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| Layer Name | Data Source | Citation | Date Published | Web Link | Download |
|---|---|---|---|---|---|
Planned Transmission Projects | |||||
| Planned Transmission Projects | Horizon Climate Group | Abramson, E., Chilcote, M., Gastelum, D., McFarlane, D., Prorok, M., Planned Transmission Projects National Shapefile, Horizon Climate Group, April 2025 | April 2025 |
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Available Soon |
Existing Transmission Lines | |||||
| Existing Transmission Lines | US Dept of Homeland Security HIFLD | US Department of Homeland Security, Homeland Infrastructure Foundation-Level Data, Transmission Lines, December 11, 2022, https://hifld-geoplatform.hub.arcgis.com/datasets/geoplatform::transmission-lines/about | December 11, 2022 |
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Existing Electric Substations | |||||
| Existing Electric Substations | ORNL, LANL, INL, NGA & HSIP | Oak Ridge National Laboratory (ORNL), Los Alamos National Laboratory (LANL), Idaho National Laboratory (INL), National Geospatial-Intelligence Agency (NGA), Homeland Security Infrastructure Program (HSIP) Team, Electrical Substations, April 2022, https://gem.anl.gov/tool | April 2022 |
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B2B High Voltage DC Ties | |||||
| B2B High Voltage DC Ties | Horizon Climate Group, 2025, based on NREL and US DOE | Elizabeth Abramson, Horizon Climate Group, US B2B High Voltage DC Ties shapefile, based on NREL and US DOE, April 2025, ourgridfuture.org | April 2025 |
NREL
US DOE
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Available Soon |
NIETC Corridors | |||||
| NIETC Corridors | US DOE | U.S. Department of Energy, Grid Deployment Office, “Phase 3 Potential National Interest Electrical Transmission Corridors (December 16, 2024),” December 16, 2024, https://gem.anl.gov/tool | December 16, 2024 |
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Regional Transmission Organizations | |||||
| Regional Transmission Organizations | ORNL, LANL, INL, NGA & HSIP | Oak Ridge National Laboratory (ORNL), Los Alamos National Laboratory (LANL), Idaho National Laboratory (INL), National Geospatial-Intelligence Agency (NGA), Homeland Security Infrastructure Program (HSIP) Team, Independent System Operators, November 8, 2021, https://hub.arcgis.com/datasets/50f80920d36e435d9a34db2bd0fd3ad8_0/about | November 8, 2021 |
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Electric Utility Territories | |||||
| Electric Utility Territories | ORNL, LANL, INL, NGA & HSIP | Oak Ridge National Laboratory (ORNL), Los Alamos National Laboratory (LANL), Idaho National Laboratory (INL), National Geospatial-Intelligence Agency (NGA) Homeland Security Infrastructure Program (HSIP) Team, Electric Retail Service Territories, November 8, 2021, https://atlas.eia.gov/datasets/f4cd55044b924fed9bc8b64022966097_0/about | November 8, 2021 |
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Available Soon |
NERC Regions | |||||
| NERC Regions | US Energy Information Administration (EIA) and North American Electric Reliability Corporation (NERC) |
US Energy Information Administration, NERC Regions, January 13, 2020, https://atlas.eia.gov/datasets/eia::nerc-regions/about North American Electric Reliability Corporation, ERO Enterprise | Regional Entities, accessed January 31, 2025, https://www.nerc.com/AboutNERC/keyplayers/pages/default.aspx |
January 13, 2020 |
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Available Soon |
Interconnection Seams | |||||
| Interconnection Seams | NERC | North American Electric Reliability Corporation, ERO Enterprise Regional Entities, accessed January 31, 2025, https://www.nerc.com/AboutNERC/keyplayers/pages/default.aspx. | January 31, 2025 |
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Available Soon |
Electric Generation Plants | |||||
| Electric Generation Plants | EPA eGRID 2022 | US Environmental Protection Agency, Emissions & Generation Resource Integrated Database (eGRID), 2022 data, January 2024, https://www.epa.gov/egrid | January 2024 |
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Wind Electricity Projects | |||||
| Wind Electricity Projects | United States Wind Turbine Database v7.0 | Hoen, B.D., Diffendorfer, J.E., Rand, J.T., Kramer, L.A., Garrity, C.P., and Hunt, H.E., 2018, United States Wind Turbine Database v7.0 (May 10, 2024): U.S. Geological Survey, American Clean Power Association, and Lawrence Berkeley National Laboratory data release, https://doi.org/10.5066/F7TX3DN0 | May 10, 2024 |
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Solar Electricity Projects | |||||
| Solar Electricity Projects | United States Large-Scale Solar Photovoltaic Database v1.0 | Fujita, K.S., Ancona, Z.H., Kramer, L.A., Straka, M., Gautreau, T.E., Garrity, C.P., Robson, D., Diffendorfer, J.E., and Hoen, B., 2023, United States Large-Scale Solar Photovoltaic Database v1.0 (November, 2023): U.S. Geological Survey and Lawrence Berkeley National Laboratory data release, https://doi.org/10.5066/P9IA3TUS | November 2023 |
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Urban Areas | |||||
| Urban Areas | US Census Bureau | US Census Bureau, Geography Division, 2022 TIGER/Line Shapefiles: Uban Areas (2020), January 6, 2023, https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2022&layergroup=Urban+Areas | January 6, 2023 |
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Available Soon |
US Counties | |||||
| US Counties | US Census Bureau | US Census Bureau, Geography Division, 2022 TIGER/Line Shapefiles: Counties (and equivalent)(2020), September 30, 2022, https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2020&layergroup=Counties+%28and+equivalent%29 | September 30, 2022 |
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Available Soon |
Tribal & Indigenous Lands | |||||
| Tribal & Indigenous Lands | US Census Bureau | US Census Bureau Geography Division 2024 TIGER/Line® Shapefiles, American Indian/Alaska Native/Native Hawaiian Areas, 2024, https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2024&layergroup=American+Indian+Area+Geography | 2024 |
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Available Soon |
Disadvantaged Communities | |||||
| Disadvantaged Communities | Council on Environmental Quality (CEQ) | Council on Environmental Quality, Climate and Economic Justice Screening Tool Version 2.0, December 2024, https://screeningtool.geoplatform.gov/en/downloads#3/33.47/-97.5. | December 2024 |
View Source
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Available Soon |
National, State, and Regional Parks | |||||
| National, State, and Regional Parks | Esri and TomTom North America | Esri and TomTom North America, Inc., USA Parks, October 14, 2024, https://www.arcgis.com/home/item.html?id=578968f975774d3fab79fe56c8c90941 | October 14, 2024 |
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Critical Habitat for Threatened & Endangered Species | |||||
| Critical Habitat for Threatened & Endangered Species | US Fish & Wildlife Service | US Fish & Wildlife Service Environmental Conservation Online System (ECOS), Critical Habitat for Threatened & Endangered Species, January 7, 2025, https://ecos.fws.gov/ecp/report/table/critical-habitat.html | January 7, 2025 |
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About Our Grid Future
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April 2025
Our Grid Future
, 2025, is developed and maintained by Horizon Climate Group
.
Project development and data collection on planned transmission projects was conducted in association with
Horizon Climate Group
and Great Plains Institute
. The project team would like to thank Aparna Narang and Hella Cohen for their collaboration.
Authors
| Software development and design: | Dane McFarlane |
| Research and GIS analysis: | Elizabeth Abramson |
| Additional outreach: | Diana Gastelum, Maya Chiclote, and Matt Prorok |
Suggested Citation:
For the planned transmission data layer:
Abramson, E., McFarlane, D., Gastelum, D., Prorok, M., Chilcote, M., Planned Transmission Projects National Shapefile, Our Grid Future, Horizon Climate Group, April 2025
For maps, data layers, and other information:
Horizon Climate Group, Our Grid Future, April 2025.
http://www.ourgridfuture.org
http://www.ourgridfuture.org
Planned Transmission Projects
GIS Data Layer
April 2025
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The Our Grid Future Planned Projects layer was created by Elizabeth Abramson and Dane McFarlane, Horizon Climate Group, 2025, in coordination with Matthew Prorok, Diana Gastelum, and Maya Chilcote, Great Plains Institute.
Goal
Create and share a geographic database of planned high-capacity electric transmission lines in the United States.
Rationale
Creating, maintaining, and publishing the planned transmission projects data layer is meant to:
- Build solutions to beneficial transmission planning
- Enable greater transparency and early engagement of stakeholders
- Work constructively to solve siting issues early on
- Help the advocacy community identify priorities for planning and permitting work
- Allow users to see where in the country transmission planning has already occurred at scale and where it has not
Included Projects
The planned projects layer is focused on high-voltage transmission expansion and new system capacity, which are key to enabling:
- Regional and national electric decarbonization
- Economic growth
- Grid resilience
- 230 kV or higher
- New lines
- Line upgrades
- Line rebuilds
- Line reconductoring projects
Authors
| Research and GIS analysis: | Elizabeth Abramson |
| Research and outreach: | Diana Gastelum, Maya Chilcote, and Matt Prorok |
| Software development and design: | Dane McFarlane |
Suggested Citation
Abramson, E., McFarlane, D., Gastelum, D., Prorok, M., Chilcote, M., Planned Transmission Projects National Shapefile, Our Grid Future, Horizon Climate Group, April 2025
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Electric Substations
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Created by
Horizon Climate Group, 2025
Horizon Climate Group, 2025
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