ARROYO
SubstationWest Virginia · MONONGAHELA POWER CO
At a glance
ARROYO is an electric transmission substation in West Virginia, on MONONGAHELA POWER CO's transmission network. It is classified as unclassified and connects 4 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #108053 | — | MONONGAHELA POWER CO | IN SERVICE | 9.9 mi |
| #117049 | — | MONONGAHELA POWER CO | IN SERVICE | 2.2 mi |
| #138536 | — | MONONGAHELA POWER CO | IN SERVICE | 0.1 mi |
| #146090 | — | MONONGAHELA POWER CO | IN SERVICE | 2.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ARROYO, 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 |
|---|---|---|---|---|---|---|---|
| WYLIE RIDGE | Substation-Adjacent | WV | Hancock County | 500 kV | 1,000 MW | 3.0 yrs | 66.8 |
| CRESCENT | Substation-Adjacent | PA | Beaver County | 345 kV | 600 MW | 3.6 yrs | 64.0 |
| CLINTON | Substation-Adjacent | PA | Beaver County | 345 kV | 600 MW | 3.6 yrs | 63.7 |
| UNKNOWN136871 | Substation-Adjacent | OH | Hancock County | 345 kV | 600 MW | 5.2 yrs | 63.3 |
| EC Coal Mahoning County | Greenfield | OH | Mahoning County | — | — | 5.2 yrs | 63.3 |
| EC Coal Mahoning County | Greenfield | OH | Mahoning County | — | — | 5.2 yrs | 63.3 |
| UNKNOWN113592 | Substation-Adjacent | OH | Hancock County | 345 kV | 600 MW | 5.2 yrs | 63.2 |
| TIDD | Substation-Adjacent | OH | Brooke County | 345 kV | 600 MW | 5.2 yrs | 62.6 |
Who owns the transmission lines at ARROYO?
The 4 connected lines listed above are owned by MONONGAHELA POWER CO. Their combined recorded length is about 14.6 miles.
How do candidate sites near ARROYO score?
The 8 highest-scoring candidate sites within about 25 miles range from 63 to 67 on the 0–100 DC Readiness scale. They fall in Hancock County, Beaver County, Mahoning County, Brooke County. The West Virginia average across 3,734 scored sites is 52. 378 of those West Virginia sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to ARROYO substation?
4 transmission lines terminate at or pass through ARROYO in the HIFLD line data. Together the listed lines cover about 14.6 miles.
Who owns ARROYO substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at ARROYO belong to MONONGAHELA POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is ARROYO substation located?
ARROYO is in West Virginia at 40.5781, -80.6251. The datacenter candidate sites closest to it are in Hancock County, Beaver County, Mahoning County.
Are there datacenter candidate sites near ARROYO substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of ARROYO. The highest-scoring is WYLIE RIDGE at 67/100. Across West Virginia, the average DC Readiness score is 52.
More in West Virginia
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, “ARROYO substation, West Virginia”, https://gridcensus.com/substations/west-virginia/arroyo-49d690ac (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 ARROYO substation, West 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.