SABAL TRAIL TRANSMISSION, LLC (SPECTRA ENERGY PARTNERS, LP) — Gas transmission and gathering — incident on 2018-09-29

Gas transmission and gathering incident in O'BRIEN, SUWANNEE County, FL. Reported cause: NATURAL FORCE DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 26404 NATURAL GAS released, $1 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20180106.

Operator ID: 39167.

Reported incident date: 9/29/2018 14:00.

Location detail: 299.14

Cause detail: LIGHTNING

Cause detail: ORIGINAL REPORT: AT 2:00 PM ON SEPTEMBER 29, 2018, AN APPARENT LIGHTNING STRIKE AT OR NEAR THE ENBRIDGE SABAL TRAIL HILDRETH COMPRESSOR STATION IN O'BRIEN, FLORIDA CAUSED A FUSE ON A SAFETY DEVICE CIRCUIT INSIDE THE COMPRESSOR BUILDING TO BLOW. THIS CAUSED A 2-INCH FUEL GAS VALVE TO FAIL IN THE OPEN POSITION VENTING NATURAL GAS OUTSIDE THE COMPRESSOR BUILDING TO THE ATMOSPHERE. AT 9:48 AM ON SEPTEMBER 30, 2018 AN ENBRIDGE EMPLOYEE WAS ADVISED BY A NEARBY LANDOWNER ABOUT A NOISE COMING FROM THE COMPRESSOR STATION. ANOTHER ENBRIDGE EMPLOYEE WAS DISPATCHED TO THE COMPRESSOR STATION AND ISOLATED THE GAS RELEASE AT 10:20 AM ON SEPTEMBER 30, 2018. THE EVENT RESULTED IN A NATURAL GAS RELEASE OF 26.4 MILLION CUBIC FEET. SUPPLEMENTAL REPORT: 48 HR NRC REPORT 1226485 THE TIME LAG BETWEEN THE FIELD OPERATING PERSONNEL IDENTIFYING THE GAS RELEASE AT THE SABAL TRAIL HILDRETH COMPRESSOR STATION AND THE INITIAL REPORT TO THE NATIONAL RESPONSE CENTER (NRC) HAS IDENTIFIED THE NEED TO ADDITIONAL TRAINING AND AWARENESS OF THE REQUIREMENT TO IMMEDIATELY REPORT SUCH EVENTS TO INTERNAL PERSONNEL RESPONSIBLE FOR NRC NOTIFICATIONS. THE TRAINING WILL BE DEVELOPED AND IMPLEMENTED SYSTEM-WIDE IN 2019.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: NATURAL FORCE DAMAGE — LIGHTNING.

PHMSA indexed costs: $79,213 reported total cost, $73,969.13 in 1984 dollars, $90,823.446 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.