The two charges are misdemeanors, and could carry a fine of up to $1,000 and no more than a year in jail for each, Atlanta Police spokeswoman Kimberly Maggart said.
The pedestrian, 54-year-old Ruby Nell Rhodes of Atlanta, has not been charged, Maggart said.
Police said Lewis was given a green arrow to turn left onto Hamilton E. Holmes Drive from Martin Luther King, Jr. Drive in Atlanta, as Rhodes was walking west in the middle of the crosswalk on Holmes. As the bus was turning and crossed over the crosswalk, police said, the rear portion of the bus struck Rhodes and caused her to fall to the ground, severing her leg and opposite foot.
Cobb County spokesman Robert Quigley said Lewis has not driven a CCT bus since the incident, though he could not comment whether Lewis was on paid or unpaid leave.
The county contracts the management of its drivers out to Veolia Transportation, which is headquartered in Lombard, Ill., and Quigley said Lewis' employment status would be Veolia's decision. Valerie Michael, spokeswoman for Veolia, said on Friday morning she could not speak on the matter but that the company would be issuing a statement later that afternoon.
No statement was received by press time, and Michael did not return subsequent phone calls.
Maggart said Lewis' court date has been set for Feb. 15 at 9 a.m. in Fulton County Magistrate Court.