HIFLD Electric Power Transmission Lines

Overview

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 hifld@hq.dhs.gov. 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.

Attributes

line_current

Electric power transmission current type: 'AC' or 'DC'.

string
line_placement

Electric power transmission placement type: 'overhead' or 'underground'.

string
status

Electric power transmission line status: 'in service', 'under construction', 'inactive', 'proposed', or null (not available).

string
source

Original source used to identify geospatial location and/or attribution for the substation.

string
source_datestring
val_method

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).

string
val_date

Date when electric substation location and/or attribution were last validated.

string
owner

Owner.

string
voltage

Voltage.

number
volt_class

Voltage class: '100-161', 'under 100', '220-287', '345', '500', '735 and above', 'dc'.

string
inferred

Indicates whether or not voltage / volt_class was inferred.

boolean
sub_1string
sub_2string