DON MARQUIS
SubstationOhio · AMERICAN ELECTRIC POWER CO., INC
DON MARQUIS is an electric transmission substation in Ohio, operated by AMERICAN ELECTRIC POWER CO., INC. It is classified as high-voltage (345 kv) and connects 6 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
Ownership & operation
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #11005 | 345 kV | AMERICAN ELECTRIC POWER CO., INC | IN SERVICE | 30.9 mi |
| #28463 | 345 kV | AMERICAN ELECTRIC POWER CO., INC | IN SERVICE | 0.2 mi |
| #31291 | 345 kV | OHIO POWER CO | IN SERVICE | 49.8 mi |
| #60793 | 345 kV | AMERICAN ELECTRIC POWER CO., INC | IN SERVICE | 32.0 mi |
| #20863 | 138 kV | OHIO POWER CO | IN SERVICE | 0.2 mi |
| #50544 | 138 kV | OHIO POWER CO | IN SERVICE | 0.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DON MARQUIS, 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 |
|---|---|---|---|---|---|---|---|
| TAP137802 | Substation-Adjacent | OH | Pike County | 345 kV | 600 MW | 3.2 yrs | 72.2 |
| DON MARQUIS 765 KV | Substation-Adjacent | OH | Pike County | 765 kV | 1,000 MW | 3.2 yrs | 72.1 |
| ATLANTA | Substation-Adjacent | OH | Highland County | 345 kV | 600 MW | 3.2 yrs | 70.8 |
| Greenfield (FLATLICK - MARYSVILLE) | Greenfield | OH | Hocking County | 765 kV | 1,000 MW | 3.2 yrs | 68.4 |
| TAP137356 | Substation-Adjacent | OH | Adams County | 345 kV | 600 MW | 3.2 yrs | 67.4 |
| DON MARQUIS | Substation-Adjacent | OH | Pike County | 345 kV | 600 MW | 3.2 yrs | 67.3 |
| TAP137806 | Substation-Adjacent | OH | Scioto County | 138 kV | 100 MW | 3.2 yrs | 67.2 |
| UNKNOWN137829 | Substation-Adjacent | OH | Pike County | 138 kV | 100 MW | 3.2 yrs | 66.9 |
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
This page shows a public slice of the GridCensus dataset for DON MARQUIS substation, Ohio. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.