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History of Secondary Highway 575 (#1):
The first Secondary Highway 575 was a local highway in the District of Cochrane that provided access from Highway 101 to Night Hawk Lake, located east of Timmins.
Highway 575 was first designated by an Order-in-Council dated May 9, 1956. The route, which had been known previously as the Peninsula Road, was first depicted on a
Preliminary Route Plan prepared by the Department of Highways of Ontario (DHO) in June, 1956. The highway was gravel-surfaced at the time of designation in 1956, and
remained so until the route was re-designated as a Tertiary Highway in the early 1970s. The route of Highway 575 was formally re-designated as
Highway 803 by an Order-in-Council, effective July 2, 1970. A different, unrelated
Highway 575 has existed in the Sudbury area since 1974.
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