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Franklin County proposes short reroute to reopen Old Highway 100 within weeks
Summary
County highway staff presented a plan to shift Old Highway 100 about 28 feet north, reuse existing asphalt millings for the roadbed and aim to reopen the road in roughly four weeks, pending utility sign-offs and final preparations.
Franklin County highway staff told commissioners they plan to reroute Old Highway 100 about 28 feet to the north and reopen the road in about four weeks if utility confirmations and routine preparations go as expected, Highway Department staff said during a county commission meeting.
County highway staff said the proposed reroute is substantially less expensive than fully stabilizing the slide area and would use millings from the existing pavement as base material, with about 10 to 12 inches of base and new asphalt laid on top.
The Highway Department staff said an engineering study and further field work showed the soil north of the existing alignment is substantially more stable than the subsurface beneath Old Highway 100. Staff reported finding an 8-inch high-pressure gas line roughly 3.5 to 4 feet below the current pavement and…
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