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Short Citation:
Office for Coastal Management, 2024: Electric Power Substations,

Item Identification

Title: Electric Power Substations
Status: Completed
Publication Date: 2017-07-24

This feature class represents known electric power substations within the continental US and Puerto Rico that are located within 20 miles of the coastline. Substations are facilities and equipment that switch, transform, or regulate electric voltage. This data set includes taps, a location where power on a transmission line is tapped by another transmission line. Many large rivers and bays hydrologically related to coastal waters were considered part of the coastline to make this data set as detailed and complete as possible. Therefore, applicable substations as far inland as Washington D.C., for example, are included. This data set is currently incomplete; data for Alaska, Hawaii and all of the US sovereign territories (except Puerto Rico) was not available at the time of creation. Although data for Puerto Rico is present, it dates from before the 2017 hurricane season, so the current validity is questionable. This product will be updated as new data becomes available.


To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act.


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ISO 19115 Topic Category
ISO 19115 Topic Category
None coastal
None planning
None renewable energy

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
None Territorial Sea
None United States of America

Physical Location

City: North Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: Map (digital)
Distribution Liability:

Data Set Credit: Oak Ridge National Laboratory, Bureau of Ocean Energy Management, NOAA Office for Coastal Management

Support Roles

Point of Contact

CC ID: 1115399
Date Effective From: 2018-06
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1115411
W° Bound: -129.980235
E° Bound: -64.925635
N° Bound: 55.947638
S° Bound: 17.947394

Access Information

Security Class: Unclassified
Data Use Constraints:

For coastal and ocean planning

Distribution Information

Distribution 1

CC ID: 1115400
Download URL:

Distribution 2

CC ID: 1121198
Download URL:

Ocean Reports

Technical Environment


Windows 10.1, Version 6.2 (Build 9200); Esri ArcGIS

Data Quality


No formal attribute accuracy test was conducted. The attributes in this dataset are believed to be accurate.

Horizontal Positional Accuracy:

All records were verified to occur within the spatial domain of the feature class/shapefile. Maximum scale of intended use is 1:80,000.

Completeness Report:

Data from the authoritative sources (identified through open source research) is assumed to be correct and accurate. Spatial and attribute properties are believed to be complete, although attribute information has been simplified. Geometric thresholds from original data are preserved. No tests have been completed for exhaustiveness.

Conceptual Consistency:

These data are believed to be logically consistent. Geometry is topologically clean. During quality control, attributes were checked to ensure that they fell within the expected ranges or had expected/valid values. Text attribute values were checked for spelling and usage consistency. No topology tests were conducted.




CC ID: 1115405
Contact Name: Department of Homeland Security
Extent Type: Discrete
Extent Start Date/Time: 2017-07-24
Citation URL:
Citation URL Name: Source Online Linkage
Citation URL Description:

URL where the source data were originally accessed.

Source Contribution:

Continuously updated point vector dataset of all electrical substations in the United States, plus Puerto Rico.


CC ID: 1115406
Contact Name: NOAA OCS
Extent Type: Discrete
Extent Start Date/Time: 2018-02-08
Citation URL:
Citation URL Name: Source Online Linkage
Citation URL Description:

URL where the source data were originally accessed.

Source Contribution:

Polygon vector file depicting coastal and waters controlled by states as per the Submerged Lands Act. Utilized in this context as a source depicting the coastline of the USA.

Process Steps

Process Step 1

CC ID: 1115407

Remove superfluous attributes and rename remaining attributes as directed.

Process Date/Time: 2018-04-11 03:00:00

Process Step 2

CC ID: 1115408

Project all source layers into WGS_1984_World_Mercator.

Process Date/Time: 2018-04-11 01:00:00

Process Step 3

CC ID: 1115409

Use "select by location" to remove all substations located more than 20 miles from the coastline. Use "select by attribute" to remove all substations located outside the USA.

Process Date/Time: 2018-04-11 02:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Substations

Catalog Details

Catalog Item ID: 66139
GUID: gov.noaa.nmfs.inport:66139
Metadata Record Created By: Brianna Key
Metadata Record Created: 2021-12-22 03:39+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:10+0000
Metadata Record Published: 2021-12-22
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2021-12-22
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2022-12-22