Electric Substations in Idaho
274 named substations in Idaho, 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 Idaho's substation network split by voltage?
By maximum voltage, the named substations break down as 4 at 500 kV and above; 7 at 345–499 kV; 33 at 230–344 kV; 149 at 115–229 kV; 54 at 69–114 kV; 23 below 69 kV; 4 withvoltage not recorded. 4% of Idaho's named substations operate at 345 kV or above, against 8% across all 16,654 named US substations. The state median of 138 kV is above the national median of 115 kV.
How does Idaho compare with other states?
Idaho ranks 17th of 50 states and DC by number of named substations and 37th by named substations at 345 kV or above. It also has 2,171 scored datacenter candidate sites with an average DC Readiness score of 51.7 (national average 53), and an average power sub-score of 37.9 against 37.4 nationally. Most of those sites (2,164) are in the WECC market.
Which substations in Idaho have the highest voltage?
| Substation | Max voltage | Connected lines | Line owner |
|---|---|---|---|
| DWORSHAK | 500 kV | 3 | BONNEVILLE POWER ADMINISTRATION |
| HATWAI | 500 kV | 5 | BONNEVILLE POWER ADMINISTRATION |
| HEMINGWAY | 500 kV | 3 | PACIFICORP |
| MIDPOINT (500KV) | 500 kV | 2 | IDAHO POWER CO |
| 3 MILE KNOLL | 345 kV | 8 | PACIFICORP |
| ADELAIDE | 345 kV | 9 | IDAHO POWER CO |
| BORAH | 345 kV | 7 | IDAHO POWER CO |
| GOSHEN | 345 kV | 4 | PACIFICORP |
| KINPORT | 345 kV | 8 | IDAHO POWER CO |
| MIDPOINT | 345 kV | 11 | IDAHO POWER CO |
| POPULUS | 345 kV | 8 | PACIFICORP |
| AMERICAN FALLS | 230 kV | 7 | IDAHO POWER CO |
| AMPS | 230 kV | 3 | PACIFICORP |
| ANTELOPE | 230 kV | 6 | PACIFICORP |
| BANCROFT | 230 kV | 3 | PACIFICORP |
| BENEWAH | 230 kV | 6 | AVISTA CORP |
| BOISE BENCH | 230 kV | 17 | IDAHO POWER CO |
| BOWMONT | 230 kV | 7 | IDAHO POWER CO |
| BRADY | 230 kV | 9 | IDAHO POWER CO |
| BROWNLEE | 230 kV | 15 | IDAHO POWER CO |
| CABINET GORGE | 230 kV | 5 | AVISTA CORP |
| CALDWELL | 230 kV | 10 | IDAHO POWER CO |
| GOSHEN | 230 kV | 16 | PACIFICORP |
| GRACE | 230 kV | 8 | PACIFICORP |
| HORSE FLAT | 230 kV | 3 | IDAHO POWER CO |
| HUNT | 230 kV | 6 | IDAHO POWER CO |
| LANCASTER | 230 kV | 3 | BONNEVILLE POWER ADMINISTRATION |
| LANGLEY | 230 kV | 5 | IDAHO POWER CO |
| LOCUSST | 230 kV | 5 | IDAHO POWER CO |
| LOLO | 230 kV | 7 | AVISTA CORP |
| LOST RIVER | 230 kV | 6 | BONNEVILLE POWER ADMINISTRATION |
| MALAD | 230 kV | 3 | PACIFICORP |
| MORA | 230 kV | 3 | IDAHO POWER CO |
| MOSCOW | 230 kV | 6 | AVISTA CORP |
| NAMPA | 230 kV | 5 | IDAHO POWER CO |
| NORTH LEWISTON | 230 kV | 8 | AVISTA CORP |
| PINE CREEK | 230 kV | 6 | AVISTA CORP |
| RATHDRUM | 230 kV | 10 | AVISTA CORP |
| RIGBY | 230 kV | 9 | PACIFICORP |
| ROUND VALLEY | 230 kV | 3 | BONNEVILLE POWER ADMINISTRATION |
| SODA POINT | 230 kV | 3 | PACIFICORP |
| SPAR CANYON | 230 kV | 5 | BONNEVILLE POWER ADMINISTRATION |
| SUNBEAM | 230 kV | 4 | PACIFICORP |
| SWAN FALLS | 230 kV | 3 | IDAHO POWER CO |
| BONNEVILLE | 161 kV | 3 | PACIFICORP |
| CINDER BUTTE | 161 kV | 2 | PACIFICORP |
| DEAD HEAD | 161 kV | 1 | IDAHO POWER CO |
| DRUMMOND | 161 kV | 5 | BONNEVILLE POWER ADMINISTRATION |
| FREMONT | 161 kV | 5 | IDAHO POWER CO |
| GEM | 161 kV | 2 | CITY OF IDAHO FALLS - (ID) |
| JEFFERSON | 161 kV | 7 | PACIFICORP |
| JOLLY HILL | 161 kV | 4 | PACIFICORP |
| SUGARLOAF | 161 kV | 6 | CITY OF IDAHO FALLS - (ID) |
| SWAN VALLEY | 161 kV | 4 | BONNEVILLE POWER ADMINISTRATION |
| WASHINGTON | 161 kV | 2 | CITY OF IDAHO FALLS - (ID) |
| WESTSIDE | 161 kV | 3 | PACIFICORP |
| WOLVERINE CREEK | 161 kV | 2 | PACIFICORP |
| YORK | 161 kV | 2 | CITY OF IDAHO FALLS - (ID) |
| ALAMEDA | 138 kV | 5 | IDAHO POWER CO |
| BANNOCK CREEK | 138 kV | 1 | IDAHO POWER CO |
Every named substation in Idaho
All 274 named substations, grouped by voltage band.
500 kV and above · 4
230–344 kV · 33
115–229 kV · 149
- BONNEVILLE
- CINDER BUTTE
- DEAD HEAD
- DRUMMOND
- FREMONT
- GEM
- JEFFERSON
- JOLLY HILL
- SUGARLOAF
- SWAN VALLEY
- WASHINGTON
- WESTSIDE
- WOLVERINE CREEK
- YORK
- ALAMEDA
- BANNOCK CREEK
- BETHEL COURT
- BLACKFOOT
- BOISE
- BRIDGE
- BURLEY
- CANAL
- CHESTNUT
- CINDER
- CLAWSON
- CLOVERDALE
- CRATER
- DEEN
- DON
- DUFFIN
- DWORSHAK NO.2
- EAGLE
- EAST HILLS
- EASTGATE
- ELK HORN
- EMMETT
- FELT
- FORT HALL
- FRANKLIN
- GAGA
- GLENNS FERRY
- GRACE
- HAILEY
- HAPPY VALLEY
- HAVEN
- HAY MILL
- HEYBURN
- HIGHLAND
- HILL
- HILLSDALE
- HOKU
- HUBBARD
- IDAHOME
- JEROME
- JULIAETTA
- KARCHER
- KETCHUM
- KIMBERLY
- KING
- KRAMER
- KUNA
- LAMB
- LANSING
- LAVA
- LINCOLN
- LINDEN
- MERIDIAN
- MIDROSE
- MINICO
- MOONSTONE
- MORELAND
- MOUNTAIN HOME
- NORTH BENCH
- NORTH MOSCOW
- OROFINO
- PACIFIC
- PAYETTE
- PINGREE
- PIONEER
- PLEASANT VALLEY
- PORTNEUF
- RAFT
- RIVERTON
- ROCKLAND
- ROE'S CORNER
- ROSS FORK
- SILVER
- SIMPLOT
- STAR
- STARKEY
- STATE
- STERLING
- STRIKER DAM
- SYPHON
- TABER
- TEN MILE
- TERRY
- TOPCAM
- TWIN FALLS
- TYHEE
- UNITY
- UPPER SALMON FALLS
- UPPER SALMON FALLS B
- USTICK
- VALLIVUE
- VICTORY
- WEISER
- WEST BURLEY
- WILIS
- WILLOW CREEK
- WOOD RIVER
- ZILOG
- AIKEN
- ALBENI FALLS
- ATHOL
- BIG GRASSY
- BONNERS FERRY
- BRINCKEN'S CORNER
- BRONX
- CATTLE CREEK
- DIXIE
- DOWER
- GREENTIMBER
- HUSTON
- LACLEDE
- LAVA
- MACKAY
- MACKS INN
- MERRILL
- MOYIE
- NORTH LEWISTON
- OLA
- PALISADES
- PINE STREET
- PLUMMER
- POTLATCH
- PRIEST RIVER
- SAMUELS
- SAND CREEK
- SANDPOINT
- SELLE
- SOUTH PARK
- SWEETWATER
- TARGHEE
- TARGHEE TAP
- TENDOY
- TENDOY 2
- TINCUP
- VICTOR
69–114 kV · 54
- AMMON
- APPLEWAY
- BELSON
- BLACK CANYON
- BLANCHARD
- BUCKHORN
- BUHL
- BUTLER
- COEUR D'ALENE 15TH STREET
- CRAIGMONT
- CRANE CREEK
- DEAD HEAD
- DEAD HEAD
- DEAD HEAD
- DEAD HEAD
- DESMET
- DOWNEY
- EAST GRANGEVILLE
- EGIN
- FILER
- FLAT TOP
- HAYDEN
- IDAHO FALLS
- JOPLIN
- KAMIAH
- KENYON WELL
- KOOSKIA
- LAKE
- MAP ROCK
- MELBA
- MENAN
- NEW PLYMOUNTH
- NEWCOMB
- NEWDALE
- PARMA
- PERRINE
- POCATELLO
- PRAIRIE
- RAYMOND
- REXBURG
- ROCKFORD
- SAND CREEK
- SANDERS
- SCARCELLO
- SHELLEY
- SILVERTON
- ST. ANTHONY
- SWEET
- THE RACK
- THOUSAND SPRINGS
- UCON
- UNDERGROUND
- UPPER MALAD
- WALLACE
below 69 kV · 23
voltage not recorded · 4
Frequently asked questions
How many electric substations are in Idaho?
HIFLD records 897 substations in Idaho, of which 274 carry a station name. That is the 17th-most named substations of any state in the dataset.
What is the highest-voltage substation in Idaho?
4 named substations in Idaho share the top voltage of 500 kV, including DWORSHAK, HATWAI, HEMINGWAY.
Which substation in Idaho connects the most transmission lines?
BOISE BENCH has the most connected transmission lines of the named substations listed here, with 17 at up to 230 kV.
How many substations in Idaho are 345 kV or higher?
11 of 274 named substations (4%) operate at 345 kV or above, compared with 8% nationally. Idaho ranks 37th of 50 states and DC for named substations at that level.
How many datacenter candidate sites in Idaho are at substations?
646 of the 2,171 scored candidate sites in Idaho are substation sites — locations generated at an existing substation. Scored sites across Idaho average 51.7 on the 0–100 DC Readiness scale, against 53 nationally.
Looking for a specific record? The directory lists every substation in Idaho, A to Z.
More on Idaho, 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 Idaho”, https://gridcensus.com/substations/idaho (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 Idaho 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.