MARION
SubstationIowa · MIDAMERICAN ENERGY CO
MARION is an electric transmission substation in Iowa, operated by MIDAMERICAN ENERGY CO. It is classified as sub-transmission (115 kv) and connects 3 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 |
|---|---|---|---|---|
| #2582 | 115 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 3.2 mi |
| #17291 | 115 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 10.3 mi |
| #31435 | 115 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 5.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MARION, 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 |
|---|---|---|---|---|---|---|---|
| TIFFIN | Substation-Adjacent | IA | Johnson County | 345 kV | 600 MW | 1.4 yrs | 78.6 |
| ARNOLD | Substation-Adjacent | IA | Linn County | 345 kV | 600 MW | 1.4 yrs | 74.8 |
| UNKNOWN159106 | Substation-Adjacent | IA | Johnson County | 161 kV | 100 MW | 1.4 yrs | 74.4 |
| UNKNOWN132168 | Substation-Adjacent | IA | Johnson County | 161 kV | 100 MW | 1.4 yrs | 72.8 |
| UNKNOWN132111 | Substation-Adjacent | IA | Linn County | 161 kV | 100 MW | 1.4 yrs | 71.6 |
| UNKNOWN137652 | Substation-Adjacent | IA | Johnson County | 161 kV | 100 MW | 1.4 yrs | 71.6 |
| RISER137656 | Substation-Adjacent | IA | Johnson County | 161 kV | 100 MW | 1.4 yrs | 71.6 |
| UNKNOWN132106 | Substation-Adjacent | IA | Linn County | 115 kV | 100 MW | 1.4 yrs | 71.4 |
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 MARION 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.