TAP138518
SubstationIowa · UNION ELECTRIC CO - (MO)
TAP138518 is an electric transmission substation in Iowa, operated by UNION ELECTRIC CO - (MO). It is classified as sub-transmission (138 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 |
|---|---|---|---|---|
| #2137 | 161 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 15.4 mi |
| #6944 | 161 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 2.5 mi |
| #39814 | 161 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 8.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP138518, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN133904 | Substation-Adjacent | IL | Hancock County | 161 kV | 100 MW | 1.4 yrs | 66.8 |
| UNKNOWN132660 | Substation-Adjacent | IL | Hancock County | 161 kV | 100 MW | 1.4 yrs | 66.7 |
| VIELE | Substation-Adjacent | IA | Lee County | 161 kV | 100 MW | 1.4 yrs | 66.0 |
| BURLINGTON (IA) | Substation-Adjacent | IA | Des Moines County | 161 kV | 100 MW | 1.4 yrs | 65.6 |
| Greenfield (TAP140530 - SUB T) | Greenfield | IA | Henry County | 345 kV | 600 MW | 1.4 yrs | 64.9 |
| EAST QUINCY | Substation-Adjacent | IL | Hancock County | 138 kV | 100 MW | 1.4 yrs | 64.8 |
| Greenfield (TAP140530 - SUB T) | Greenfield | MO | Clark County | 345 kV | 600 MW | 1.4 yrs | 64.1 |
| Greenfield (TAP140530 - SUB T) | Greenfield | MO | Clark County | 345 kV | 600 MW | 1.4 yrs | 63.9 |
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 TAP138518 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.