Electric Substations in Maine
67 named substations in Maine, with the highest-voltage facilities listed first. Each substation profile shows voltage class, connected transmission lines, and the datacenter candidate sites closest to it.
At a glance
How is Maine's substation network split by voltage?
By maximum voltage, the named substations break down as 14 at 345–499 kV; 50 at 115–229 kV; 1 at 69–114 kV; 2 withvoltage not recorded. 21% of Maine's named substations operate at 345 kV or above, against 8% across all 16,654 named US substations. The state median of 115 kV is level with the national median of 115 kV.
How does Maine compare with other states?
Maine ranks 40th of 50 states and DC by number of named substations and 35th by named substations at 345 kV or above. It also has 1,183 scored datacenter candidate sites with an average DC Readiness score of 53.5 (national average 53), and an average power sub-score of 33.2 against 37.4 nationally. Most of those sites (1,183) are in the ISO-NE market.
Which substations in Maine have the highest voltage?
| Substation | Max voltage | Connected lines | Line owner |
|---|---|---|---|
| ALBION ROAD | 345 kV | 7 | CENTRAL MAINE POWER CO |
| BUXTON | 345 kV | 5 | CENTRAL MAINE POWER CO |
| CHESTER | 345 kV | 5 | EMERA MAINE |
| CHESTER STATIC VAR COMPENSATOR | 345 kV | 1 | — |
| COOPERS MILLS | 345 kV | 11 | CENTRAL MAINE POWER CO |
| ELIOT | 345 kV | 3 | CENTRAL MAINE POWER CO |
| LARRABEE ROAD | 345 kV | 10 | CENTRAL MAINE POWER CO |
| MAGUIRE ROAD | 345 kV | 8 | CENTRAL MAINE POWER CO |
| MAINE YANKEE | 345 kV | 4 | CENTRAL MAINE POWER CO |
| MASON | 345 kV | 5 | CENTRAL MAINE POWER CO |
| ORRINGTON | 345 kV | 11 | EMERA MAINE |
| RAVEN FARM | 345 kV | 3 | CENTRAL MAINE POWER CO |
| SOUTH GORHAM | 345 kV | 8 | CENTRAL MAINE POWER CO |
| SURROWIEC | 345 kV | 13 | CENTRAL MAINE POWER CO |
| AUGUSTA EAST SIDE | 115 kV | 3 | CENTRAL MAINE POWER CO |
| BATH | 115 kV | 5 | CENTRAL MAINE POWER CO |
| BELFAST | 115 kV | 1 | — |
| BIDDEFORD IP | 115 kV | 1 | CENTRAL MAINE POWER CO |
| BOGGY BROOK | 115 kV | 4 | EMERA MAINE |
| BOWMAN STREET | 115 kV | 3 | CENTRAL MAINE POWER CO |
| BRANCH BROOK | 115 kV | 1 | CENTRAL MAINE POWER CO |
| BROWNS CROSSING | 115 kV | 2 | CENTRAL MAINE POWER CO |
| CROWLEYS | 115 kV | 3 | CENTRAL MAINE POWER CO |
| DETROIT | 115 kV | 4 | CENTRAL MAINE POWER CO |
| DRAGON CEMENT | 115 kV | 1 | CENTRAL MAINE POWER CO |
| EAYMOND | 115 kV | 2 | CENTRAL MAINE POWER CO |
| ELLSWORTH | 115 kV | 2 | EMERA MAINE |
| ELM STREET | 115 kV | 1 | CENTRAL MAINE POWER CO |
| GRAHAM | 115 kV | 7 | EMERA MAINE |
| GRAHAM 46KV | 115 kV | 5 | EMERA MAINE |
| GUILFORD | 115 kV | 2 | CENTRAL MAINE POWER CO |
| GULF ISLAND | 115 kV | 4 | CENTRAL MAINE POWER CO |
| HIGHLAND | 115 kV | 4 | CENTRAL MAINE POWER CO |
| HOTEL ROAD | 115 kV | 2 | CENTRAL MAINE POWER CO |
| KEENE ROAD | 115 kV | 5 | EMERA MAINE |
| KIMBALL ROAD | 115 kV | 5 | CENTRAL MAINE POWER CO |
| LEWISTON LOWER | 115 kV | 2 | CENTRAL MAINE POWER CO |
| LINCOLNVILLE | 115 kV | 2 | CENTRAL MAINE POWER CO |
| LIVERMORE FALLS | 115 kV | 5 | CENTRAL MAINE POWER CO |
| LOUDEN | 115 kV | 7 | CENTRAL MAINE POWER CO |
| MEADOW ROAD | 115 kV | 1 | CENTRAL MAINE POWER CO |
| MOSHERS | 115 kV | 4 | CENTRAL MAINE POWER CO |
| NEWCASTLE | 115 kV | 2 | CENTRAL MAINE POWER CO |
| NORTH AUGUSTA | 115 kV | 2 | CENTRAL MAINE POWER CO |
| NORWAY | 115 kV | 2 | CENTRAL MAINE POWER CO |
| PARK STREET | 115 kV | 1 | CENTRAL MAINE POWER CO |
| POWERSVILLE ROAD | 115 kV | 5 | — |
| PRIDES CORNER | 115 kV | 1 | CENTRAL MAINE POWER CO |
| PUDDLEDOCK RD | 115 kV | 2 | CENTRAL MAINE POWER CO |
| QUAKER HILL | 115 kV | 2 | CENTRAL MAINE POWER CO |
| RILEY | 115 kV | 5 | CENTRAL MAINE POWER CO |
| RUMFORD INDUSTRIAL PARK | 115 kV | 5 | CENTRAL MAINE POWER CO |
| SEWALL | 115 kV | 1 | CENTRAL MAINE POWER CO |
| SPRING STREET | 115 kV | 5 | CENTRAL MAINE POWER CO |
| THREE RIVERS | 115 kV | 4 | CENTRAL MAINE POWER CO |
| TOPSHAM | 115 kV | 4 | CENTRAL MAINE POWER CO |
| WASHINGTON COUNTY | 115 kV | 2 | — |
| WATERBORO | 115 kV | 2 | CENTRAL MAINE POWER CO |
| WEST BUXTON | 115 kV | 4 | CENTRAL MAINE POWER CO |
| WESTBROOK | 115 kV | 5 | CENTRAL MAINE POWER CO |
Every named substation in Maine
All 67 named substations, grouped by voltage band.
345–499 kV · 14
115–229 kV · 50
- AUGUSTA EAST SIDE
- BATH
- BELFAST
- BIDDEFORD IP
- BOGGY BROOK
- BOWMAN STREET
- BRANCH BROOK
- BROWNS CROSSING
- CROWLEYS
- DETROIT
- DRAGON CEMENT
- EAYMOND
- ELLSWORTH
- ELM STREET
- GRAHAM
- GRAHAM 46KV
- GUILFORD
- GULF ISLAND
- HIGHLAND
- HOTEL ROAD
- KEENE ROAD
- KIMBALL ROAD
- LEWISTON LOWER
- LINCOLNVILLE
- LIVERMORE FALLS
- LOUDEN
- MEADOW ROAD
- MOSHERS
- NEWCASTLE
- NORTH AUGUSTA
- NORWAY
- PARK STREET
- POWERSVILLE ROAD
- PRIDES CORNER
- PUDDLEDOCK RD
- QUAKER HILL
- RILEY
- RUMFORD INDUSTRIAL PARK
- SEWALL
- SPRING STREET
- THREE RIVERS
- TOPSHAM
- WASHINGTON COUNTY
- WATERBORO
- WEST BUXTON
- WESTBROOK
- WINSLOW
- WOODSTOCK
- WYMAN HYDRO
- YARMOUTH
69–114 kV · 1
voltage not recorded · 2
Frequently asked questions
How many electric substations are in Maine?
HIFLD records 334 substations in Maine, of which 67 carry a station name. That is the 40th-most named substations of any state in the dataset.
What is the highest-voltage substation in Maine?
14 named substations in Maine share the top voltage of 345 kV, including ALBION ROAD, BUXTON, CHESTER.
Which substation in Maine connects the most transmission lines?
SURROWIEC has the most connected transmission lines of the named substations listed here, with 13 at up to 345 kV.
How many substations in Maine are 345 kV or higher?
14 of 67 named substations (21%) operate at 345 kV or above, compared with 8% nationally. Maine ranks 35th of 50 states and DC for named substations at that level.
How many datacenter candidate sites in Maine are at substations?
134 of the 1,183 scored candidate sites in Maine are substation sites — locations generated at an existing substation. Scored sites across Maine average 53.5 on the 0–100 DC Readiness scale, against 53 nationally.
Looking for a specific record? The directory lists every substation in Maine, A to Z.
More on Maine, and states with similar counts
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Electric substations in Maine”, https://gridcensus.com/substations/maine (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for substations in Maine is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.