DULUTH — The Minnesota Department of Transportation will begin grinding concrete in the Interstate 35 tunnels in Duluth on Monday. Drivers should expect intermittent single-lane traffic during work hours. The northbound I-35 entrance ramps and southbound exit ramp at Lake Avenue will close for one full day in the middle of next week. The department has not specified the day. Work is expected to continue through Oct. 8.
I-35 tunnel work to begin in Duluth
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