Residents who spot a helicopter in the area are likely seeing a chopper surveying Eversource transmission lines. The helicopter will be carrying high-resolution cameras documenting the condition of structures, lines and other electrical equipment.

The surveillance will take place this week, covering Bethel, Brookfield, Fairfield, New Milford, Norwalk, Weston, Westport and Wilton.

All flights are weather permitting and most will take place between the hours of 7 a.m. and dusk. The helicopter assigned to this project is black with a registration number N175JL.