HEFFERLINE
SubstationOhio
At a glance
HEFFERLINE is an electric transmission substation in Ohio. It is classified as unclassified and connects 0 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
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HEFFERLINE, 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 |
|---|---|---|---|---|---|---|---|
| NORTH MEDINA | Substation-Adjacent | OH | Medina County | 345 kV | 600 MW | 5.2 yrs | 66.6 |
| STAR | Substation-Adjacent | OH | Summit County | 345 kV | 600 MW | 5.2 yrs | 66.4 |
| EC Near Wadsworth | Greenfield | OH | Medina | — | — | 5.2 yrs | 63.1 |
| EC Near Wadsworth | Greenfield | OH | Medina | — | — | 5.2 yrs | 63.0 |
| EC Near Morton Salt Rittman | Greenfield | OH | Wayne | — | — | 5.2 yrs | 62.9 |
| EC Near Wadsworth | Greenfield | OH | Medina | — | — | 5.2 yrs | 62.3 |
| TAP154026 | Substation-Adjacent | OH | Summit County | 138 kV | 100 MW | 5.2 yrs | 62.0 |
| WEST AKRON | Substation-Adjacent | OH | Summit County | 138 kV | 100 MW | 5.2 yrs | 61.9 |
How do candidate sites near HEFFERLINE score?
The 8 highest-scoring candidate sites within about 25 miles range from 62 to 67 on the 0–100 DC Readiness scale. They fall in Medina County, Summit County, Medina, Wayne. 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
How many transmission lines connect to HEFFERLINE substation?
0 transmission lines terminate at or pass through HEFFERLINE in the HIFLD line data.
Where is HEFFERLINE substation located?
HEFFERLINE is in Ohio at 40.7927, -82.0029. The datacenter candidate sites closest to it are in Medina County, Summit County, Medina.
Are there datacenter candidate sites near HEFFERLINE substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of HEFFERLINE. The highest-scoring is NORTH MEDINA at 67/100. 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, “HEFFERLINE substation, Ohio”, https://gridcensus.com/substations/ohio/hefferline-869756e5 (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 HEFFERLINE 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.