The pipeline that oozed oil into the Oak Glen Nature Preserve near Cincinnati, OH a week ago leaked more crude oil than originally estimated—about two times more.
Federal investigators now estimate that 20,000 gallons leaked last week, threatening the drinking supply and wildlife in the area, the Associated Press reported.
Sunoco spokesman Jeff Shields said a clamp has been engineered just for the 20-inch diameter pipeline as part of a federally approved plan. While Shields said the pipeline had a 5-inch crack, the U.S. Environmental Protection Agency says the matter is still under investigation.
The pipeline has been repaired and reopened on Monday, according to Sunoco Logistics. Sunoco had turned off a stretch of the pipeline from Hebron, KY, to Lima, OH as a result of the leak. The new clamp was tested before oil resumed flowing.
The company owns most of the Mid-Valley Pipeline Co. pipeline, which extends 1,000 miles from Michigan to Texas.
The pipeline carries crude oil to refineries in Ohio and Oregon. Inspectors last checked it in 2011. A system-wide inspection of the 1,119-mile-long pipeline five years ago resulted in a $48,700 fine for Sunoco, which did not address corrosion problems in the pipeline.