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This feature class represents electric power substations located within 20 miles of the coastline in the continental US and Puerto Rico, including facilities that switch, transform, or regulate voltage. The data includes taps where transmission lines interconnect and extends inland along major rivers and bays. Data for Alaska, Hawaii, and other US territories is absent, and Puerto Rico's information predates the 2017 hurricane season.
Data is provided in ZIP and PDF formats. Users should note the incomplete geographic coverage and the potentially outdated data for Puerto Rico before application.