In partnership with the Mid-Atlantic Ocean Data Portal, updates to the Electric Transmission Lines and Electric Substations map layers are now available in the Energy & Infrastructure theme map and in the Data Explorer.

The Electric Transmission Lines layer shows the routes of above-ground, underground, and submarine power lines throughout the Mid-Atlantic and Northeast regions. Line voltages are represented by varying colors and widths. The Electric Substations layer shows the locations of electric substations with voltages of 69 kilovolts or higher throughout the Mid-Atlantic and Northeast. Voltage levels are represented by varying colors, and larger squares indicate facilities with higher capacities.

The new layers represent the latest information from the Homeland Infrastructure Foundation Level Database, as of September 2019. The data were clipped by state boundaries from Maine to the Virginia-North Carolina border.

Map of electric transmission lines and substations