A.C. “Bud” Pasmore, a key founder of Clark County’s annual Inter-service Walk & Knock food drive, died Tuesday.Archie Campbell Pasmore was 90 years old and died of natural causes after a time in hospice, according to his daughter, Mary Bailey.A volunteer-powered, countywide food drive seemed a “crazy idea” in the early 1980s, according to the Walk & Knock website — but it took off quickly and grew to become the single largest annual food drive in the area, transforming Clark County’s charitable landscape with its highly visible and successful demonstration of people helping people.“That’s a heavy duty loss,” said his partner in creating the tradition, Doug Rae. “Bud was a giant in the community when it came to Walk & Knock.”Just last year, Walk & Knock celebrated its 25 anniversary and — despite a lingering economic downturn — set new records both for tons of food collected and for money donations as well. There were 162 tons of food and $50,000 in cash and checks.Road builderDaughter Bailey said Pasmore was a native of Canada who came to the U.S. when he was 20. He worked at Vancouver’s Alcoa aluminum plant during the early days of World War II. Then he went to work as a streetcar operator in Portland. He got tired of being asked why such an able-bodied young man wasn’t serving in the military, Bailey said — the answer was that he was not a U.S. citizen — and eventually got into the Navy. The heavy equipment skills he learned there led to his eventual career as operations and maintenance manager for Clark County Public Works, a job he held from the late 1960s through 1989.