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Projects

North Jacksonville 20-Inch Water Main

20-inch water main brings drinking water to Jacksonville’s rapidly growing Northside.
  • Construction crews work to install a 20-inch water main—Gannett Fleming.

    JEA expands water service to provide for growing area of Jacksonville. 

Client
JEA 
Location
Jacksonville, Florida
Our Role
Preliminary and Final Design, Permitting, Bidding, Maintenance of Traffic, Construction Engineering and Inspection.
Data
Size:
8,100 linear feet
Construction Cost:
$1.8 million
Completed:
2011
Type:
New Construction
Duration:
2 years 10 months
Outcomes
  • Improved potable water service to support growth and development
  • Increased reliability of water service to the area
  • Increased service to previously underserved areas.

Once regarded as a quiet, rural community, Jacksonville’s Northside experienced a real estate boom in the early 2010s, with developers scooping up land for commercial and residential projects. Some of the projects were plans that had been previously placed on hold due to the receding national economy. Others were brand new concepts driven by the success of a new regional outdoor shopping center, River City Marketplace.

With increased growth and development came increased demand for potable water service. To keep pace, JEA, Florida’s largest community-owned utility and the eighth largest in the U.S., gave the green light for a new 20-inch water transmission main. This new water main would provide expanded service to support Jacksonville’s burgeoning Northside. 

What We Did

Gannett Fleming prepared the preliminary and final design, and performed permitting, bidding, and construction-phase services for the installation of the 20-inch water transmission main on Jacksonville’s Main Street. 

The new water main was constructed to connect the existing 16-inch water main at Cedar Bay Road and the existing 20-inch water main at Eastport Road. The selected route was along the Florida Department of Transportation’s (FDOT) right-of-way on Main Street and included crossing the Broward River. Due to a labyrinth of existing utilities, the water main was placed on the west side of Main Street; however, connections to the existing water mains were located on the east side of Main Street. Since open-cut construction was not allowed on the FDOT roadway, Gannett Fleming employed trenchless construction methods, including horizontal directional drilling (HDD) and jack-and-bore drilling. Further, the Broward River crossing by HDD was designed between an existing highway bridge and CSX railroad tracks, which required compliance with CSX permit and design standards. Gannett Fleming designed the crossing to accommodate a future utility bridge to be installed in the same location.

Key Features

  • 5,200 LF of 20-inch polyvinyl chloride, American Water Works Association C906, dimension ratio (DR) 25 pipe
  • 1,800 LF of 24-inch high-density polyethylene DR 11 pipe for crossing wetlands and Main Street (US 17)
  • 900 LF of 20-inch coated steel, 0.375-inch thick, American Petroleum Institute, 5L, grade X60 pipe for crossing the Broward River
  • 165 LF of 36-inch steel casing for crossing Main Street (US 17).

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