COLBY
SubstationIowa · ITC
COLBY is an electric transmission substation in Iowa, operated by ITC. It is classified as sub-transmission (138 kv) and connects 5 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #9101 | 161 kV | — | IN SERVICE | 7.2 mi |
| #9107 | 161 kV | — | IN SERVICE | 11.8 mi |
| #10709 | 161 kV | — | IN SERVICE | 4.7 mi |
| #10735 | 161 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 4.9 mi |
| #13609 | 161 kV | ITC | IN SERVICE | 11.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of COLBY, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN138092 | Substation-Adjacent | IA | Worth County | 161 kV | 100 MW | 1.4 yrs | 74.3 |
| UNKNOWN130590 | Substation-Adjacent | IA | Cerro Gordo County | 161 kV | 100 MW | 1.4 yrs | 74.3 |
| UNKNOWN133291 | Substation-Adjacent | MN | Freeborn County | 161 kV | 100 MW | 1.4 yrs | 74.1 |
| UNKNOWN173443 | Substation-Adjacent | IA | Cerro Gordo County | 161 kV | 100 MW | 1.4 yrs | 73.6 |
| UNKNOWN130513 | Substation-Adjacent | IA | Cerro Gordo County | 161 kV | 100 MW | 1.4 yrs | 73.5 |
| UNKNOWN133291 | Substation-Adjacent | IA | Worth County | 161 kV | 100 MW | 1.4 yrs | 72.7 |
| TAP173444 | Substation-Adjacent | IA | Cerro Gordo County | 161 kV | 100 MW | 1.4 yrs | 72.0 |
| UNKNOWN129404 | Substation-Adjacent | IA | Worth County | 161 kV | 100 MW | 1.4 yrs | 71.9 |
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 COLBY 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.