It took DDOT 4 weeks to go out and inspected. Then few more weeks, they realized it's not DDOT responsible, they referred the case to DC Water on June 4th (and closed the case). I got email today (dated June 16) it's closed (took them 1 1/2 weeks to notified me). I called DDOT expressed I'm not satisfied how this was handled. And I'm sure it's still open because DC Water has to fix hole.

Comments update: 15-00104082-Sidewalk Repair
336 Pennsylvania Ave SE, Washington, District of Columbia
This issue has an image. You can view it here http://seeclickfix.com/issues/1613143 . Sidewalk Pothole needs repair.
By TAPP, MERIKA: 5/18/2015 7:59:25 AM
Sink hole in tree box space a PEPCO meter is near and some grate are near the area that is. Sinking refer to SIOD, Per Inspector NICKENS
Completed Inspection On: 5-16-2015
Referring to DDOT SIOD Division for scheduling.
Scheduling contingent upon funding and weather.
Contact DDOT Customer Service Center: 202-671-2700 for more information.

By DOGGETT, QUARTNEY R: 6/4/2015 2:36:35 PM
Inspections to be performed on 6/6/2015 - results will follow

By DOGGETT, QUARTNEY R: 6/6/2015 4:10:13 PM
Per R White - Further investigation is needed due to the different utilities in the same area as the issue.

By DOGGETT, QUARTNEY R: 6/16/2015 12:08:06 PM
per inspector - DC Water has been contacted (ref#1548816) for repairs of the sinkhole in the tree box.