SOUTH FOND DE LAC
SubstationWisconsin · AMERICAN TRANSMISSION CO
SOUTH FOND DE LAC is an electric transmission substation in Wisconsin, operated by AMERICAN TRANSMISSION 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 |
|---|---|---|---|---|
| #21254 | 345 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 40.3 mi |
| #45617 | 345 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 54.8 mi |
| #3271 | 345 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 21.8 mi |
| #46064 | 138 kV | — | — | 0.1 mi |
| #35608 | 138 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 5.4 mi |
| #19130 | 138 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 7.8 mi |
| #44860 | 138 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 5.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SOUTH FOND DE LAC, 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 |
|---|---|---|---|---|---|---|---|
| FOREST JUNCTION | Substation-Adjacent | WI | Calumet County | 345 kV | 600 MW | 1.4 yrs | 74.7 |
| FITZGERALD | Substation-Adjacent | WI | Winnebago County | 345 kV | 600 MW | 1.4 yrs | 72.3 |
| MARTIN ROAD | Substation-Adjacent | WI | Fond du Lac County | 138 kV | 100 MW | 1.4 yrs | 72.0 |
| CYPRESS | Substation-Adjacent | WI | Calumet County | 345 kV | 600 MW | 1.4 yrs | 71.5 |
| ELLINWOOD | Substation-Adjacent | WI | Winnebago County | 138 kV | 100 MW | 1.4 yrs | 71.1 |
| SOUTH FOND DE LAC | Substation-Adjacent | WI | Fond du Lac County | 345 kV | 600 MW | 1.4 yrs | 70.5 |
| RIENZI | Substation-Adjacent | WI | Fond du Lac County | 138 kV | 100 MW | 1.4 yrs | 69.2 |
| Greenfield (SOUTH FOND DE LAC - FITZGERALD) | Greenfield | WI | Fond du Lac County | 345 kV | 600 MW | 1.4 yrs | 69.0 |
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 SOUTH FOND DE LAC substation, Wisconsin. 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.