CONOCO INC — Hazardous liquid — incident on 1988-01-21

Hazardous liquid incident in GLACIER County, MT. Reported cause: FAILED PIPE. Reported consequences: 0 fatalities, 0 injuries, 494 CRUDE OIL released, $5,000 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: 19880045.

Operator ID: 13131.

Reported incident date: 19880121.

Location detail: T33N, R5W, SEC. 18, 100 YARDS SOUTHEAST OF PIPELINE AERIAL MARKER 366. SKETCH ATTACHED.

Cause detail: CONOCO PIPE LINE COMPANY'S OIL MOVEMENTS GROUP IN HOUSTON, TX, SUSPECTED A LEAKHAD OCCURRED WHEN THE CUT BANK, MT, STATION PUMPS SHUT DOWN DUE TO LOW SUCTION PRESSURE AT 11:26 A.M., FRIDAY, JANUARY 21, 1988. THE LINE WAS IMMEDIATELY SHUTDOWN AND ALLOWED TO DRAIN INTO THE ROUNDUP,MT, STATION. WHEN THE LINE WAS SHUT DOWN, THE CUT BANK STATION DISCHARGE PRESSURE DROPPED TO ZERO AND THE CONRAD,MT, STATION SUCTION PRESSURE DROPPED TO 161 PSIG, INDICATING THE LEAK WAS IN THE PROXIMITY OF CUT BANK.OIL MOVEMENTS IMMEDIATELY NOTIFIED COMPANY FIELD PESONNEL OF THE SUSPECTED LEAK. THE CUT BANK STATION WAS ISOLATED AND CONTRACT PERRSONNEL WERE DISPATCHED BY HELICOPTER TO LOCATED TH LEAK. THE LEAK WAS SPOTTED AT 12:20 P.M. THE LANDOWNER WAS NOTIFIED OF THE LEAK AND APPROVAL WAS OBTAINED FOR SUBSEQUENT LINE REPAIRSAND CLEANUP. APPROXIMATELY 494BBLS. OF SUNDRE LIGHT CANADIAN CRUDE WERE SPILLED AND CONTAINED WITHIN A 200-YARD SECTION OF A HARVESTED WHEAT FIELD. APPROXIMATELY 30 BBLS. OF THE SPILLED OIL WERE RECOVERED.A 48-FOOT SECTION OF PIPE CONTAINING THE 23-INCH SEAM SPLIT WAS REMOVED AND REPLACED WITH A PRETESTED SECTION OF .250 WALL SEAMLESS Z-52 LINE PIPE. AFTER OBTAINING APPROVAL FROM THE LANDOWNER, THE LOCAL POLICE DEPARTMENT AND THE STATE OF MONTANA, THE OIL-SOAKED AREA WAS BURNED OFF. THE LINE WAS RETURNED TO SERVICE AT10:22PM ON JANUARY 21, 1988.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: MATERIAL/WELD/EQUIP FAILURE — UNSPECIFIED PIPE BODY OR SEAM.

PHMSA indexed costs: $5,000 reported total cost, $4,483.316 in 1984 dollars, $11,041.028 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.