The duration of the unplanned outage, combined with storage capability and optimization of Enbridge system flexibility minimized impact on crude oil production and deliveries. Enbridge appreciates the cooperation of shippers on the Enbridge system in realigning deliveries, which facilitated operations on Lines 1, 2 and 4 that returned to service starting the morning of November 29, 2007.
Repairs were conducted continuously over the weekend, overcoming the challenges of a major winter snowstorm in Minnesota on Saturday. A segment of pipeline approximately 180 feet long was replaced and the pipeline has been returned to pre-incident operating pressures following consultation with the Federal pipeline safety regulator, the U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration (PHMSA).
Clean up of the site also progressed over the weekend with all oil and the majority of impacted soils removed from the area. The volume of oil released was estimated to be 325 barrels, which was largely contained in the trench that had been excavated to facilitate the planned maintenance. Contaminated soil was excavated and transported to an approved facility. While environmental impacts are expected to be minimal, Enbridge will continue to work with the U.S. Environmental Protection Agency and the Minnesota Pollution Control Agency to complete the environmental cleanup of the site.
The cause of the accident remains under active investigation with complete results not expected for several weeks. The section of pipeline involved in the failure was removed and transported to a third party facility for examination and testing. Enbridge continues to work closely with federal and state agencies in the investigation of the incident, including the PHMSA, representatives of the Minnesota Office of Pipeline Safety and the Occupational Health and Safety Administration (OSHA), along with state and local public safety officials. Enbridge expresses its sincere appreciation to the community of Clearbrook, Clearwater County and surrounding areas emergency responders for their professional, diligent and supportive actions.
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