BOISE, Idaho — Harry F. Magnuson, whose keen investments in northern Idaho mining companies helped place him among Idaho's giants in industry and philanthropy, has died. He was 85.

Magnuson, who had homes in Idaho and Hawai'i, died of cardiac arrest Saturday night in Spokane, Wash.

Among Magnuson's most notable accomplishments is preventing the northern Idaho town of Wallace, where Magnuson was born on March 14, 1923, from disappearing because of declines in the mining industry.