Concrete Cylinder Pipe Condition Assessment: Miami

Client: Miami Dade Water and Sewer Department
Location: Miami, FL

Following the rupture of a 54” water main, Hazen and Sawyer supported Miami Dade Water and Sewer with visual and electromagnetic inspection of the affected main, along with planning for the prioritization and assessment of prestressed concrete cylinder pipe (PCCP) throughout the county.

The ruptured 54-inch main provided the water supply for the City of Hialeah and north Miami-Dade County.

The break and subsequent flood created a sinkhole 10 feet deep by 40 feet wide in a major intersection and flooded adjacent houses with a foot of water.

The water main was part of a 48-inch loop around the northern portion of the County.

As part of a wire continuity test, we located damaged pipe using measuring wheel and sonde, removed outer mortar and exposed wires and checked continuity between wire wraps to identify broken wires.

We conducted a visual and sounding inspection of the pipeline interior to confirm electromagnetic survey results and verify that the correct segments had been identified for repair.

Project Outcomes and Benefits

  • Conducted a visual and sounding inspection of the pipeline interior.
  • Studied alternatives for the condition assessment of other PCCP pipe throughout the system.
  • Developed a PCCP pipe inventory of the Department’s water system.
  • Estimated failure rates for the next 5, 10 and 100 year periods to assess risk.
  • Helped the county develop a long term assessment and replacement program that includes 15 miles of prioritized inspection per year.

For more information on this project, or to discuss a similar project in your area, contact Ethan Heijn at eheijn@hazenandsawyer.com