NIAGARA MOHAWK POWER CORP

gas_transmission Incident —

Incident Information

Report Date
OperatorNIAGARA MOHAWK POWER CORP
Commodity—
Pipeline Typegas_transmission

Location

State
Coordinates43.08261, -75.59797

Cause

CauseNATURAL FORCE DAMAGE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

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

Location Map

Incident Narrative

EXTREME RAINFALL IN THE MOHAWK VALLEY REGION OF UPSTATE NY CAUSED LOCALIZED FLOODING NEAR THE MOHAWK RIVER AND ASSOCIATED TRIBUTARIES. IN THE TOWNSHIP OF SHERRIL, THE SCONONDOA CREEK OVER-TOPPED IT'S BANKS NEAR THE STERLING POWER GENERATING PLANT. THE ASSOCIATED FLOODING AND STRONG CURRENTS ERODED THE COVER FROM PIPELINE 61, A 6"" 473 PSI MAOP PIPELINE SERVING ONLY STERLING POWER. FLOOD WATER INUNDATED THE POWER GENERATING PLANT AND PROMPTED A PRE-EMPTIVE SHUT DOWN OF PIPELINE 61. THE PIPELINE DEPRESSURIZED UNDER THE SUPERVISION OF LOCAL OPERATING PERSONNEL. SUBSEQUENT TO THE WEATHER EVENT, FLOODWATERS RECEDED AND REVEALED THAT PIPELINE 61 HAD BEEN COMPROMISED IN THE MAIN STREAM BED. NOTE: PART A, 15A: PIPELINE WAS SHUT DOWN AS A PRECAUTION ON 06/28/13 DUE TO FLOODING CONDITIONS. PART C, 3G: DATE OF MANUFACTURER IS BASED ON PURCHASE ORDER DATE OF 10/02/90.

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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