A company operating a pipeline that dumped more than 800,000 gallons of oil into a southern Michigan river says it's doubling its work force on the containment and cleanup effort.

Officials with Calgary, Alberta-based Enbridge Inc. made the announcement during a Wednesday update on the spill. The company
had about 200 employees and contractors working on the spill a day
earlier.

The Environmental Protection Agency also is bringing in additional contractors.

Oil leaking from a 30-inch pipeline coated birds and fish as it poured into a creek and flowed into the Kalamazoo River, one of the state's major waterways, before it was shut off Monday.

Enbridge estimates 819,000 gallons spilled. The state says it was told during a company briefing an estimated 877,000 gallons spilled.

Democratic U.S. Rep. Mark Schauer of Michigan has said Enbridge was slow in alerting federal authorities to the spill.

The pipeline carries about eight million gallons of oil daily from Griffith, Indiana to Sarnia, Ontario.

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