DARLINGTON
SubstationIowa · AMERICAN TRANSMISSION CO
DARLINGTON is an electric transmission substation in Iowa, operated by AMERICAN TRANSMISSION CO. It is classified as sub-transmission (138 kv) and connects 1 transmission line. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #22799 | 138 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 18.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DARLINGTON, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN121920 | Substation-Adjacent | IL | Jo Daviess County | 161 kV | 100 MW | 1.4 yrs | 68.7 |
| DARLINGTON | Substation-Adjacent | WI | Lafayette County | 138 kV | 100 MW | 1.4 yrs | 66.5 |
| EDEN | Substation-Adjacent | WI | Iowa County | 138 kV | 100 MW | 1.4 yrs | 63.7 |
| UNKNOWN121924 | Substation-Adjacent | IL | Stephenson County | 138 kV | 100 MW | 2.2 yrs | 62.9 |
| ECOGROVE WIND LLC | Substation-Adjacent | IL | Stephenson County | 138 kV | 100 MW | 2.2 yrs | 62.8 |
| TAP136956 | Substation-Adjacent | IL | Stephenson County | 138 kV | 100 MW | 2.2 yrs | 62.6 |
| TAP137880 | Substation-Adjacent | IL | Stephenson County | 138 kV | 100 MW | 2.2 yrs | 62.2 |
| EC Near Argyle | Greenfield | WI | Lafayette | — | — | 1.4 yrs | 60.9 |
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 DARLINGTON 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.