Getting around South Lake Union might not be easy this weekend.

The Seattle Department of Transportation is closing Mercer Street between Dexter and 5th Avenue North in Seattle starting Friday night.

At the same time, Highway 99 will be closed between the Battery Street tunnel and Valley Street.

Drivers will be detoured to Interstate 5 at 85th Street north of the closures or at East Marginal Way and Spokane Street in south Seattle.

The closures start at 11 p.m. Friday, July 5th and last through 5 a.m. on Monday July 8th.

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