HIFLD Electric Power Transmission Lines
This feature class/shapefile is for the Homeland Infrastructure Foundation Level Database (HIFLD) https://gii.dhs.gov/HIFLD as well as the Energy modelling and simulation community.Data source:Oak Ridge National Laboratory (ORNL) Data and details are hosted by HIFLD as received from the data provider. For questions /feedback, please email firstname.lastname@example.org. This feature class/shapefile represents electric power transmission lines. Transmission Lines are the system of structures, wires, insulators and associated hardware that carry electric energy from one point to another in an electric power system. Lines are operated at relatively high voltages varying from 69 kV up to 765 kV, and are capable of transmitting large quantities of electricity over long distances. Underground transmission lines are included where sources were available. The following updates have been made since the previous release: 3,319 features added.
Electric power transmission current type: 'AC' or 'DC'.
Electric power transmission placement type: 'overhead' or 'underground'.
Electric power transmission line status: 'in service', 'under construction', 'inactive', 'proposed', or null (not available).
Original source used to identify geospatial location and/or attribution for the substation.
Methodology used to validate geospatial location and/or attribution for the feature: 'unverified' (could not be located or the feature has not yet been validated), 'imagery' (best available imagery used to determine the location), 'imagery/other' (imagery and supplemental open source information used to determine the location), 'other' (open source information used to determine the location).
Date when electric substation location and/or attribution were last validated.
Voltage class: '100-161', 'under 100', '220-287', '345', '500', '735 and above', 'dc'.
Indicates whether or not voltage / volt_class was inferred.