Apparently the sign announcing construction on the
South Capitol Street Bridge has reappeared, and I'm hearing that this is the beginning of the rehab work on the existing bridge. (No, not the construction of the new one, that won't begin before 2011!) There won't be lane closures right away, but look for some probably on weekends in the near future.
DDOT hasn't yet posted anything about it on its web site--when they do, I'll post, of course.