Update - May 2004
The number for Bureau of Highways, Department of Public Works is 410-313-7450.
They do sidewalk repair. They do not do driveway apron repair, you have to get a private contractor. The info on this page just indicates that you need to get a permit from Public Works before having a driveway apron repaired.
FYI - Stacy Ichinowski reported the bumps in the sidewalk in front of 3000 Pebble Beach and 3100 Dunes Dr. They're should come out to inspect them in 2-3 weeks. They couldn't say how long it would be to get them repaired after that.