The South Florida Water Management District selected Erdman Anthony to design and construct a fully automated, electrically operated two-gate spillway, with a peak capacity of 1,150 cubic feet per second, to be built adjacent to the existing S-333 structure at the intersection of the L-67A and L-29 canals, Section 3, in Miami-Dade County. The purpose of the new S-333N structure is to provide additional operational flexibility and conveyance of flows to Everglades National Park (ENP).
The new S-333N structure will work in conjunction with the existing S-333 structure to increase hydraulic connectivity between Water Conservation Area-3A (WCA-BA) and ENP. The design flow was established to reach a combined conveyance with the existing S-333 structure (1,350 cubic feet per second) of 2,500 cubic feet per second. The project may also include modifications to the L-67A and L-29, Section 3 levees and canals.
The Central Everglades Planning Project (CEPP) includes a suite of storage, treatment, conveyance, and seepage management measures that will provide the necessary components to deliver additional fresh water south, from Lake Okeechobee to WCA 3, ENP, and Florida Bay. Once implemented, the project will restore more natural quantity, quality, timing, and distribution of water flows to the remaining portions of the River of Grass.
The Final Integrated Project Implementation Report was published in the Federal Register in July 2014; the Chief of Engineers Report was signed in December 2014; and the Record of Decision was signed in August 2015. The project received Congressional authorization in December 2016 and is awaiting appropriations. The S-333N structure is the first component of the CEPP to move forward.
The design process included:
- Design calculations, plans, specifications, opinions of probable construction costs, construction schedule, operations plan, and the design for the required submittals (preliminary, final, and corrected final/ RTA), in accordance with Everglades Restoration and Capital Projects Engineering Submittal Requirements.
- Presentations for briefings and meetings with the South Florida Water Management District, Design Review Team, and project stakeholders.
Click below to watch a video of the detonation of 30 blast holes that make way for a new spillway site.