SPP Datacenter Sites
Southwest Power Pool
At a glance
SPP coordinates the central plains. Among the windiest grids in North America, it offers some of the lowest energy prices and shortest queues — attractive for power-hungry, latency-tolerant workloads.
How does SPP compare with other grid regions?
By site count SPP is the 5th-largest of 9 regions GridCensus tracks, with 16,814 candidate sites. Its average DC Readiness of 53.2 is the 6th-highest of 9, above the 53.0 national average. The average interconnection-queue wait of 4.1 yrs is the 4th-shortest of 9. Sites here see an average queue depth of 48 projects at their nearest point of interconnection. Catalogued substation capacity near these sites sums to 748.9k MW, a theoretical aggregate rather than available headroom.
Which states and site types make up SPP?
Oklahoma (3,704 sites, 22%), Kansas (2,350 sites, 14%) and Nebraska (2,304 sites, 14%) hold the largest shares of the region's candidate sites. By type, substation-adjacent sites make up 35% (5,866; 26% nationally), federal excess sites make up 21% (3,604; 12% nationally) and industrial sites make up 20% (3,426; 24% nationally).
Member states
By site type
- Substation-Adjacent5,866
- Federal Excess3,604
- Industrial3,426
- Greenfield2,220
- Former Mine1,640
- Brownfield58
What are SPP sites strongest and weakest on?
SPP is strongest on speed to power, averaging 56.1 against a national average of 50.0; its weakest factor is water, at 57.9 versus 72.3 nationally. Each factor is scored 0–100, where higher is better (for water and hazard, higher means lower stress and lower risk).
Top 25 datacenter sites in SPP
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| HAWTHORNE | Substation-Adjacent | MO | Jackson County | 345 kV | 600 MW | 4.3 yrs | 70.2 |
| FORT CALHOUN | Substation-Adjacent | NE | Washington County | 345 kV | 600 MW | 4.3 yrs | 69.2 |
| Warren AFB Wind | Brownfield | WY | Laramie | 35 kV | 3 MW | 4.3 yrs | 69.1 |
| TONTITOWN | Substation-Adjacent | AR | Benton County | 345 kV | 600 MW | 4.3 yrs | 68.9 |
| UNKNOWN131651 | Substation-Adjacent | NE | Sarpy County | 345 kV | 600 MW | 4.3 yrs | 68.4 |
| BROOKLINE | Substation-Adjacent | MO | Greene County | 345 kV | 600 MW | 4.3 yrs | 68.4 |
| ELLENDALE | Substation-Adjacent | ND | Dickey County | 230 kV | 300 MW | 4.3 yrs | 68.2 |
| UNKNOWN131665 | Substation-Adjacent | NE | Sarpy County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
| UNKNOWN118392 | Substation-Adjacent | OK | Mayes County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
| OPPD BLONDO STREET | Substation-Adjacent | NE | Douglas County | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| CRAIG | Substation-Adjacent | KS | Johnson County | 345 kV | 600 MW | 4.3 yrs | 67.6 |
| UNKNOWN117601 | Substation-Adjacent | MO | Cass County | 345 kV | 600 MW | 4.3 yrs | 67.4 |
| EC Coal Sheridan County | Greenfield | WY | Sheridan County | — | — | 4.3 yrs | 67.3 |
| OZ Greene | Greenfield | MO | Greene | — | — | 4.3 yrs | 67.2 |
| ALKALI CREEK | Substation-Adjacent | MT | Yellowstone County | 230 kV | 300 MW | 1.1 yrs | 67.2 |
| UNKNOWN118616 | Substation-Adjacent | KS | Johnson County | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| UNKNOWN131937 | Substation-Adjacent | NE | Lancaster County | 345 kV | 600 MW | 4.3 yrs | 67.1 |
| SHOREY ROAD | Substation-Adjacent | MT | Yellowstone County | 230 kV | 300 MW | 1.1 yrs | 67.1 |
| UNKNOWN131751 | Substation-Adjacent | NE | Sarpy County | 345 kV | 600 MW | 4.3 yrs | 67.1 |
| EC Coal Sheridan County | Greenfield | WY | Sheridan County | — | — | 4.3 yrs | 67.1 |
| EC Near Grand Avenue | Greenfield | MO | Jackson | — | — | 4.3 yrs | 67.0 |
| WICHITA | Substation-Adjacent | KS | Sedgwick County | 345 kV | 600 MW | 4.3 yrs | 67.0 |
| TAFT | Substation-Adjacent | MT | Shoshone County | 500 kV | 1,000 MW | 1.1 yrs | 67.0 |
| UNKNOWN206586 | Substation-Adjacent | WY | Laramie County | 230 kV | 300 MW | 4.3 yrs | 67.0 |
| EC Coal Pennington County | Greenfield | SD | Pennington County | — | — | 4.3 yrs | 66.9 |
SPP FAQ
What is SPP?
Southwest Power Pool (SPP) SPP coordinates the central plains. Among the windiest grids in North America, it offers some of the lowest energy prices and shortest queues — attractive for power-hungry, latency-tolerant workloads.
How many datacenter sites are in the SPP region?
GridCensus catalogs 16,814 scored datacenter candidate sites in SPP, averaging 53.2/100 DC Readiness — 11% of all sites scored nationally.
What is the average interconnection-queue wait in SPP?
Candidate sites in SPP average a 4.1 yrs queue wait with an average queue depth of 48 projects, the 4th-shortest of 9 regions.
Which state has the most SPP datacenter sites?
Oklahoma has the most, with 3,704 scored sites (22% of the region), followed by Kansas with 2,350.
What is the highest-scoring datacenter site in SPP?
HAWTHORNE in Jackson County, Missouri scores 70.2/100, the highest DC Readiness Score in the region.
Other grid regions
Related rankings and tools
Dataset updated . Screening estimates derived from public data sources.
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “SPP datacenter candidate sites”, https://gridcensus.com/iso/spp (data as of November 12, 2026).
Go deeper than the public screen
Every site and score for SPP is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.