SOUTH MILLERSBURG
SubstationOhio · OHIO POWER CO
At a glance
SOUTH MILLERSBURG is an electric transmission substation in Ohio, on OHIO POWER CO's transmission network. It is classified as sub-transmission (138 kv) and connects 2 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 |
|---|---|---|---|---|
| #101099 | 138 kV | OHIO POWER CO | IN SERVICE | 14.9 mi |
| #104082 | 138 kV | OHIO POWER CO | IN SERVICE | 3.7 mi |
| #400137 | 69 kV | AEP | IN SERVICE | 2.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SOUTH MILLERSBURG, 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 |
|---|---|---|---|---|---|---|---|
| CONESVILLE STATION | Substation-Adjacent | OH | Coshocton County | 345 kV | 600 MW | 5.2 yrs | 61.4 |
| EC Near Morton Salt Rittman | Greenfield | OH | Wayne | — | — | 5.2 yrs | 61.0 |
| EC Coal Stark County | Greenfield | OH | Stark County | — | — | 5.2 yrs | 60.6 |
| UNKNOWN113658 | Substation-Adjacent | OH | Stark County | 138 kV | 100 MW | 5.2 yrs | 60.5 |
| EC Coal Tuscarawas County | Greenfield | OH | Tuscarawas County | — | — | 5.2 yrs | 60.5 |
| EC Near Morton Salt Rittman | Greenfield | OH | Wayne | — | — | 5.2 yrs | 60.5 |
| EC Coal Wayne County | Greenfield | OH | Wayne County | — | — | 5.2 yrs | 59.9 |
| EC Near Morton Salt Rittman | Greenfield | OH | Wayne | — | — | 5.2 yrs | 59.9 |
How does SOUTH MILLERSBURG 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 SOUTH MILLERSBURG'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 SOUTH MILLERSBURG?
The 3 connected lines listed above are owned by OHIO POWER CO, AEP. Line voltages range from 69 kV to 138 kV. Their combined recorded length is about 21.3 miles.
How do candidate sites near SOUTH MILLERSBURG score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 61 on the 0–100 DC Readiness scale. They fall in Coshocton County, Wayne, Stark County, Tuscarawas 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 SOUTH MILLERSBURG substation?
SOUTH MILLERSBURG 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 SOUTH MILLERSBURG is above the national midpoint.
How many transmission lines connect to SOUTH MILLERSBURG substation?
2 transmission lines terminate at or pass through SOUTH MILLERSBURG in the HIFLD line data. The connected lines listed here run at 138 kV, 69 kV. Together the listed lines cover about 21.3 miles.
Who owns SOUTH MILLERSBURG substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at SOUTH MILLERSBURG belong to OHIO POWER CO, and others to AEP. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is SOUTH MILLERSBURG substation located?
SOUTH MILLERSBURG is in Ohio at 40.5122, -81.9278. The datacenter candidate sites closest to it are in Coshocton County, Wayne, Stark County.
Are there datacenter candidate sites near SOUTH MILLERSBURG substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of SOUTH MILLERSBURG. The highest-scoring is CONESVILLE STATION at 61/100. Across Ohio, the average DC Readiness score is 54.8.
Other 138 kV substations in Ohio
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, “SOUTH MILLERSBURG substation, Ohio”, https://gridcensus.com/substations/ohio/south-millersburg-1251ba28 (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 SOUTH MILLERSBURG 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.