City Manager News ReleaseCity of San Carlos
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City Hall
600 Elm Street
Phone: (650) 802-4228
Fax: (650) 595-6729


PRESS RELEASE #113020152
Subject :

PG&E To Commence Safety Work on Natural Gas Line 147
Contact :Jeff Maltbie, City Manager    (650) 802-4228
November 30, 2015 – San Carlos, CA – Pacific Gas and Electric Company (PG&E) will be performing an internal inspection of Natural Gas Line 147 during the month of December along the entire length of the line; from Commercial Street to Edgewood Road in San Carlos. The inspection is intended to determine the integrity of the line and if it is safe to operate.

Work is scheduled to commence on December 1st and continue for three weeks, weather permitting. The inspection involves sending an advanced inspection device, known as a "Smart Pig" through the pipeline. The Smart Pig is equipped with sensors to allow engineers to analyze the interior of the pipeline and its associated components. The work was postponed when test runs damaged the pipe, requiring repair and approval from the California Public Utilities Commission (CPUC) for the testing to continue.

Commercial Street at Old County Road will be closed for the duration of the work. PG&E trucks and crews will be parked at various locations along Brittan Avenue to monitor the progress. If any section of the pipe is found to have imperfections, crews may need to excavate and repair them. No interruptions to gas service are anticipated, but if they occur, PG&E will contact customers right away.

The operating pressure of Line 147 is currently less than 125 pounds per square inch gauge (psig). During the work, it will be raised to a maximum of 330 psig to enable the Smart Pig to perform its analysis. Once the testing phase is complete, the line will be returned to the reduced pressure of 125 psig while the data is analyzed and results reviewed by PG&E and the CPUC. The CPUC will then consider the future operating pressure of the line, which is anticipated to occur in the summer of 2016. 

Mayor Ron Collins stated, β€œThe City of San Carlos supports the testing of Line 147 to determine if it is safe to operate. It has been over two years since the City received the first indication that the line may not be safe and it has taken a long time to reach this point. We look forward to reviewing the results of the inspection so we can truly know what is under our feet.”