Everglades Restoration C-44 Reservoir- Everglades Restoration

Everglades Restoration C-44 Reservoir- Everglades Restoration

Everglades Restoration

C-44 Reservoir

The restoration of the Everglades has been called one of the most significant environmental projects ever undertaken. One of the key projects within the overall Comprehensive Everglades Restoration Plan (CERP) is the C-44 Reservoir Storm Water Treatment Area Project. This project is designed to provide a means to reduce the impact of those rainfall/runoff events which affect the overall viability of the St. Lucie Estuary(SLE).

Located halfway between Lake Okeechobee and the ocean in Martin County, the completed C-44 reservoir will span 3,400 acres holding water up to 15 feet deep. The above-ground reservoir will provide 50,600 acre-feet of water storage -- the same capacity as 25,000 Olympic-sized swimming pools. The massive water storage area will work together with 6,200 acres of storm water treatment area to capture and treat water before it is released to the C-44 Canal and flows to the Indian River Lagoon and St. Lucie Estuary.

The primary goal of the project is to change the timing and quality of the water discharging into the C-44 canal, resulting in improved water quality to the SLE through the use of over 3,000 acres of reservoir and 6,000 acres of storm water treatment area cells (STA).

The flow regime of the C-44 Canal must be understood so that the reservoir and STA cells can be designed effectively. This understanding is developed through the use of hydrologic, hydraulic models and water quality models. The hydrologic and hydraulic models which are the subject of this paper were used for the simulation of the operations of the C-44 Project, including the evaluation of C-44 Canal flows and water surface elevations, intake canal and pump station hydraulics, reservoir discharge and flow distribution, STA hydraulic performance, and ultimate system discharge.

The main purpose of the C-44 reservoir is to capture and detain C-44 Basin storm water thereby reducing the volume and flow rate of storm water discharging through S-80 into the St. Lucie Estuary.

The capture and attenuation of peak flows in the C-44 Canal potentially helps to reduce the number of extreme events of freshwater discharge to the estuary in conjunction with the other IRL-South components in the Recommended Plan.

The additional structural components required for the C-44 Project to achieve the attenuation goals in the estuary included:

A reservoir pump station on the C-44 Canal with a maximum capacity of 1,100 cubic feet

per second (cfs),

An emergency overflow spillway,

A reservoir draw down structure, and

Pump stations and gated culverts to distribute water from the reservoir to the East and

West STAs and discharge of the treated water to the C-44 Canal.

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