Columbia Gas Pays $875K Penalty For Pipeline Fusion Failures

Columbia Gas, a subsidiary of NiSource, has agreed to pay an $875,000 civil penalty to settle allegations of widespread safety violations in its natural gas distribution network. The Pennsylvania Public Utility Commission (PUC) voted unanimously to adopt the settlement, resolving a formal complaint filed in November 2023. The penalty addresses defects in socket fusion joints identified across projects in Allegheny and Washington counties between 2019 and 2020.

The settlement includes strict financial restrictions that protect consumers from bearing the cost of the company's compliance failures. The $875,000 penalty is not tax-deductible for Columbia Gas and cannot be passed through to customers in Pennsylvania as an additional charge. Furthermore, the company is prohibited from recovering costs associated with the investigation and remediation of the specific plastic fusion projects cited in the complaint, ensuring the financial burden remains with the operator.

Defective Joints Triggered State Investigation

The PUC’s Bureau of Investigation and Enforcement launched its probe in 2020 after a fusion failure at the Tropical Avenue project in Pittsburgh. Subsequent integrity validation digs at that site and four other locations revealed extensive non-compliance. Investigators documented at least 220 visually unacceptable fusions on main and service lines, many of which lacked the required cold ring clamp impression or were improperly mitered.

Beyond the physical defects, the investigation uncovered significant procedural failures. Columbia Gas and its contractor, Infrasource, failed to mark or label at least 552 fusions according to company standards. Additionally, 44 saddle tee taps were installed improperly on gas main lines. The agency also found that unqualified contractor personnel performed and inspected plastic fusions, and that accurate records of pipeline components and personnel were not maintained.

Corrective Actions Mandate Process Overhaul

In 2021, Columbia Gas completed the replacement of all visually unacceptable fusions at the five identified locations. As part of the settlement, the company discontinued the use of socket fusion as a joining method for new work. This operational change aims to eliminate the specific risk associated with the defective joints found during the 2019 and 2020 projects.

Enhanced Oversight And Reporting Protocols

The settlement requires Columbia Gas to amend its procedures to mandate the submission of a Facility Failure Report for any legacy production joints removed after a visual inspection failure. The company must also incorporate the findings and locations of removed defective fusions into its annual Distribution Integrity Management Program review. This ensures that historical defects inform future risk assessments and system integrity planning.

New documentation processes will be implemented for fusion inspections, requiring construction coordinators to evaluate witnessed fusions in the field with standardized records. Additionally, Columbia Gas must notify the PUC’s Pipeline Safety Division of any leak occurring at a plastic fusion within one business day of discovery. These measures are designed to enhance contractor oversight and ensure rapid response to potential safety incidents.