The incident happened about 8:30 a.m. Tuesday as an operator was fueling a tanker truck and the fuel dispenser failed to shut off, said Karl Rockeman, director of the health department’s Division of Water Quality.
About 1,286 gallons of diesel fuel spilled, according to initial estimates. About 500 gallons migrated through the camp’s storm drain into Devils Lake, Rockeman said.
Health department staff were on site Tuesday and monitoring the investigation and cleanup.
The contamination was contained and work was underway to clean remaining fuel from the stormwater drain, he said.
Rockeman said the spill should not affect fishing or recreation on Devils Lake. He advised people to avoid the area immediately around Camp Grafton as cleanup activities will be ongoing.
Camp Grafton is about 6 miles south of Devils Lake.