The electric power system consists of 5 substations which step down the voltage from 69,000 volts to 12,470 volts. The current is then distributed through 18 feeder lines to neighborhood transformers to serve over 9,200 electric customers. The system has 217 miles of power lines of which 83% are underground with that percentage growing every year due to conversion projects. The peak demand city wide in 2010 was 58.5 MW down from a historical high of 60.9 MW in 2006.