USACE opens public comment on proposed FONSI for C-111 South Dade Conveyance Project S-332B & S-332C pump station replacements
The U.S. Army Corps of Engineers (USACE) Jacksonville District will accept public comment on the supplemental proposed Finding of No Significant Impact (FONSI) for the design changes to the C-111 South Dade Conveyance Project, S-332B and S-332C pump station replacements. The pump stations will be constructed in Miami-Dade County, approximately 300 feet south of the current temporary pump stations. Comments are due October 30.
The proposed changes in pump station design include:
a. The construction of a long (approximately 3,216 linear feet) discharge channel in lieu of a short (approximately 2,029 linear feet) discharge channel and corresponding increase in footprint size
b. The change in pump composition to three 250 cubic feet per second (cfs) diesel pumps and two 75 cfs electric pumps
The project’s non-Federal sponsor is the South Florida Water Management District.
The 2020 Final General Reevaluation Report (GRR) and Environmental Assessment (EA) (the 2020 Final GRR/EA), which the FONSI is supplementing, evaluated various alternatives that would support the replacement of two temporary pump stations that were constructed under the 1996 project authorization and in response to the 1999 Jeopardy Biological Opinion on the Cape Sable Seaside Sparrow (CSSS).
The recommended plan identified in the 2020 Final GRR/EA was Alternative 3 - Short Concrete Channel; however, based on new seepage modeling conducted since completion of the 2020 Final GRR/EA, the proposed action is being revised, and Alternative 2 - Extended Concrete Channel, has now been chosen as the selected plan. The supplemental FONSI identifies that no additional environmental impacts will occur as a result of this shift that were not already identified in the 2020 Final GRR/EA.
The proposed FONSI is available for review:
C-111 South Dade Project; Replacement of Current Pump Stations S-332B and S-332C (Sept. 28, 2023)
Note: large files may take a few minutes to open
Notice of Availability
Appendix B: Seepage Modeling
Appendix C: Pertinent Correspondence
From June 2020 archive for reference:
Final Integrated GRR and EA with signed FONSI
Please submit public comments to Samuel.H.Hans@usace.army.mil by October 30, 2023.
Public Comment due February 27, 2020 for C-111 South Dade Project, Replacement of Interim Pump Stations S-332B and S-332C Project Documents
Please submit public comments to Bradley.A.Foster@usace.army.mil by February 27, 2020, or mail them to:
U.S. Army Corps of Engineers
701 San Marco Boulevard
Jacksonville, Florida 32207-8915
The U.S. Army Corps of Engineers, Jacksonville District, will accept public comment on the Draft Integrated General Re-Evaluation Report, Environmental Assessment and Proposed Finding of No Significant Impact (FONSI) for the Canal 111 South Dade (C-111 SD) Project.
Note: due to large file sizes, documents may take a few minutes to download.
Draft Integrated GRR and EA
Appendix A: CZMA
Appendix B: Section 404(b)
Appendix C: Pertinent Correspondence
Status as of July 2018
Two construction contracts are currently ongoing at the C-111 South Dade project:
- Contract 8A: Awarded in September 2016, this contract involves constructing internal flow-way berms with weirs and making modifications to infrastructure that will help connect the C-111 South Dade project to the MWD project.
- Contract 9: Awarded in March 2017, this contract, administered by the South Florida Water Management District, involves constructing plugs in the L-31W canal and creating an integral weir to reduce seepage out of ENP.
The connection between the North Detention Area and 8.5 Square Mile Area was completed 8 July 2018. This provides additional flexibility to move water through the C-111 South Dade system.
Environmental documents for C-111 South Dade project features available - December 7, 2016
The final environmental documents for project features being constructed as part of the C-111 South Dade project are now available. Comments were accepted through September 4, 2016.
The Environmental Assessment (EA) and Finding of No Significant Impact (FONSI) evaluated options for plugging the L-31W Canal, building culverts to the west, and modifying existing structures, including the gap in the L-31W levees, as part of construction contract for the project, known as Contract 9. Based on this evaluation, it has been determined that no significant impacts are anticipated. Contract 9 is scheduled to be awarded in spring 2017.
Corps awards contract for C-111 South Dade Project - September 26, 2016
The U.S. Army Corps of Engineers Jacksonville District has awarded one of the two remaining construction contracts for the C-111 South Dade project, an Everglades restoration project in Miami-Dade County, Florida.
Environmental documents for proposed modifications to C-111 South Dade project features available - June 24, 2016
The Environmental Assessment (EA) and Finding of No Significant Impact (FONSI) for proposed modifications to the C-111 South Dade North and South Detention Areas and Associated Features are now available. These documents were available for public and agency review through March 29, 2016.
The completed Environmental Assessment determined that no significant impacts are anticipated as a result of the proposed construction and/or modifications to features associated with the C-111 South Dade project, in accordance with the C-111 South Dade project purposes. These proposed modifications will be incorporated into future construction contracts for the project, with one contract anticipated to be awarded later this year.
Corps breaks ground on North Detention Area for Everglades project - Jan. 7, 2016
The U.S. Army Corps of Engineers, alongside federal, state and local officials, celebrated the start of construction on one of the three remaining contracts for the C-111 South Dade project, an Everglades restoration project in Miami-Dade County Jan. 7, 2016.
The contract, known as Contract 8, involves constructing the North Detention Area, which will connect the C-111 South Dade project to the Modified Water Deliveries to Everglades National Park project. These projects are Foundation Projects, which the Comprehensive Everglades Restoration Plan (CERP) builds upon to deliver essential restoration benefits to America’s Everglades.
Corps awards contract for C-111 South Dade project - Oct. 29, 2015
The U.S. Army Corps of Engineers Jacksonville District has awarded one of the three remaining construction contracts for the C-111 South Dade project, an Everglades restoration project in Miami-Dade County, Fla.
The $13.9 million construction contract was awarded to the Polote Corporation from Savannah, Ga., on Oct.29. The contract, known as Contract 8, involves constructing a detention area that will connect the C-111 South Dade project to the Modified Water Deliveries to Everglades National Park (Mod Waters) project. Construction and operation of the C-111 South Dade Contract 8 components are necessary to maximize restoration objectives of the Mod Waters project.
Construction and operation of these components are also necessary to raise the maximum operating limit of the L-29 Canal under Increment 2 of the G-3273 and S-356 Pump Station Field Test. The data collected during this water operations field test will assess how newly-operational project infrastructure integrates with the current water management system, and how to maximize ecological restoration objectives.
The information obtained from the first two increments will be used in the development of the Combined Operating Plan, a comprehensive integrated water management plan for the southern portion of the Everglades ecosystem. Increment 1 of the field test began Oct. 15, 2015, and is planned for approximately two years, with a minimum duration of one year.