Vehicle Safety
Recalls Search 320,000+ NHTSA safety recalls Complaints 2.1M+ consumer safety complaints TSBs 4.7M technical service bulletins VIN Lookup Decode any vehicle VIN instantly OBD Codes 12,000+ diagnostic trouble codes Fuel Economy EPA MPG data for all vehicles Statistics Recall trends & safety analysis
Consumer Safety
Product Safety 9,700+ CPSC product recalls Food Safety 28,600+ FDA food recalls Pet Safety 1.3M FDA animal adverse events Drug Safety 17,500+ FDA drug recalls Device Safety 38,400+ FDA device recalls Workplace Safety 102,900+ OSHA injury reports
Infrastructure
Bridge Safety 624,000 bridge inspections Aviation Safety 30,000+ NTSB aviation events Dam Safety 92,600 dam safety records Water Safety 433,000+ public water systems Railroad Safety 438,000+ rail crossings Pipeline Safety 8,800+ pipeline incidents
Public Health
Nursing Homes 14,700 CMS rated facilities Environmental 80,000+ hazardous sites & releases

NORTHERN NATURAL GAS CO

gas_transmission Incident —

Incident Information

Report Date—
OperatorNORTHERN NATURAL GAS CO
Commodity—
Pipeline Typegas_transmission

Location

State
Coordinates39.05633, -97.85658

Cause

CauseEQUIPMENT FAILURE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

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

Location Map

Incident Narrative

ON JANUARY 11, 2017, AT 1945 HOURS, THE OPERATIONS COMMUNICATION CENTER RECEIVED A CALL FROM A TENANT NEAR THE TESCOTT COMPRESSOR STATION STATING THERE WAS A LOUD NOISE NEAR THE STATION. A NORTHERN NATURAL GAS TECHNICIAN ARRIVED AT THE STATION AT APPROXIMATELY 2030 HOURS AND DID NOT NOTICE ANY ABNORMAL CONDITIONS. UNIT 5 WAS ON LINE ON THE E MAINLINE WITH A MAOP OF 991 PSIG. HE FOUND THE RELIEF VALVE RAIN CAP WAS OFF. WHEN THE TECHNICIAN CHECKED THE PRESSURE TRENDS, HE FOUND THAT THE DISCHARGE RELIEF VALVE APPEARED TO HAVE OPENED AND CLOSED SEVERAL TIMES AT PRESSURES BELOW THE MAOP RANGING FROM 862 PSIG TO 921 PSIG. THE RELIEF VALVE IS INTENDED TO RELIEVE PRESSURE AT 1030 PSIG. GAS CONTROL DID NOT NEED THE UNIT AND IT WAS SHUT DOWN. ON JANUARY 12, 2017, TECHNICIANS BENCH TESTED THE RELIEF VALVE PILOT. A NEW SOFT GOODS KIT WAS INSTALLED IN THE PILOT AND THE PRESSURE WAS SET AT 1,030-PSIG. THE PILOT WAS INSTALLED ON THE RELIEF VALVE AND THE RELIEF VALVE LIFTED OFF THE SEAT AT 1030-PSIG WHEN TESTED. UNIT 5 WAS PLACED ON LINE AT 1127 HOURS. ON JANUARY 13, 2017, THE FACILITY PLANNING DEPARTMENT WAS CONTACTED TO CALCULATE THE GAS LOSS. FIELD OPERATIONS INDICATED THAT IT DID NOT SEEM THAT THE RELIEF VALVE WAS FULL OPEN DURING VENTING. THE RELIEF INCIDENT OCCURRED BETWEEN 19:10 AND 20:06. FLOW THROUGH THE LINE WAS CONSTANT DURING THE PERIOD AS MEASURED BY THE FLOW METER AT THE CLIFTON COMPRESSOR STATION 47.5 MILES DOWNSTREAM. THE INITIAL ESTIMATE INDICATED A GAS LOSS OF 6 MMCF. FACILITY PLANNING NOTIFIED FIELD OPERATIONS AND AN URGENT OPERATIONS COMMUNICATION CENTER CALL WAS INITIATED WITH THE PIPELINE SAFETY AND ENVIRONMENTAL DEPARTMENTS. THE NATIONAL RESPONSE CENTER WAS NOTIFIED IMMEDIATELY AFTER THE URGENT OPERATIONS COMMUNICATION CENTER CALL OF THE INCIDENT DUE TO THE GAS LOSS IN EXCESS OF 3 MMCF. ON JANUARY 17, 2017, A THOROUGH GAS LOSS ANALYSIS WAS COMPLETED BY FACILITY PLANNING. LIMITED WORK OCCURRED ON JANUARY 16, 2017, DUE TO THE ICE STORM. THE ESTIMATED GAS LOSS FROM THE INCIDENT IS 4.9 MMCF.

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.

Browse All Incidents Pipeline Safety Stats Pipeline Safety Home
Back to All Incidents More Incidents in