The Eighth Street bridge over Valley Creek will be closed today from 9 a.m. to 11 a.m., launching the first work leading to the eventual replacement of the twin trestles.
Eighth Street will be closed over either Valley or Tumwater creeks between 9 and 11 every morning this week.
When the Valley Creek span is closed, the detour route will be Cherry Street to Marine Drive and up Cedar Street, civil engineer Jim Mahlum said.
The detour when the Tumwater bridge is closed will follow Cedar to Marine Drive, up Tumwater Street to Fifth Street, then Fifth to A Street and south to Eighth.
Further information is available by calling Mahlum at 360-417-4701.