The mine, which yielded copper, gold and palladium, operated from about 1904 to the early 1940s, when a lack of workers during World War II led to its closure.
The specific cleanup work won't be finalized until the other owners of the site, such as the state and the Organized Village of Kasaan, have their say, said Michael Wilcox, the Forest Service's on-scene coordinator.
The Organized Village of Kasaan is the tribal government for the small Haida village on east Prince of Wales Island.
The work will focus on the Forest Service-owned portion and not the state's tidelands, with the options ranging from posting more signs to barging contaminated soil to the Lower 48.
Besides getting rid of the contaminants, the Forest Service is considering the removal of dilapidated structures.
The U.S. Forest Service also got $1.4 million for cleanup efforts at Resurrection Creek, a gold mining site near Hope.
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