SR 520 Water Transmission Main Study and Relocation

DRMP was selected to provide comprehensive engineering, surveying and permitting services for 8 miles of 54-inch potable water transmission line. Alternates of ductile iron and pre-stressed concrete cylinder pipe were used in the design. PCCP was the selected pipe. This project is currently under construction; Phase I is 2.5 miles long and Phase II, which includes a stainless steel pipe transmission main bridge crossing the St. Johns River on a separate pipe bridge, is the remaining 5.5 miles. All permits have been obtained for both phases of work. These permits include the FDEP utility permits, SJRWMD Environmental Resources Permits, U.S. Coast Guard Permit, and FDOT Right-of-Way Utilization Permits. Line stops and butterfly valves were also designed in the existing 36-inch and 48-inch mains for future pipeline modifications.

This project is being designed and constructed prior to a major FDOT roadway expansion project along SR 520 so that existing water transmission lines can be relocated to facilitate new roadway construction. As such, extremely close coordination has been maintained with proposed roadway and bridge plans and schedules. A preliminary engineering report prepared by DRMP indicated that the new 54-inch main, along with existing 48-inch and 36-inch mains, will be needed to meet the City's water customer demands exceeding 80 MGD through the Year 2050.