BATTLE CREEK, Mich. – The company responsible for an oil spill making its way down the Kalamazoo River said Wednesday it has redoubled its efforts to clean up the mess.

At the same time, state and local officials vowed not to let the massive oil spill in the Gulf of Mexico overshadow their cleanup efforts.

Enbridge Inc., whose pipeline leaked more than 800,000 gallons of oil into Talmadge Creek, which runs into the river, said it is doubling the number of workers sent to help contain and clean the large spill. The Calgary, Alberta-based company had about 200 employees and contractors working on the spill on Tuesday. The Environmental Protection Agency also is bringing in additional contractors, likely pushing the overall workforce on the spill to more than 400 people.

As of late Tuesday, the Monday spill near Marshall had killed fish and coated wildlife as it made its way westward about 35 miles downstream past Battle Creek, a city of 52,000 residents about 100 miles northwest of Fort Wayne. Company officials planned to update the containment and cleanup progress at a news conference later Wednesday.

The spill was a drop in the bucket compared to the massive spill in the Gulf of Mexico, but it is still quite large. Government and company officials have vowed not to let the Gulf spill diminish their cleanup efforts in Michigan.

The amount of oil spilled in Michigan would be enough to fill enough 1 gallon jugs, lined side by side, to stretch for nearly 70 miles. It would also fill a walled-in football field, including the end zones, with a 14-foot-high pool of oil.

Gov. Jennifer Granholm has declared a state of disaster for Calhoun County and potentially affected areas along the river, and President Obama called Granholm to offer federal support.

“The Gulf spill has raised awareness about oil spills and the damage they can do and helped make people more interested,” said Dave Petroelje, west Michigan director of the environmental group Clean Water Action.

State officials said they don’t believe the oil will spread past a dam at Morrow Lake, a few miles downstream from Battle Creek and upstream of Kalamazoo, the largest city in the region. Officials don’t believe the oil could make it to Lake Michigan, some 80 miles west, where coastal communities are heavily dependent on summer tourism.

On Wednesday, an oily reflective sheen could be seen in patches along the Kalamazoo, and the affected area still had a strong odor, although not as strong as on Tuesday.