GLEN LYN
SubstationVirginia · APPALACHIAN POWER CO
At a glance
GLEN LYN is an electric transmission substation in Virginia, on APPALACHIAN POWER CO's transmission network. It is classified as sub-transmission (138 kv) and connects 11 transmission lines. 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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #100620 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 22.3 mi |
| #103097 | 138 kV | GLEN LYN | — | 6.9 mi |
| #107402 | 138 kV | APPALACHIAN POWER CO | — | 0.1 mi |
| #108827 | 138 kV | GLEN LYN | IN SERVICE | 0.3 mi |
| #114680 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 21.1 mi |
| #125565 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 20.3 mi |
| #129358 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 7.8 mi |
| #129935 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 31.4 mi |
| #135109 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 20.3 mi |
| #140670 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 51.3 mi |
| #144351 | 138 kV | APPALACHIAN POWER CO | IN SERVICE | 10.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of GLEN LYN, 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 |
|---|---|---|---|---|---|---|---|
| OZ Mercer | Greenfield | WV | Mercer | — | — | 3.0 yrs | 60.3 |
| EC Coal Mercer County | Greenfield | WV | Mercer County | — | — | 3.0 yrs | 59.7 |
| EC Coal Raleigh County | Greenfield | WV | Raleigh County | — | — | 3.0 yrs | 59.6 |
| EC Coal Raleigh County | Greenfield | WV | Raleigh County | — | — | 3.0 yrs | 59.4 |
| OZ Mercer | Greenfield | WV | Mercer | — | — | 3.0 yrs | 58.1 |
| TAP154211 | Substation-Adjacent | VA | Giles County | 138 kV | 100 MW | 5.1 yrs | 57.4 |
| EC Near Radford Army Ammunition Plant | Greenfield | VA | Montgomery | — | — | 5.1 yrs | 57.2 |
| AFFINITY | Substation-Adjacent | WV | Raleigh County | 138 kV | 100 MW | 3.0 yrs | 57.0 |
How does GLEN LYN compare with other substations in Virginia?
Virginia has 1,382 substation records in HIFLD, of which 529 carry a station name; the rest are unnamed tap points, risers and line ends. 238 named substations in the state are in GLEN LYN's 115–229 kV band (45% of named stations). 212 sit in a higher band. 39 named substations in Virginia operate at 345 kV or above. The highest voltage recorded in the state is 765 kV, and the state median is 138 kV.
Who owns the transmission lines at GLEN LYN?
The 11 connected lines listed above are owned by APPALACHIAN POWER CO, GLEN LYN. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 192 miles.
How do candidate sites near GLEN LYN score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 60 on the 0–100 DC Readiness scale. They fall in Mercer, Mercer County, Raleigh County, Giles County. The Virginia average across 5,871 scored sites is 52.6. 733 of those Virginia sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is GLEN LYN substation?
GLEN LYN has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so GLEN LYN is above the national midpoint.
How many transmission lines connect to GLEN LYN substation?
11 transmission lines terminate at or pass through GLEN LYN in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 192 miles.
Who owns GLEN LYN substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at GLEN LYN belong to APPALACHIAN POWER CO, and others to GLEN LYN. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is GLEN LYN substation located?
GLEN LYN is in Virginia at 37.3697, -80.8613. The datacenter candidate sites closest to it are in Mercer, Mercer County, Raleigh County.
Are there datacenter candidate sites near GLEN LYN substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of GLEN LYN. The highest-scoring is OZ Mercer at 60/100. Across Virginia, the average DC Readiness score is 52.6.
Other 138 kV substations in Virginia
- CLINCH RIVER· 13 lines
- FIELDALE· 11 lines
- DANVILLE· 10 lines
- REUSENS· 10 lines
- SALTVILLE· 10 lines
- HANCOCK· 8 lines
- NORTH BRISTOL· 8 lines
- ROANOKE· 8 lines
- All named substations in Virginia· 529 stations
- Datacenter candidate sites in Virginia· 5,871 sites
- Brownfield and retired plant sites in Virginia
- 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, “GLEN LYN substation, Virginia”, https://gridcensus.com/substations/virginia/glen-lyn-3a81229f (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 GLEN LYN substation, Virginia 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.