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NORTHERN STATES POWER CO OF MINNESOTA

gas_distribution Incident — MOORHEAD, MN

Incident Information

Report Date—
OperatorNORTHERN STATES POWER CO OF MINNESOTA
Commodity—
Pipeline Typegas_distribution

Location

CityMOORHEAD
StateMN
CountyCLAY
Coordinates46.85863, -96.76805

Cause

CauseOTHER OUTSIDE FORCE DAMAGE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

Property Damage—
Lost Commodity—
Public/Private Damage—
Emergency Response—
Environmental Remediation—
Other Costs—

Location Map

Incident Narrative

ON FEBRUARY 14, 2019, A SNOW PLOW HIT ABOVEGROUND PIPING FOR A PRESSURE RECORDING CHART AT A REGULATOR STATION THAT WAS INSTALLED IN A VAULT. THE IMPACT DAMAGED PIPING IN THE VAULT CAUSING THE REGULATOR TO FAIL WHICH RESULTED IN THE ACTIVATION OF THE RELIEF VALVE. THE MAOP OF THE SYSTEM IS 25 PSIG AND THE HIGHEST PRESSURE OBSERVED WAS 30.5 PSIG. AT APPROXIMATELY 12:00 ON FEBRUARY 15, 2019 THE SYSTEM WAS SHUT-IN BY CLOSING AN EMERGENCY VALVE, CAUSING AN OUTAGE TO 950 CUSTOMERS. REPAIRS WERE INITIALED AT APPROXIMATELY 16:00 ON FEBRUARY 15, 2019. REPAIRS WERE COMPLETED BY 19:30, THE SYSTEM WAS STARTED UP AND LEAK SURVEYED. CUSTOMER RELIGHTS STARTED AT APPROXIMATELY 23:00 AND CONTINUED UNTIL FEBRUARY 16, 2019 AT 16:00. ADDITIONAL LEAK SURVEYS WERE CONDUCTED FEBRUARY 16 STARTING AT 19:00. AFTER THE SECOND SURVEY NO FURTHER LEAKS WERE DISCOVERED. ON FEBRUARY 17, STARTING AT 11:00, ONE MORE SURVEY WAS CONDUCTED WITH NO FURTHER LEAKS DISCOVERED.

About This Pipeline Incident

Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.

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