discharges to the Lake Worth Lagoon.

c) C-51 and L-8 Reservoir (GGG).
This separable element includes a combination above ground and in-ground reservoir with a total storage capacity of approximately 48,000 acre-feet located immediately west of the L-8 Borrow Canal and north of the C-51 Canal in Palm Beach County. The initial design for the reservoir assumed a 1,800-acre reservoir with 1,200 usable acres with the water level fluctuating from 10 feet above grade to 30 feet below grade. The final size, depth and configuration of this facility will be determined through more detailed planning and design.

The purpose of this project is to increase water supply availability, and attenuate discharge to the Lake Worth Lagoon and provide ancillary drainage benefits for northern Palm Beach County areas. It will also provide flows to enhance hydroperiods in the Loxahatchee Slough; increase base flows to the Northwest Fork of the Loxahatchee River, and reduces high discharges to the Lake Worth Lagoon. Water will be pumped into the reservoir from the C-51 Canal and Southern L-8 Borrow Canal during the wet season, or periods when excess water is available, and returned to the C-51 and L-8 during dry periods. Additional projects will also direct excess water into the West Palm Beach Water Catchment Area (also known as the Grassy Waters Preserve). This component or portions of this component may be implemented under a previous authorization.

d) Lake Worth Lagoon Restoration (OPE).
This project includes sediment removal in the C-51 Canal and sediment removal or capping within a distance of 2.5 miles downstream of the confluence of the C-51 Canal and the Lake Worth Lagoon. A prototype project will be conducted to determine the feasibility and potential cost of removing and disposing of sediments in the lagoon versus capping them. This project includes the evaluation of sediment traps to reduce future accumulation of sediment.

The purpose of this project is to improve water quality and allow for the reestablishment of sea grasses and benthic communities. The elimination of the organically enriched sediment from the C-51 Canal discharge will provide for long term improvements to the Lagoon and enable success for additional habitat restoration and enhancement projects planned by Palm Beach County.

e) C-17 Backpumping and Treatment (X).
This project includes backpumping facilities and a stormwater treatment area (STA) with a total storage capacity of approximately 2,200 acre-feet located in northeastern Palm Beach County. The design assumes a 550-acre STA with the water level fluctuating up to 4 feet above grade. The final size, depth and configuration of this facility will be determined through more detailed planning and design, and will address appropriate pollution load reduction targets necessary to protect receiving waters (e.g. West Palm Beach Water Catchment Area).

The purpose of this project is to increase water supplies to the West Palm Beach Water Catchment Area and Loxahatchee Slough by capturing and storing excess flows currently discharged to the Lake Worth Lagoon from the C-17 Canal. Excess C-17 Canal water will be backpumped through existing canals and proposed water control structures to the STA which will provide water quality treatment prior to discharge into the West Palm Beach Water Catchment Area.

f) C-51 Backpumping and Treatment (Y).
This project includes back-pumping facilities and an STA with a total storage capacity of approximately 2,400 acre-feet located in Palm Beach County. The design includes a 600-acre STA with the water level fluctuating up to 4 feet above grade. The final size, depth and configuration of this facility will be determined through more detailed planning and design, and will address appropriate pollution load reduction targets necessary to protect receiving waters (e.g. West Palm Beach Water Catchment Area).

The purpose of this project is to increase water supplies to the West Palm Beach Water Catchment Area and Loxahatchee Slough by capturing and storing excess flows currently discharged to the Lake Worth Lagoon from the C-51 Canal. The conceptual design allows excess C-51 Canal water to be backpumped through existing and proposed water control structures and canals to the STA. The STA will provide water quality treatment prior to discharge into the West Palm Beach Water Catchment Area.