JOPPA STATION
SubstationIllinois
JOPPA STATION is an electric transmission substation in Illinois. It is classified as sub-transmission (138 kv) and connects 11 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
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of JOPPA 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 |
|---|---|---|---|---|---|---|---|
| SHAWNEE | Substation-Adjacent | KY | Massac County | 500 kV | 1,000 MW | 4.3 yrs | 71.4 |
| JOPPA 345 | Substation-Adjacent | IL | Massac County | 345 kV | 600 MW | 4.8 yrs | 65.5 |
| UNKNOWN155604 | Substation-Adjacent | KY | McCracken County | 161 kV | 100 MW | 3.9 yrs | 64.2 |
| EC Near Shawnee | Greenfield | KY | McCracken | — | — | 4.3 yrs | 64.0 |
| EC Near Shawnee | Greenfield | KY | McCracken | — | — | 4.3 yrs | 63.6 |
| UNKNOWN122858 | Substation-Adjacent | KY | McCracken County | 161 kV | 100 MW | 3.9 yrs | 63.4 |
| UNKNOWN122859 | Substation-Adjacent | KY | McCracken County | 161 kV | 100 MW | 3.9 yrs | 63.3 |
| C-35 (DOE) | Substation-Adjacent | KY | McCracken County | 161 kV | 100 MW | 3.9 yrs | 63.2 |
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 JOPPA STATION substation, Illinois 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.