CASTLETON
SubstationVermont · GREEN MOUNTAIN POWER CORP
At a glance
CASTLETON is an electric transmission substation in Vermont, on GREEN MOUNTAIN POWER CORP's transmission network. It is classified as distribution (<69 kv) and connects 1 transmission line. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #174536 | 46 kV | GREEN MOUNTAIN POWER CORP | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of CASTLETON, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| WEST RUTLAND | Substation-Adjacent | VT | Rutland County | 345 kV | 600 MW | 4.3 yrs | 68.9 |
| Rutland Landfill (Stafford Hill) | Brownfield | VT | Rutland | 46 kV | 2 MW | 4.3 yrs | 64.8 |
| NORTH RUTLAND | Substation-Adjacent | VT | Rutland County | 115 kV | 100 MW | 4.3 yrs | 63.7 |
| OZ Rutland | Greenfield | VT | Rutland | — | — | 4.3 yrs | 62.8 |
| UNKNOWN133349 | Substation-Adjacent | VT | Rutland County | 115 kV | 100 MW | 4.3 yrs | 62.6 |
| TAP136049 | Substation-Adjacent | VT | Rutland County | 115 kV | 100 MW | 4.3 yrs | 62.4 |
| BLISSVILLE | Substation-Adjacent | VT | Rutland County | 115 kV | 100 MW | 4.3 yrs | 61.8 |
| WHITEHALL | Substation-Adjacent | NY | Rutland County | 115 kV | 100 MW | 4.3 yrs | 58.4 |
How does CASTLETON compare with other substations in Vermont?
Vermont has 317 substation records in HIFLD, of which 131 carry a station name; the rest are unnamed tap points, risers and line ends. 60 named substations in the state are in CASTLETON's below 69 kV band (46% of named stations). 41 sit in a higher band. 5 named substations in Vermont operate at 345 kV or above. The highest voltage recorded in the state is 345 kV, and the state median is 46 kV.
Who owns the transmission lines at CASTLETON?
The 1 connected line listed above is owned by GREEN MOUNTAIN POWER CORP. Line voltages range from 46 kV to 46 kV. Their combined recorded length is about 0 miles.
How do candidate sites near CASTLETON score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 69 on the 0–100 DC Readiness scale. They fall in Rutland County, Rutland. The Vermont average across 758 scored sites is 54.3. 82 of those Vermont sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is CASTLETON substation?
CASTLETON has a maximum voltage of 46 kV. That places it in the below 69 kV band. The median named US substation in this dataset is 115 kV, so CASTLETON is below the national midpoint.
How many transmission lines connect to CASTLETON substation?
1 transmission line terminate at or pass through CASTLETON in the HIFLD line data. The connected lines listed here run at 46 kV. Together the listed lines cover about 0 miles.
Who owns CASTLETON substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at CASTLETON belong to GREEN MOUNTAIN POWER CORP. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is CASTLETON substation located?
CASTLETON is in Vermont at 43.6011, -73.1755. The datacenter candidate sites closest to it are in Rutland County, Rutland.
Are there datacenter candidate sites near CASTLETON substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of CASTLETON. The highest-scoring is WEST RUTLAND at 69/100. Across Vermont, the average DC Readiness score is 54.3.
Other 46 kV substations in Vermont
- BETHEL· 3 lines
- CAVENDISH· 3 lines
- MANCHESTER· 3 lines
- PLEASANT STREET· 3 lines
- WEYBRIDGE· 3 lines
- CHARLESTON· 2 lines
- HYDEVILLE· 2 lines
- LUDLOW ROUTE 103· 2 lines
- All named substations in Vermont· 131 stations
- Datacenter candidate sites in Vermont· 758 sites
- Brownfield and retired plant sites in Vermont
- Substations by state
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, “CASTLETON substation, Vermont”, https://gridcensus.com/substations/vermont/castleton-2005836c (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for CASTLETON substation, Vermont 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.