A state report on the response to the 2013 flooding in Galena says more than 5,000 containers of hazardous material scattered throughout the area during the disaster were collected.
The containers ranged from aerosol cans to 55-gallon drums, with the hazardous debris strewn within a 15-mile radius of the Yukon River village.
An environmental program specialist with the agency estimated the cleanup cost at well over $1 million, costs that will be included as the state seeks reimbursement from the Federal Emergency Management Agency.