A failed fusion at the Tropical Avenue Project in Pittsburgh in 2020 set off a chain of events that ended six years later with state regulators slapping Columbia Gas of Pennsylvania with an $875,000 penalty. The Pennsylvania Public Utility Commission voted 5-0 on September 10 to approve a settlement closing out a case that began after investigators identified the failed fusion.
According to the Pennsylvania Public Utility Commission, investigators identified a failed fusion at the Tropical Avenue Project in Pittsburgh. Inspections that followed uncovered failed socket fusions completed by a contractor employee from InfraSource, prompting regulators to conduct integrity validation digs at that location before expanding validation digs to four additional construction sites across Allegheny and Washington counties, per the commission’s account.
Those digs, according to PA Environment Digest, turned up far more than one bad joint. The PUC’s Bureau of Investigation and Enforcement alleged that Columbia Gas failed to identify no less than 220 visually unacceptable fusions and saddle tee fusions, failed to properly install at least 44 saddle tee taps to a gas main line, and failed to mark no less than 552 fusions according to the company’s own standards. Investigators also said the utility allowed an unqualified contractor employee to perform and inspect plastic fusions, and failed to capture and maintain accurate records of pipeline components and the personnel who did the work.
A Three-Year Path to Settlement
The formal case, Docket C-2023-3044398, took nearly three years to resolve. The PUC’s enforcement bureau filed its formal complaint against Columbia Gas and InfraSource on November 21, 2023, following an investigation the bureau launched in 2020 after the failed fusion at the Tropical Avenue project. A joint petition for approval of settlement followed on March 14, 2025, and the case wrapped up with the commission’s unanimous vote to adopt Administrative Law Judge Jeffrey A. Watson’s recommended decision approving the deal…