TAP136903
SubstationOhio
At a glance
TAP136903 is an electric transmission substation in Ohio. It is classified as sub-transmission (138 kv) and connects 3 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 |
|---|---|---|---|---|
| #113027 | 138 kV | — | IN SERVICE | 0.0 mi |
| #120389 | 138 kV | — | IN SERVICE | 10.6 mi |
| #129721 | 138 kV | — | IN SERVICE | 11.9 mi |
| #130017 | 138 kV | — | IN SERVICE | 5.9 mi |
| #137952 | 138 kV | — | IN SERVICE | 5.9 mi |
| #141443 | 138 kV | — | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP136903, 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 |
|---|---|---|---|---|---|---|---|
| TAP136893 | Substation-Adjacent | OH | Ashtabula County | 345 kV | 600 MW | 5.2 yrs | 63.1 |
| UNKNOWN113675 | Substation-Adjacent | OH | Ashtabula County | 345 kV | 600 MW | 5.2 yrs | 63.1 |
| ERIE WEST | Substation-Adjacent | PA | Ashtabula County | 345 kV | 600 MW | 3.6 yrs | 61.2 |
| OZ Ashtabula | Greenfield | OH | Ashtabula | — | — | 5.2 yrs | 60.7 |
| EC Coal Ashtabula County | Greenfield | OH | Ashtabula County | — | — | 5.2 yrs | 58.4 |
| UNKNOWN116065 | Substation-Adjacent | OH | Ashtabula County | 138 kV | 100 MW | 5.2 yrs | 57.2 |
| UNKNOWN113676 | Substation-Adjacent | OH | Ashtabula County | 138 kV | 100 MW | 5.2 yrs | 57.1 |
| UNKNOWN113753 | Substation-Adjacent | OH | Ashtabula County | 138 kV | 100 MW | 5.2 yrs | 57.1 |
How do candidate sites near TAP136903 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 63 on the 0–100 DC Readiness scale. They fall in Ashtabula County, Ashtabula. 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 TAP136903 substation?
TAP136903 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 TAP136903 is above the national midpoint.
How many transmission lines connect to TAP136903 substation?
3 transmission lines terminate at or pass through TAP136903 in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 34.3 miles.
Where is TAP136903 substation located?
TAP136903 is in Ohio at 41.9082, -80.5726. The datacenter candidate sites closest to it are in Ashtabula County, Ashtabula.
Are there datacenter candidate sites near TAP136903 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP136903. The highest-scoring is TAP136893 at 63/100. Across Ohio, the average DC Readiness score is 54.8.
More 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, “TAP136903 substation, Ohio”, https://gridcensus.com/substations/ohio/tap136903-a6ac0340 (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 TAP136903 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.