ROCKPORT STATION
SubstationIllinois · SOUTHERN INDIANA GAS & ELEC CO
ROCKPORT STATION is an electric transmission substation in Illinois, operated by SOUTHERN INDIANA GAS & ELEC CO. It is classified as extra-high-voltage (765 kv+) and connects 4 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 |
|---|---|---|---|---|
| #1478 | 765 kV | — | IN SERVICE | 110.7 mi |
| #30159 | 765 kV | — | IN SERVICE | 97.0 mi |
| #64992 | 765 kV | SOUTHERN INDIANA GAS & ELEC CO | — | 0.5 mi |
| #15467 | 138 kV | SOUTHERN INDIANA GAS & ELEC CO | IN SERVICE | 1.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ROCKPORT STATION, 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 |
|---|---|---|---|---|---|---|---|
| ROCKPORT STATION | Substation-Adjacent | IN | Dubois County | 765 kV | 1,000 MW | 4.6 yrs | 72.9 |
| HE RAMSEY | Substation-Adjacent | IN | Dubois County | 345 kV | 600 MW | 4.6 yrs | 72.7 |
| DUFF | Substation-Adjacent | IN | Dubois County | 345 kV | 600 MW | 4.6 yrs | 70.9 |
| Greenfield (SULLIVAN - ROCKPORT STATION) | Greenfield | IN | Dubois County | 765 kV | 1,000 MW | 4.6 yrs | 69.0 |
| PETERSBURG STATION | Substation-Adjacent | IN | Martin County | 345 kV | 600 MW | 4.6 yrs | 68.8 |
| Greenfield (JEFFERSON - ROCKPORT STATION) | Greenfield | IN | Perry County | 765 kV | 1,000 MW | 4.6 yrs | 68.8 |
| Greenfield (JEFFERSON - ROCKPORT STATION) | Greenfield | IN | Spencer County | 765 kV | 1,000 MW | 4.6 yrs | 68.2 |
| Greenfield (SULLIVAN - ROCKPORT STATION) | Greenfield | IN | Spencer County | 765 kV | 1,000 MW | 4.6 yrs | 68.0 |
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 ROCKPORT STATION substation, Illinois. 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.