Columbia Gas Transmission, LLC Requests Prior Notice Authorization for MAOP Increase

Strategic Insights -

Columbia Gas Transmission, LLC ("Columbia") has submitted a prior notice request to the Federal Energy Regulatory Commission (FERC) to increase the Maximum Allowable Operating Pressure (MAOP) of its Line 1655 pipeline, located in York and Adams Counties, Pennsylvania. The proposed increase in MAOP from 500 pounds per square inch gauge (psig) to 936 psig will enable Columbia to meet customer demand and provide safe, reliable, and efficient service to its existing customers. The request includes the installation of new facilities, including a gas-fired water bath heater, an inline filter, and auxiliary facilities, to accommodate the pressure increase at interconnects on its existing facilities.

Key Takeaways:

  • Columbia Gas Transmission, LLC has submitted a prior notice request to the Federal Energy Regulatory Commission (FERC) to increase the Maximum Allowable Operating Pressure (MAOP) of its Line 1655 pipeline.
  • The proposed increase in MAOP from 500 psig to 936 psig will enhance the pipeline's design capacity from 36,765 dekatherms per day (Dth/d) to 66,765 Dth/d.
  • The increase in MAOP will not have any adverse impact on Columbia's existing customers and will enable the company to meet customer demand and provide safe, reliable, and efficient service.
  • The request includes the installation of new facilities, including a gas-fired water bath heater, an inline filter, and auxiliary facilities, to accommodate the pressure increase at interconnects on its existing facilities.
  • Columbia has submitted the necessary information and attachments, including a public information transmittal letter, application text, form of notice, and location of facilities, as required by FERC regulations.
  • The proposed MAOP increase is consistent with, and required by, the public convenience and necessity.
  • Columbia requests that the Commission find that the proposed increase is in public interest and grant the authorization requested.

Statistics:

  • The proposed MAOP increase will increase the design capacity of Line 1655 from 36,765 Dth/d to 66,765 Dth/d.
  • The increase in pressure will correspondingly raise the pipeline's MAOP from 500 psig to 936 psig.
  • The proposal will not have any adverse impact on Columbia's existing customers.
  • Columbia completed the replacement work under CP15-11-000 in 2015.

Sources:

  • Federal Energy Regulatory Commission: Columbia Gas Transmission, LLC; Docket No. CP25-__-000 (Request for Prior Notice Authorization) (2025).
  • Federal Energy Regulatory Commission: Columbia Gas Transmission, LLC; Docket No. CP83-76-000 (Blanket Certificate) (1983).
  • U.S. Code: 15 U.S.C. § 717a(6) (Natural Gas Act).