Just in from the King County Department of Transportation:

The King County Road Services Division will close the South Park Bridge over the Duwamish River on 14th/16th Avenue South this Saturday, Aug. 29 from 7 a.m. to 7 p.m. for repairs. The bridge will be closed to vehicle and pedestrian traffic over the bridge and to large marine vessels on the water.

The repairs involve drawbridge alignment – more details here.