Norwich Public Utilities crews Connecticut have begun tearing down some of the utility’s oldest structures, including transmission towers and a control room dating back to 1890, reports The Day.

The control room once accompanies the city’s first coal-fired electric generation plant, built eight years after Thomas Edison oversaw construction of the world’s first plant of its kind. The plant was torn down in 1970 to make room for utility trucks and equipment, but the control room remained in use through 1999. The utility also plans to demolish two towers with about two dozen electrical lines connected between the two, but only six are active.

NPU crews in bucket trucks have started disconnecting and removing unused wires. The live wires will be transferred to utility poles to be erected before the towers are demolished.