Webster IC
BrownfieldWebster, Day, South Dakota · NorthWestern Energy - (SD)
Webster IC is a oil plant in Webster, Day, South Dakota, retired 2004-04-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 2 MW of generation, so the grid hookup, transmission rights, and often cooling-water access are already in place — collapsing the speed-to-power timeline versus a greenfield build.
Former use & capacity
Grid hookup & remediation
Nearby datacenter candidate sites
Scored candidate sites near Webster IC, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Grant County | 345 kV | 600 MW | 1.4 yrs | 68.2 |
| TAP159546 | Substation-Adjacent | SD | Day County | 115 kV | 100 MW | 1.0 yrs | 68.2 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 68.2 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 67.9 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 67.9 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 67.6 |
| TAP143494 | Substation-Adjacent | SD | Day County | 115 kV | 100 MW | 1.0 yrs | 67.6 |
| TAP159680 | Substation-Adjacent | SD | Day County | 115 kV | 100 MW | 1.0 yrs | 67.4 |
See all datacenter sites in South Dakota →
Dataset updated . Screening estimates derived from public data sources.
Brownfield attributes are derived from EIA retired-generator and EPA public data. Existing capacity reflects the retired plant's historical nameplate, not deliverable interconnection for a new load. Confirm reusable interconnection rights, remediation status, and site availability with the utility, ISO, and current owner.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Webster IC, Webster, Day, South Dakota. 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.