OTTUMWA GENERATION STATION
SubstationIowa · MIDAMERICAN ENERGY CO
OTTUMWA GENERATION STATION is an electric transmission substation in Iowa, operated by MIDAMERICAN ENERGY CO. It is classified as high-voltage (345 kv) and connects 7 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 |
|---|---|---|---|---|
| #21906 | 345 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 36.4 mi |
| #23048 | 161 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 41.5 mi |
| #12176 | 161 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 6.3 mi |
| #37436 | 161 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 18.9 mi |
| #44294 | 161 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 6.1 mi |
| #65125 | 161 kV | MIDAMERICAN ENERGY CO | — | 0.2 mi |
| #32849 | 161 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 16.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of OTTUMWA GENERATION 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 |
|---|---|---|---|---|---|---|---|
| OTTUMWA GENERATION STATION | Substation-Adjacent | IA | Wapello County | 345 kV | 600 MW | 1.4 yrs | 72.7 |
| UNKNOWN131612 | Substation-Adjacent | IA | Mahaska County | 161 kV | 100 MW | 1.4 yrs | 70.4 |
| MONTEZUMA SWITCHING STATION | Substation-Adjacent | IA | Keokuk County | 345 kV | 600 MW | 1.4 yrs | 69.0 |
| UNKNOWN137761 | Substation-Adjacent | IA | Mahaska County | 161 kV | 100 MW | 1.4 yrs | 68.9 |
| UNKNOWN168102 | Substation-Adjacent | IA | Mahaska County | 161 kV | 100 MW | 1.4 yrs | 67.7 |
| Greenfield (MONTEZUMA SWITCHING STATION - ) | Greenfield | IA | Mahaska County | 345 kV | 600 MW | 1.4 yrs | 67.4 |
| Greenfield (MONTEZUMA SWITCHING STATION - ) | Greenfield | IA | Mahaska County | 345 kV | 600 MW | 1.4 yrs | 67.0 |
| Greenfield (MONTEZUMA SWITCHING STATION - ) | Greenfield | IA | Mahaska County | 345 kV | 600 MW | 1.4 yrs | 66.7 |
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 OTTUMWA GENERATION STATION 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.