DETROIT (WWJ) – A final report detailing the cause of a 2010 pipeline rupture in southern Michigan is being delayed.

WWJ Newsradio 950’s Paul Snider tells us that the report had been expected anytime now but the release is being delayed until fall.

READ MORE: ACLU Sues Michigan State Police, Claims Racial Profiling, Black Drivers Pulled Over More

According to the National Transportation Safety Board, it’s because of other ongoing investigations into unrelated pipeline incidents.

READ MORE: Woman Finds 95-Year-Old Message In A Bottle In Michigan

An NTSB spokesman says the investigation is looking into a number of potential causes, including pipeline operations and materials, and human error.

The July, 2010, spill sent more than 800,000 gallons of oil into the Kalamazoo River and a tributary, when a 30-inch pipeline owned be western Canada-based Enbridge Inc. ruptured.

MORE NEWS: Here's A List Of Bills Gov. Whitmer Signed Into Law Thursday

Cleanup operations continue.