Continuing demolition work on the eastbound Nalley Valley project means overnight and early morning closures this week, according to the state Department of Transportation.
The closures will take place on eastbound state Route 16 at Union Avenue and the on-ramp from Union Avenue to eastbound SR 16.
They will be from 11 p.m. Thursday to 4 a.m. Friday; 12:30 a.m. to 5:30 a.m. Saturday; 12:30 a.m. to 7 a.m. Sunday; and midnight to 4 a.m. Monday.
Traffic will be diverted off SR 16 at Union Avenue. A signed detour will lead drivers to Interstate 5.
Also on Friday night, WSDOT crews will shut down all lanes of South Center Street between South Pine and South Wilkeson streets while they demolish a portion of the old viaduct spanning South Center Street.
People can access businesses from South Wilkeson Street.
The Nalley Valley project is replacing the eastbound SR 16 structure and completing the SR 16/Sprague Avenue interchange. The westbound Nalley Valley viaduct opened June 2011.