State Route 21 will close starting 6 a.m. on Monday, Sept. 14.
Closure is for bridge deck repairs just north of Kahlotus.
Work will occur Monday through Thursday from 6 a.m. to 4:30 p.m. until Sept. 25.
Local traffic can access both sides of the bridge; through traffic will be diverted.
Detours will direct travelers east on SR 26 to Washtucna and west on SR 261.