® was installed by a combination of slipline rehabilitation and open cut replacement." />

Virgin Islands Water and Power Authority Uses 20" Fusible C-905® Pipe to Rehabilitate Water Main along Historic St. Thomas Waterfront

The U.S. Virgin Islands, located in the Leeward Islands of the Lesser Antilles, consist of the main islands of St. Croix, St. John, and St. Thomas. With a population of over 51,000 and a heavy influx of visitors year round, St. Thomas functions as the tourism hub for the three islands. A safe, reliable supply of potable water is essential to maintaining the vibrant local economy.

In 2008, Virgins Island Water and Power Authority (WAPA) contacted Underground Solutions, Inc. (UGSI) to explore the feasibility of using Fusible C-905® PVC pipe to rehabilitate an existing 24" ductile iron water main beside St. Thomas Harbor. Installed during the 1970's, sections of the water main along the seawall abutting St. Thomas Harbor were experiencing an increasing rate of leaks, requiring costly and disruptive repairs along one of the busiest pedestrian and auto thoroughfares on the island. WAPA concluded it was time to implement a more permanent solution.

Following a condition assessment and design evaluation, WAPA selected 20" Fusible C-905® PVC pipe to be installed by a combination of slipline rehabilitation and open cut replacement. Given the direct proximity of the water main to the seawater, Fusible PVC®'s corrosion resistance and thermally butt-fused, fully-restrained, leak-free pipe system were important factors in WAPA's selection process.

Pipeline Details and Project Summary
  • Owner:
  • Project:
  • Location:
  • Engineer:
  • Contractor:
  • Pipe:
  • Service:
  • Installation (Slipline):
  • Installation (Open Cut):
  • Pressure Test:
  • UGSI Contact:
  • Virgin Islands Water and Power Authority
  • St. Thomas Water Main Rehab
  • St. Thomas, U.S. Virgin Islands
  • Virgin Islands Water and Power Authority
  • GEC, LLC, St. Croix, USVI
  • 3,760 LF of 20" DR18 Fusible C-905®
  • Water Transmission
  • 3 Segments; 1,000', 640' and 480'
  • 5 Segments totaling 1,640'
  • 150psi for 2 hours
  • Robert Tatum (941) 320-2440 rtatum@undergroundsolutions.com

GEC, LLC of St. Croix was awarded the contract by WAPA following a competitive bid process. Several segments were sliplined, including a 1,000 LF section along and behind the seawall bulkhead. Other segments were installed by open cut to accommodate two storm drain crossings. UGSI performed all fusion services and provided construction supervision support to GEC throughout the project.

Lonnie Hartman, Project Manager for GEC, remarked: "We were very impressed with Fusible PVC® pipe. The ability to minimize the number of connections and PVC's corrosion resistance made it ideal for this application."

Construction for the overall project was completed in mid-2010, with the lines pressure tested and placed into service.