EARLHAM
SubstationIowa
EARLHAM is an electric transmission substation in Iowa. It is classified as sub-transmission (138 kv) and connects 2 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 EARLHAM, 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 |
|---|---|---|---|---|---|---|---|
| GRIMES | Substation-Adjacent | IA | Dallas County | 345 kV | 600 MW | 2.8 yrs | 68.6 |
| BOONEVILLE | Substation-Adjacent | IA | Madison County | 345 kV | 600 MW | 2.8 yrs | 65.8 |
| Milwaukee & St. Paul Rail Yard Company Solar | Brownfield | IA | Dallas | 161 kV | 1 MW | 2.8 yrs | 65.5 |
| UNKNOWN137711 | Substation-Adjacent | IA | Dallas County | 161 kV | 100 MW | 2.8 yrs | 64.6 |
| UNKNOWN131367 | Substation-Adjacent | IA | Polk County | 161 kV | 100 MW | 2.8 yrs | 64.3 |
| UNKNOWN137710 | Substation-Adjacent | IA | Dallas County | 161 kV | 100 MW | 2.8 yrs | 64.1 |
| UNKNOWN132145 | Substation-Adjacent | IA | Dallas County | 161 kV | 100 MW | 2.8 yrs | 64.1 |
| MADISON COUNTY | Substation-Adjacent | IA | Madison County | 345 kV | 600 MW | 2.8 yrs | 63.4 |
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 EARLHAM substation, Iowa. 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.