US Army Corps of Engineers
Jacksonville District

CERP Indian River Lagoon-South (C)

March 2018


Indian River Lagoon-South

Construction General (C)

Congressional Districts: 17, 18, 20, 21, 22, 23, 24, 25




Congress authorized the Indian River Lagoon-South (IRL-S) project in the Water Resource Development Act of 2007. The Indian River Lagoon is identified as one of the most biologically diverse estuarine systems in all of the continental United States. The project will reduce the damaging effects of watershed runoff; reduce high-peak discharges; reduce nutrient loads; provide water-quality benefits to control salinity, pesticides, and other pollutants presently discharged to the estuary; and provide water supply for agriculture to offset reliance on the Floridian Aquifer. The project includes about 170,000 acre-feet (ac-ft) of new water storage in reservoirs (C-44 Reservoir, C-23/24 North/South Reservoirs and C-25 Reservoir) and storm water treatment areas (STA) (STAs C-44 West/East, C-23, C-24, and C-25); additional water storage on about 92,000 acres of natural storage areas (Allapattah, Palmar, and Cypress Creek); removal of 7,900,000 cubic yards of muck from the St. Lucie River and Estuary; and construction of artificial oyster habitat in the lagoon.


Estimated Total Cost $3,700,000
Estimated Federal Cost $1,900,000
Allocation thru FY16 $769,351,000
Allocation for FY17 $48,810,000
President’s Budget FY18 $57,945,000


South Florida Water Management District (SFWMD)
3301 Gun Club Road
West Palm Beach, Florida 33406


The Corps completed construction of the first of four contracts for the C-44 Reservoir and STA component of the Indian River Lagoon South project in July 2014. The Corps awarded a $198 million dollar construction contract for the 50,600 acre-ft C-44 Reservoir in September 2015. The non-federal sponsor, the SFWMD, awarded the C-44 Stormwater Treatment Area for $101 million dollars and the C-44 Pump Station contract for $40 million dollars in Oct 2014 and Apr 2015, respectively. Completion of the entire C-44 Reservoir and STA project feature is scheduled for November 2020. Pre-design surveys were re-initiated in FY18 for the C-23/24 North Reservoir. Construction completion of the entire IRL-South project is scheduled for FY2030.

 Map of Indian River Lagoon-South project area.