Oil leaking from a tanker truck at a Boyden co-op has caused a blue-colored oily sheen in a creek running past the town.
The Iowa Department of Natural Resources traced the source of the leak to the truck at the Farmers Co-op Society in Boyden. The co-op manager estimated than about 1,100 gallons of white mineral oil leaked from the tank sometime during the past two weeks, the DNR said in a news release.
The sheen was reported Monday morning and has traveled about six miles downstream. DNR staff have seen no dead fish in the water.