PHILO
SubstationOhio · OHIO POWER CO
At a glance
PHILO is an electric transmission substation in Ohio, on OHIO POWER CO's transmission network. It is classified as sub-transmission (138 kv) and connects 12 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 |
|---|---|---|---|---|
| #105065 | 138 kV | OHIO POWER CO | IN SERVICE | 41.1 mi |
| #107105 | 138 kV | OHIO POWER CO | IN SERVICE | 19.4 mi |
| #113905 | 138 kV | OHIO POWER CO | IN SERVICE | 5.9 mi |
| #118958 | 138 kV | OHIO POWER CO | IN SERVICE | 18.2 mi |
| #122104 | 138 kV | OHIO POWER CO | IN SERVICE | 49.5 mi |
| #124897 | 138 kV | OHIO POWER CO | IN SERVICE | 13.4 mi |
| #128914 | 138 kV | OHIO POWER CO | IN SERVICE | 18.5 mi |
| #132145 | 138 kV | OHIO POWER CO | IN SERVICE | 5.9 mi |
| #143961 | 138 kV | OHIO POWER CO | IN SERVICE | 19.4 mi |
| #144762 | 138 kV | OHIO POWER CO | IN SERVICE | 0.4 mi |
| #148601 | 138 kV | OHIO POWER CO | IN SERVICE | 12.4 mi |
| #148727 | 138 kV | OHIO POWER CO | IN SERVICE | 2.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of PHILO, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN113903 | Substation-Adjacent | OH | Morgan County | 345 kV | 600 MW | 5.2 yrs | 62.5 |
| MUSKINGUM RIVER | Substation-Adjacent | OH | Morgan County | 345 kV | 600 MW | 5.2 yrs | 62.5 |
| UNKNOWN113901 | Substation-Adjacent | OH | Morgan County | 345 kV | 600 MW | 5.2 yrs | 62.2 |
| OHIO CENTRAL | Substation-Adjacent | OH | Muskingum County | 345 kV | 600 MW | 5.2 yrs | 61.5 |
| CONESVILLE STATION | Substation-Adjacent | OH | Coshocton County | 345 kV | 600 MW | 5.2 yrs | 61.4 |
| EC Coal Guernsey County | Greenfield | OH | Guernsey County | — | — | 5.2 yrs | 60.5 |
| EC Coal Muskingum County | Greenfield | OH | Muskingum County | — | — | 5.2 yrs | 59.5 |
| EC Coal Morgan County | Greenfield | OH | Morgan County | — | — | 5.2 yrs | 59.4 |
How does PHILO compare with other substations in Ohio?
Ohio has 2,565 substation records in HIFLD, of which 465 carry a station name; the rest are unnamed tap points, risers and line ends. 189 named substations in the state are in PHILO's 115–229 kV band (41% of named stations). 60 sit in a higher band. 60 named substations in Ohio 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 PHILO?
The 12 connected lines listed above are owned by OHIO POWER CO. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 206.5 miles.
How do candidate sites near PHILO score?
The 8 highest-scoring candidate sites within about 25 miles range from 59 to 63 on the 0–100 DC Readiness scale. They fall in Morgan County, Muskingum County, Coshocton County, Guernsey County. The Ohio average across 3,933 scored sites is 54.8. 835 of those Ohio sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is PHILO substation?
PHILO 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 PHILO is above the national midpoint.
How many transmission lines connect to PHILO substation?
12 transmission lines terminate at or pass through PHILO in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 206.5 miles.
Who owns PHILO substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at PHILO belong to OHIO POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is PHILO substation located?
PHILO is in Ohio at 39.8652, -81.9037. The datacenter candidate sites closest to it are in Morgan County, Muskingum County, Coshocton County.
Are there datacenter candidate sites near PHILO substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of PHILO. The highest-scoring is UNKNOWN113903 at 63/100. Across Ohio, the average DC Readiness score is 54.8.
Other 138 kV substations in Ohio
- FOWLES· 18 lines
- IMPERIAL· 16 lines
- NELSON· 12 lines
- WAGENHALS· 11 lines
- HOWARD· 9 lines
- SOUTH CANTON 138KV· 9 lines
- SOUTH POINT· 9 lines
- SUMMERFIELD· 9 lines
- All named substations in Ohio· 465 stations
- Datacenter candidate sites in Ohio· 3,933 sites
- Brownfield and retired plant sites in Ohio
- 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, “PHILO substation, Ohio”, https://gridcensus.com/substations/ohio/philo-48e98647 (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 PHILO substation, Ohio 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.