SDOT has shared this update:

The contractor working for the Seattle Department of Transportation (SDOT) will close all eastbound lanes of the Spokane Street Viaduct from First to Fourth avenues S overnight, beginning Sunday night, to prepare for the Monday morning opening of the Fourth Avenue S Off-ramp. The closure is necessary to remove the concrete barrier and to patch surface concrete where the barrier was connected to the viaduct deck.

Crews will place temporary barriers where the new off-ramp meets with the upper roadway to allow for a daylight opening of the ramp.

All eastbound lanes will be open by 5:00 a.m. Monday and the new Fourth Avenue S Off-ramp will be opened after the morning commute.

The overnight closure begins at 10:00 p.m. Sunday, August 15, and will be complete by 5:00 a.m. Monday, August 16.