U.S. High-Voltage Transmission Siting Regulation and Zoning Ordinances (2026)
This collection includes documented state and local ordinances governing high-voltage transmission lines across the United States. The data were compiled using the Infrastructure Continuous Ordinance Mapping for Planning and Siting Systems (INFRA-COMPASS) tool, which leverages Large Language Models (LLMs) to identify and extract explicit ordinance requirements, including setbacks, maximum height, definitions, permitting, decommissioning, and prohibitions. Extracted records include supporting ordinance excerpts and section references where available. URLs for the source documents are included in the accompanying spreadsheet.
The ordinance GeoPackage file included below contains the jurisdiction shapes for each ordinance. The ordinance GeoPackage file is formatted for ingestion by NLR's reVX setbacks tool and therefore does not include any state-level regulations. A list of all jurisdictions searched during this collection is provided in CSV and GeoPackage format.
**NOTE**: This data was collected with the help of generative AI. The Large Language Models used for this effort make mistakes. Always validate the data for critical use cases. The INFRA-COMPASS version used for collection was v0.28.0. The LLMs used for collection were OpenAI GPT-5.6-luna (document/content filter) and OpenAI GPT-5.4 (value extraction).
Citation Formats
TY - DATA
AB - This collection includes documented state and local ordinances governing high-voltage transmission lines across the United States. The data were compiled using the Infrastructure Continuous Ordinance Mapping for Planning and Siting Systems (INFRA-COMPASS) tool, which leverages Large Language Models (LLMs) to identify and extract explicit ordinance requirements, including setbacks, maximum height, definitions, permitting, decommissioning, and prohibitions. Extracted records include supporting ordinance excerpts and section references where available. URLs for the source documents are included in the accompanying spreadsheet.
The ordinance GeoPackage file included below contains the jurisdiction shapes for each ordinance. The ordinance GeoPackage file is formatted for ingestion by NLR's reVX setbacks tool and therefore does not include any state-level regulations. A list of all jurisdictions searched during this collection is provided in CSV and GeoPackage format.
**NOTE**: This data was collected with the help of generative AI. The Large Language Models used for this effort make mistakes. Always validate the data for critical use cases. The INFRA-COMPASS version used for collection was v0.28.0. The LLMs used for collection were OpenAI GPT-5.6-luna (document/content filter) and OpenAI GPT-5.4 (value extraction).
AU - Castelao, Guilherme
A2 - Sitler, Aidan
A3 - Frey, Julianne
A4 - Addo, Pearl
A5 - Pinchuk, Pavlo
A6 - Sky, Haiku
A7 - Levine, Aaron
DB - Open Energy Data Initiative (OEDI)
DP - Open EI | National Laboratory of the Rockies
DO -
KW - energy
KW - power
KW - high-voltage
KW - siting
KW - regulation
KW - zoning
KW - ordinance
KW - United States
KW - transmission
KW - INFRA-COMPASS
KW - LLM
KW - setback
KW - height
KW - permitting
KW - decommissioning
KW - prohibitions
KW - data
KW - processed data
KW - NLR
KW - reVX
LA - English
DA - 2026/09/29
PY - 2026
PB - National Laboratory of the Rockies
T1 - U.S. High-Voltage Transmission Siting Regulation and Zoning Ordinances (2026)
UR - https://data.openei.org/submissions/8787
ER -
Castelao, Guilherme, et al. U.S. High-Voltage Transmission Siting Regulation and Zoning Ordinances (2026). National Laboratory of the Rockies, 29 September, 2026, Open Energy Data Initiative (OEDI). https://data.openei.org/submissions/8787.
Castelao, G., Sitler, A., Frey, J., Addo, P., Pinchuk, P., Sky, H., & Levine, A. (2026). U.S. High-Voltage Transmission Siting Regulation and Zoning Ordinances (2026). [Data set]. Open Energy Data Initiative (OEDI). National Laboratory of the Rockies. https://data.openei.org/submissions/8787
Castelao, Guilherme, Aidan Sitler, Julianne Frey, Pearl Addo, Pavlo Pinchuk, Haiku Sky, and Aaron Levine. U.S. High-Voltage Transmission Siting Regulation and Zoning Ordinances (2026). National Laboratory of the Rockies, September, 29, 2026. Distributed by Open Energy Data Initiative (OEDI). https://data.openei.org/submissions/8787
@misc{OEDI_Dataset_8787,
title = {U.S. High-Voltage Transmission Siting Regulation and Zoning Ordinances (2026)},
author = {Castelao, Guilherme and Sitler, Aidan and Frey, Julianne and Addo, Pearl and Pinchuk, Pavlo and Sky, Haiku and Levine, Aaron},
abstractNote = {This collection includes documented state and local ordinances governing high-voltage transmission lines across the United States. The data were compiled using the Infrastructure Continuous Ordinance Mapping for Planning and Siting Systems (INFRA-COMPASS) tool, which leverages Large Language Models (LLMs) to identify and extract explicit ordinance requirements, including setbacks, maximum height, definitions, permitting, decommissioning, and prohibitions. Extracted records include supporting ordinance excerpts and section references where available. URLs for the source documents are included in the accompanying spreadsheet.
The ordinance GeoPackage file included below contains the jurisdiction shapes for each ordinance. The ordinance GeoPackage file is formatted for ingestion by NLR's reVX setbacks tool and therefore does not include any state-level regulations. A list of all jurisdictions searched during this collection is provided in CSV and GeoPackage format.
**NOTE**: This data was collected with the help of generative AI. The Large Language Models used for this effort make mistakes. Always validate the data for critical use cases. The INFRA-COMPASS version used for collection was v0.28.0. The LLMs used for collection were OpenAI GPT-5.6-luna (document/content filter) and OpenAI GPT-5.4 (value extraction).},
url = {https://data.openei.org/submissions/8787},
year = {2026},
howpublished = {Open Energy Data Initiative (OEDI), National Laboratory of the Rockies, https://data.openei.org/submissions/8787},
note = {Accessed: 2026-10-20}
}
Details
Data from Sep 29, 2026
Last updated Oct 15, 2026
Submitted Oct 1, 2026
Organization
National Laboratory of the Rockies
Contact
NLR COMPASS Team
