MONTANA - DAKOTA UTILITIES CO
gas_distribution Incident — RAPID CITY, SD
Incident Information
| Report Date | — |
| Operator | MONTANA - DAKOTA UTILITIES CO |
| Commodity | — |
| Pipeline Type | gas_distribution |
Location
| City | RAPID CITY |
| State | SD |
| County | PENNINGTON |
| Coordinates | 44.07770, -103.23747 |
Cause
| Cause | EXCAVATION DAMAGE |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
ON NOVEMBER 29, 2021 AT 9:22 A.M. MST, AN EXCAVATOR NOTIFIED MONTANA-DAKOTA UTILITIES CO. (MDU) THAT THEY DAMAGED A 1"" MAIN NEAR 920 11TH STREET, RAPID CITY, SOUTH DAKOTA. AN MDU FIRST RESPONDER ARRIVED AT 10:27 A.M. MST AND AFTER CHECKING IN WITH LOCAL FIRE DEPARTMENT PERSONNEL ON SCENE, BEGAN INVESTIGATING. WHILE THE MDU EMERGENCY RESPONDERS WERE WORKING TO SECURE THE DAMAGE, THE LEAKING NATURAL GAS CAUSED BY THE EXCAVATION DAMAGE MIGRATED AND SUBSEQUENTLY IGNITED CAUSING AN EXPLOSION AND A FIRE AT 920 11TH STREET. AN MDU CREW EXCAVATED AND SQUEEZED THE 2"" STEEL MAIN UPSTREAM OF THE DAMAGED 1"" MAIN. THE INVESTIGATION DETERMINED THE THIRD-PARTY EXCAVATOR LOCATE TICKET EXPIRED PRIOR TO COMMENCING WORK ON THE DATE OF THE INCIDENT.
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.