{"operation":"document","citation":"PHMSA FIR, Enbridge Energy LP, 2009-06-09","title":"Failure Report- Enbridge Energy LP 6/9/09","source_type":"incident","agency":"Pipeline and Hazardous Materials Safety Administration","status":"historical","official":true,"published_on":"2010-10-17","effective_on":"2009-06-09","summary":"Enbridge Energy LP; Hazardous Liquid; MN; failure 2009-06-09; apparent cause: Material Failure.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-fir-failure-report-enbridge-energy-lp-6909.json","markdown":"https://regulus.evalyn.ai/document/phmsa-fir-failure-report-enbridge-energy-lp-6909.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-fir-failure-report-enbridge-energy-lp-6909","source_url":"https://www.phmsa.dot.gov/safety-reports/failure-report-enbridge-energy-lp-6909","body":"<<<PAGE 1>>>\n\nMemorandum\nU.S. Department\nof Transportation\nPipeline and\nHazardous Materials\nSafety Administration Central Region Office Office of Pipeline Safety\nDate: September 30, 2010\nSubject: Summary Incident Report\nEnbridge Energy Partners L.P. (Op ID 11169)\nFloodwood, MN to Superior, WI (Unit 3083)\nLine 2 Crude Oil Leak\nJune 9, 2009\nSMART Activity ID 125641\nFrom: James Bunn, Staff Engineer\nDavid Barrett, Director – Central Region, PHP-300\nTo: 1.0 SUMMARY\nAt approximately 5:00 p.m. on June 9, 2009, Enbridge Energy Partners L.P. (“Enbridge”)\ndiscovered a crude oil leak on their Line 2 Pipeline in St. Louis County, Gowan, MN (the\n“Incident”). An estimated 5 barrels (bbls) of crude oil was released from the pipeline. The\nIncident occurred on the pipeline right of way (ROW) near milepost number 1056 (MP 1056),\nsoutheast of the City of Gowan, MN. No fatalities or injuries occurred as a result of the Incident.\nThe Incident did not occur in a high consequence area (HCA) and no water was impacted. The\ntotal cost of the Incident, pipeline repair and environmental cleanup, is estimated at $44,000.\nThere were no service interruptions or supply impacts as a result of the Incident.\n2.0 PIPELINE SYSTEM\nEnbridge’s Line 2 is a 26-inch diameter crude oil pipeline that runs from Gretna, Manitoba,\nCanada to Superior, WI. At the Incident location, the pipeline is constructed of API 5L X-52\nline pipe manufactured by A.O. Smith in 1954. The pipeline is 26-inch diameter by 0.281-inch\nwall thickness, electric flash welded (EFW) type pipe, coated with a coal tar enamel type system.\nPage | 1\n\n<<<PAGE 2>>>\n\nThe Line 2 maximum operating pressure (MOP) is 651 psig.\n3.0 DISCUSSION\nOn June 5, 2009, an Enbridge employee investigating 3rd party activity near MP 1056 discovered\na small pool of crude oil on the ROW. Initially, Enbridge attributed the crude oil source to a 3rd\nparty. Enbridge obtained samples of the crude and sent them to a laboratory to identify the\nsource. At 5:35 p.m. on June 9, Enbridge Notified the Minnesota Office of Pipeline Safety\n(MNOPS) Duty Officer that a leak had occurred. Ron Wiest, MNOPS Senior inspector,\nconducted an on-site investigation of the Incident.\nEnbridge proceeded to excavate the area around the pipeline. Once the line was exposed a 30-\ninch long Plidco split sleeve was discovered at the Incident location. The Plidco sleeve was\ninstalled in 1989 to repair a dent in the pipeline. In 1989 Enbridge standard practice for\ninstalling Plidco split sleeves on a pipeline called for the replacement of mechanical fasteners\n(bolts) with bar stock so the two halves of the sleeve could be welded into place. The bar stock\nwas inserted in the flange holes and then welded to the sleeve to secure the sleeve to the pipe\nline.\nOn June 9, 2009, crude oil was discovered leaking through a ½” long crack in a horizontal seal\nweld between the Plidco flange body and one of the bar stock filled bolt holes.\nThe Plidco sleeve flanges contained 28 (14 each at 3:00 O’clock and 9:00 O’clock) seal welds.\nAll seal welds were tested in the field for the presence of cracks with magnetic particle\ninspection (MT).\n4.0 EMERGENCY RESPONSE\nEnbridge employees were dispatched to the Incident site. Once the repair was completed and\ninspected the contaminated soil was remediated.\n5.0 RETURN TO SERVICE\nAfter the field investigation was complete, a 2-inch, 3000# socket weld end cap was installed\nover the leaking seal weld to encapsulate the crack. A second socket weld end cap was installed\nover a second non-leaking seal weld where MT inspection identified a crack.\nAt the time of the Incident, Line 2 operating pressure was approximately 239 psig. No reduction\nin operating pressure was required as a result of this incident.\nPage | 2\n\n<<<PAGE 3>>>\n\n6.0 FINDINGS\nThe Enbridge Line 2 MP 1056 Incident was caused by a crack that initiated on the external\nsurface of a Plidco repair sleeve. The crack was located between the Plidco flange body and one\nof the bar stock filled bolt holes. The crack was apparently caused by a defective weld.\nEXHIBITS\nInformation regarding the Incident was reported by Enbridge to the National Response Center\n(NRC) on June 9, 2009 in NRC Report No. 908091 (Exhibit A), and to the Pipeline and\nHazardous Materials Safety Administration (PHMSA) in Accident Report No. 20090191 dated,\nJuly 8, 2009 (Exhibit B).\nExhibit A Exhibit B NRC Report No. 908091\nAccident Report No. 20090191\nPage | 3\n\n<<<PAGE 4>>>\n\nEXHIBIT A\nNRC REPORT No. 908091\n\n<<<PAGE 5>>>\n\nPage 1 of 2\nNATIONAL RESPONSE CENTER 1-800-424-8802\n*** For Public Use ***\nInformation released to a third party shall comply with any\napplicable federal and/or state Freedom of Information and Privacy Laws\nIncident Report # 908091\nINCIDENT DESCRIPTION\n*Report taken at 17:30 on 09-JUN-09\nIncident Type: PIPELINE\nIncident Cause: EQUIPMENT FAILURE\nAffected Area:\nThe incident was discovered on 09-JUN-09 at 15:05 local time.\nAffected Medium: SOIL SOIL\n____________________________________________________________________________\nSUSPECTED RESPONSIBLE PARTY\nOrganization: ENBRIDGE ENERGY PARTNERS\nSUPERIOR, WI 54880\nType of Organization: PRIVATE ENTERPRISE\n____________________________________________________________________________\nINCIDENT LOCATION\nSEE LEGAL DESCRIPTION County: ST. LOUIS\nState: MN\nSection: SE NE 17 Township: 50 N Range: 19 W RURAL AREA\n____________________________________________________________________________\nRELEASED MATERIAL(S)\nCHRIS Code: OIL Official Material Name: OIL: CRUDE\nAlso Known As:\nQty Released: 5 BARREL(S)\n____________________________________________________________________________\nDESCRIPTION OF INCIDENT\nCALLER IS REPORTING A DISCHARGE OF CRUDE OIL FROM A 26 INCH STEEL PIPELINE DUE TO A\nFITTING THAT WAS LEAKING. CALLER WAS NOTIFIED OF DISCHARGE AT 1505 CDT.\n____________________________________________________________________________\nINCIDENT DETAILS\nPipeline Type: TRANSMISSION\nDOT Regulated: YES\nPipeline Above/Below Ground: BELOW\nExposed or Under Water: NO\nPipeline Covered: UNKNOWN\n____________________________________________________________________________\nDAMAGES\nFire Involved: NO Fire Extinguished: UNKNOWN\nINJURIES: NO Hospitalized: Empl/Crew: Passenger:\nFATALITIES: NO Empl/Crew: Passenger: Occupant:\nEVACUATIONS: NO Who Evacuated: Radius/Area:\nDamages: NO\nClosure Type\nAir: N\nLength of Direction of\nDescription of Closure Closure Closure\nRoad: N\nWaterway: N\nTrack: N\nPassengers Transferred: NO\nMajor\nArtery:\nN\nhttp://www.nrc.uscg.mil/reports/rwservlet?standard\nweb+inc\n_\n_\nseq=908091\n10/7/2010\n\n<<<PAGE 6>>>\n\nPage 2 of 2\nEnvironmental Impact: UNKNOWN\nMedia Interest: NONE Community Impact due to Material:\n____________________________________________________________________________\nREMEDIAL ACTIONS\nCALLER STATES THE LINE WAS SHUTDOWN, REPAIRS WILL BE MADE AND THE CONTAMINATED SOIL\nWILL BE REMOVED.\nRelease Secured: YES\nRelease Rate:\nEstimated Release Duration:\n____________________________________________________________________________\nWEATHER\nWeather: OVERCAST, 55ºF\n____________________________________________________________________________\nADDITIONAL AGENCIES NOTIFIED\nFederal: NONE\nState/Local: NONE\nState/Local On Scene: NONE\nState Agency Number: NONE\n____________________________________________________________________________\nNOTIFICATIONS BY NRC\nATLANTIC STRIKE TEAM (MAIN OFFICE)\n09-JUN-09 17:36\nUSCG ICC (ICC ONI)\n09-JUN-09 17:36\nDOT CRISIS MANAGEMENT CENTER (MAIN OFFICE)\n09-JUN-09 17:36\nU.S. EPA V (MAIN OFFICE)\n09-JUN-09 17:37\nFLD INTEL SUPPORT TEAM DETROIT (COMMAND CENTER)\n09-JUN-09 17:36\nMN BUREAU OF CRIMINAL APPREHENSION (OPERATIONS CENTER)\n09-JUN-09 17:36\nMN DEPT OF HEALTH (MAIN OFFICE)\n09-JUN-09 17:36\nMN U.S. ATTORNEY'S OFFICE (MAIN OFFICE)\n09-JUN-09 17:36\nNTL ENVMTL EMERG CENTRE CANADA (MAIN OFFICE)\n09-JUN-09 17:36\nNATIONAL INFRASTRUCTURE COORD CTR (MAIN OFFICE)\n09-JUN-09 17:36\nNOAA RPTS FOR MN (MAIN OFFICE)\n09-JUN-09 17:36\nPIPELINE & HAZMAT SAFETY ADMIN (OFFICE OF PIPELINE SAFETY (AUTO))\n09-JUN-09 17:36\nWI DEPT NAT RES BUREAU OF LAW ENF (MAIN OFFICE)\n09-JUN-09 17:36\nUSCG DISTRICT 9 (COMMAND CENTER)\n09-JUN-09 17:36\n____________________________________________________________________________\nADDITIONAL INFORMATION\nCALLER WILL NOTIFY STATE AGENCIES.\n___________________________________________________________________________\n*** END INCIDENT REPORT # 908091 ***\nhttp://www.nrc.uscg.mil/reports/rwservlet?standard\nweb+inc\n_\n_\nseq=908091\n10/7/2010\n\n<<<PAGE 7>>>\n\nEXHIBIT B\nACCIDENT REPORT\nNo. 20090191\n\n<<<PAGE 8>>>\n\nNOTICE: This report is required by 49 CFR Part 195. Failure to report can result in a civil penalty not to exceed $25,000 for each violation for each day that such violation persists except that the maximum civil penalty shall not exceed $500,000 as provided in 49 USC 60122 Form Approved\nOMB No. 2137-0047\nU.S. Department of Transportation\nResearch and Special Programs\nAdministration\nACCIDENT REPORT – HAZARDOUS LIQUID\nPIPELINE SYSTEMS\nReport Date\nNo.\n(DOT Use Only)\nINSTRUCTIONS\nImportant: Please read the separate instructions for completing this form before you begin. They clarify the\ninformation requested and provide specific examples. If you do not have a copy of the instructions,\nyou can obtain one from the Office Of Pipeline Safety Web Page at http://ops.dot.gov.\nPART A – GENERAL REPORT INFORMATION\nOriginal Report Supplemental Report Final Report\n1. a. Operator's OPS 5-digit Identification Number (if known) / ____________/\n2. b. If Operator does not own the pipeline, enter Owner’s OPS 5-digit Identification Number (if known) / ___ /\nc. Name of Operator ______________________________________________________________________________________\nd. Operator street address _______________________________________________________________________________\ne. Operator address ______________________________________________________________________________________\nCity, County, State and Zip Code\nIMPORTANT: IF THE SPILL IS SMALL, THAT IS, THE AMOUNT IS AT LEAST 5 GALLONS BUT IS LESS THAN 5 BARRELS,\nCOMPLETE THIS PAGE ONLY, UNLESS THE SPILL IS TO WATER AS DESCRIBED IN 49 CFR §195.52(A)(4) OR IS OTHERWISE\nREPORTABLE UNDER §195.50 AS REVISED IN CY 2001.\n2. Time and date of the accident\n/ / / / / / / /\nhr. month day year\n3. Location of accident\n(If offshore, do not complete a through d. See Part C.1)\na. Latitude: _____ Longitude:\n__________\n(if not available, see instructions for how to provide specific location)\nb. _________________________________________________\nCity, and County or Parish\nc. _________________________________________________\nState and Zip Code\nd. M ile post/valve station or survey station no.\n(whichever gives more accurate location)\n_________________________________\n4. Telephone report\n/ / / / / / / /\nNRC Report Number month day year\n5. Losses (Estimated)\nPublic/Community Losses reimbursed by operator:\nPublic/private property damage $_______________\nCost of emergency response phase $_______________\nCost of environmental remediation $_______________\nOther Costs $_______________\n(describe) _____________________________________\nOperator Losses:\nValue of product lost $_______________\nValue of operator property damage $_______________\nOther Costs $_______________\n(describe) _____________________________________\nTotal Costs $_______________\n6. Commodity Spilled Yes No\n(If Yes, complete Parts a through c where applicable)\na. Name of commodity spilled ___________________________\nb. Classification of commodity spilled:\nHVLs /other flammable or toxic fluid which is a gas at ambient conditions\nCO2 or other non-flammable, non-toxic fluid which is a gas at ambient conditions\nGasoline, diesel, fuel oil or other petroleum product which is a liquid at ambient conditions\nCrude oil\nc. Estimated amount of commodity\ninvolved :\nBarrels\nGallons (check only if spill is\nless than one barrel)\nAmounts:\nSpilled : ____________\nRecovered: ____________\nCAUSES FOR SMALL SPILLS ONLY (5 gallons to under 5 barrels) : (For large spills [5 barrels or greater] see Part H)\nCorrosion Natural Forces Excavation Damage Other Outside Force Damage\nMaterial and/or Weld Failures Equipment Incorrect Operation Other\nPART B – PREPARER AND AUTHORIZED SIGNATURE\n(type or print) Preparer's Name and Title Preparer's E-mail Address Area Code and Telephone Number\nArea Code and Facsimile Number\nAuthorized Signature (type or print) Name and Title Date Area Code and Telephone Number\nForm RSPA F 7000-1 ( 01-2001 ) Page 1 of 4\nOPS Data Facsimile\n\n<<<PAGE 9>>>\n\nPART C – ORIGIN OF THE ACCIDENT (Check all that apply)\n1. Additional location information\na. Line segment name or ID _______________________\nb. Accident on Federal land other than Outer Continental\nShelf Yes No\nc. Is pipeline interstate? Yes No\nOffshore: Yes No (complete d if offshore)\nd. Area ___________________ Block # ______________\nState / / or Outer Continental Shelf\n2. Location of system involved (check all that apply)\nOperator’s Property\nPipeline Right of Way\nHigh Consequence Area (HCA)?\nDescribe HCA____________________________________\n3. Part of system involved in accident\nAbove Ground Storage Tank\nCavern or other below ground storage facility\nPump/meter station; terminal/tank farm piping and\nequipment, including sumps\nOther Specify: _________________________________\nOnshore pipeline, including valve sites\nOffshore pipeline, including platforms\nIf failure occurred on Pipeline, complete items a - g:\n4. Failure occurred on\nBody of Pipe Pipe Seam Scraper Trap\nPump Sump Joint\nComponent Valve Metering Facility\nRepair Sleeve Welded Fitting Bolted Fitting\nGirth Weld\nOther (specify)\nYear the component that failed was installed: / /\n5. Maximum operating pressure (MOP)\na. Estimated pressure at point and time of accident:\n____ PSIG\nb. MOP at time of accident:\n___________PSIG\nc. Did an overpressurization occur relating to the accident?\nYes No\na. Type of leak or rupture\nLeak: Pinhole Connection Failure (complete sec. H5)\nPuncture, diameter (inches) _________\nRupture: Circumferential – Separation\nLongitudinal – Tear/Crack, length (inches) __________\nPropagation Length, total, both sides (feet) _________\nN/A\nOther _______________________________\nb.Type of block valve used for isolation of immediate section:\nUpstream: Manual Automatic Remote Control\nCheck Valve\nDownstream: Manual Automatic Remote Control\nCheck Valve\nc. Length of segment isolated _______ ft\nd. Distance between valves _______ ft\ne. Is segment configured for internal inspection tools? Yes No\nf. Had there been an in-line inspection device run at the point of\nfa ilure? Yes No Don’t Know\nNot Possible due to physical constraints in the system\ng. If Yes, type of device run (check all that apply)\nHigh Resolution Magnetic Flux tool Year run: ______\nLow Resolution Magnetic Flux tool Year run: ______\nUT tool Year run: ______\nGeometry tool Year run: ______\nCaliper tool Year run: ______\nCrack tool Year run: ______\nHard Spot tool Year run: ______\nOther tool Year run: ______\nPART D – MATERIAL SPECIFICATION PART E – ENVIRONMENT\n1. Nominal pipe size (NPS) / / in.\n2. Wall thickness / / in.\n3. Specification SMYS / /\n4. Seam type\n5. Valve type\n6. Manufactured by in year / /\n1. Area of accident In open ditch\nUnder pavement Above ground\nUnderground Under water\nInside/under building Other ____________\n2. Depth of cover: inches\nPART F – CONSEQUENCES\n1. Consequences (check and complete all that apply)\na. Fatalities Injuries c. Product ignited Yes No d. Explosion Yes No\nNumber of operator employees: _______ _______ e. Evacuation (general public only) / / people\nContractor employees working for operator: _______ _______ Reason for Evacuation:\nGeneral public: _______ _______ Precautionary by company\nTotals: _______ _______ Evacuation required or initiated by public official\nb. Was pipeline/segment shutdown due to leak? Yes No f. Elapsed time until area was made safe:\nIf Yes, how long? ______ days ______ hours _____ minutes / / hr. / / min.\n2. Environmental Impact\na. Wildlife Impact: Fish/aquatic Yes No e. Water Contamination: Yes No (If Yes, provide the following)\nBir ds Yes No Amount in water _________ barrels\nTerrestrial Yes No Ocean/Seawater No Yes\nb. Soil Contamination Yes No Surface No Yes\nIf Yes, estimated number of cubic yards: _________\nGroundw ater No Yes\nc. Long term impact assessment performed: Yes No Drinking water No Yes (If Yes, check below.)\nd. Anticipated remediation Yes No Private well Public water intake\nIf Yes, check all that apply: Surface water Groundwater Soil Vegetation Wildlife\nForm RSPA F 7000-1 ( 01-2001 ) OPS Data Facsimile\nPage 2 of 4\n\n<<<PAGE 10>>>\n\nPART G – LEAK DETECTION INFORMATION\n1. Computer based leak detection capability in place? 2. Was the release initially detected by? (check one): Yes No\nCPM/SCADA-based system with leak detection\nStatic shut-in test or other pressure or leak test\nLocal operating personnel, procedures or equipment\nRemote operating personnel, including controllers\nAir patrol or ground surveillance\nA third party Other (specify) _________________\n3. Estimated leak duration days ____ hours ____\nPART H – APPARENT CAUSE\nImportant: There are 25 numbered causes in this Part H. Check the box corresponding to the\nprimary cause of the accident. Check one circle in each of the supplemental categories\ncorresponding to the cause you indicate. See the instructions for guidance.\nH1 – CORROSION\n1. External Corrosion\n2. Internal Corrosion\n(Complete items a – e\nwhere applicable.) b. Visual Examination\nLocalized Pitting\nGeneral Corrosion\nOther ____________________\na. Pipe Coating\nc. Cause of Corrosion\nBare\nGalvanic Atmospheric\nCoated\nStray Current Microbiological\nCathodic Protection Disrupted\nStress Corrosion Cracking\nSelective Seam Corrosion\nOther ____________________\nd. Was corroded part of pipeline considered to be under cathodic protection prior to discovering accident?\nNo Yes, Year Protection Started: / /\ne. Was pipe previously damaged in the area of corrosion?\nNo Yes => Estimated time prior to accident: / / years / / months Unknown\nH2 – NATURAL FORCES\n3. Earth Movement => Earthquake Subsidence Landslide Other\n4. Lightning\n5. Heavy Rains/Floods => Washouts Flotation Mudslide Scouring Other\n6. Temperature => Thermal stress Frost heave Frozen components Other\n7. High Winds\nH3 – EXCAVATION DAMAGE\n8. Operator Excavation Damage (including their contractors/Not Third Party)\n9. Third Party (complete a-f)\na. Excavator group\nGeneral Public Government Excavator other than Operator/subcontractor\nb. Type: Road Work Pipeline Water Electric Sewer Phone/Cable\nLandowner-not farming related Farming Railroad\nOther liquid or gas transmission pipeline operator or their contractor\nNautical Operations Other ________\nc. Excavation was: Open Trench Sub-strata (boring, directional drilling, etc…)\nd. Excavation was an ongoing activity (Month or longer) Yes No e. Did operator get prior notification of excavation activity?\nIf Yes, Date of last contact /_________/\nYes; Date received: / / mo. / / day / ______/ yr. No\nNotification received from: One Call System Excavator Contractor Landowner\nf. Was pipeline marked as result of location request for excavation? No i. Temporary markings: Flags Stakes Paint\nii. Permanent markings:\niii. Marks were (check one) : Accurate Not Accurate\niv. Were marks made within required time? Yes No\nH4 – OTHER OUTSIDE FORCE DAMAGE\n10. Fire/Explosion as primary cause of failure => Fire/Explosion cause: Man made Natural\n11. Car, truck or other vehicle not relating to excavation activity damaging pipe\n12. Rupture of Previously Damaged Pipe\n13. Vandalism\nYes (If Yes, check applicable items i - iv)\nForm RSPA F 7000-1 ( 01-2001 ) Page 3 of 4\nOPS Data Facsimile\n\n<<<PAGE 11>>>\n\nH5 – MATERIAL AND/OR WELD FAILURES\nMaterial\n14. Body of Pipe => Dent Gouge Bend Arc Burn Other\n15. Component => Valve Fitting Vessel Extruded Outlet Other\n16. Joint => Gasket O-Ring Threads Other\nWeld\n17. Butt => Pipe Fabrication Other\n18. Fillet => Branch Hot Tap Fitting Repair Sleeve Other\n19. Pipe Seam => LF ERW DSAW Seamless Flash Weld\nHF ERW SAW Spiral Other\nComplete a-g if you indicate any cause in part H5.\na. Type of failure:\nConstruction Defect => Poor Workmanship Procedure not followed Poor Construction Procedures\nMaterial Defect\nb. Was failure due to pipe damage sustained in transportation to the construction or fabrication site? Yes No\nc. Was part which leaked pressure tested before accident occurred? Yes, complete d-g No\nd. Date of test: / / yr. / / mo. / / day\ne. Test medium: Water Inert Gas Other\nf. Time held at test pressure: / / hr.\ng. Estimated test pressure at point of accident: PSIG\nH6 – EQUIPMENT\n20. Malfunction of Control/Relief Equipment => Control valve Instrumentation SCADA Communications\nBlock valve Relief valve Power failure Other\n21. Threads Stripped, Broken Pipe Coupling => Nipples Valve Threads Dresser Couplings Other\n22. Seal Failure => Gasket O-Ring Seal/Pump Packing Other\nH7 – INCORRECT OPERATION\n23. Incorrect Operation\na. Type: Inadequate Procedures Inadequate Safety Practices Failure to Follow Procedures\nOther _______________________________________\nb. Number of employees involved who failed a post-accident test: drug test: / / alcohol test /_________/\nH8 – OTHER\n24. Miscellaneous, describe:\n25. Unknown\nInvestigation Complete Still Under Investigation (submit a supplemental report when investigation is complete)\nPART I – NARRATIVE DESCRIPTION OF FACTORS CONTRIBUTING TO THE EVENT (Attach additional sheets as necessary)\nForm RSPA F 7000-1 (01-2001 ) Page 4 of 4\nOPS Data Facsimile","truncated":false,"body_characters":21512}