The project was for the widening of two miles of SR 80 from two lanes to four lanes, and the design of a new interchange to replace the existing SR 80/US 27 at grade intersection. The final typical section included two 12-foot lanes in each direction separated by a 64-foot grass median.
Improvements included upgrading the existing intersection of SR 80 and US 27 to an elevated “T” interchange, which addressed safety concerns with the existing intersection, including sight distance constraints, high running speeds, and grade issues. The existing US 27 curve (a four lane section) was designed to be reconstructed to the east (no new travel lanes) to current standards. The interchange includes three ramps. A combination of MSE walls and embankment was used for elevated portions of the roadway.
Drainage and permitting for this project included TMDL evaluation, base clearance, agricultural operations, floodplain compensation, and endangered species. Close coordination with SFWMD, FDEP and two 298 Water Control Districts (WCDs) enabled Volkert to proceed with advanced ERP permitting. Volkert obtained authorization from the WCDs and the adjacent property owner to not provide floodplain impact compensation, secured the WCDs approval of proposed bridge and culvert improvements, and approval from FDEP and the WCDs to waive limiting discharge criteria.
A PD&E reevaluation was required due to alignment modifications recommended during the project Value Engineering study. The reevaluation consisted of environmental and engineering components, supporting documentation, and was completed on an accelerated schedule.
Scope of Work: Site Survey, Roadway Design, Structural Design, Lighting Design, Drainage Design, Utility Relocation, Permit Expediting, Environmental Coordination