Compass Datacenters IAD campus (Thunderball Drive)
approved CampusOperated by Compass Datacenters, LLC
Virginia DEQ issued Compass Datacenters, LLC an amended air permit (Registration No. 74160) on November 21, 2025 for emergency diesel engine gen-sets at its Leesburg data center campus on Thunderball Drive, superseding the permit dated January 20, 2023. The equipment list covers 75 previously permitted Cummins QSK60-G15 gen-sets rated 2,000 ekW each, originally permitted September 12, 2018, plus 5 newly permitted units of the same model and rating.
Land use jurisdiction: Town of Leesburg
Measurements on record
Approvals, by aspect
| Aspect | Approving body | Instrument | Status |
|---|---|---|---|
| Air permit (backup generators) | Virginia Department of Environmental Quality | Article 6 minor NSR permit (amended), Registration No. 74160 (2025-11-21) document |
on record |
| Land use entitlement (CUP / rezoning) | not yet requested | ||
| CEQA review | not yet requested | ||
| Building permit | not yet requested | ||
| Water supply (will-serve) | not yet requested | ||
| Wastewater / septic | not yet requested | ||
| Stormwater / retention ponds / dry wells | not yet requested | ||
| Grid interconnection | not yet requested | ||
| Natural gas supply | not yet requested | ||
| Tax abatement / development agreement | not yet requested |
Location and sources
Leesburg, Loudoun County, Virginia
Every record links to its source: openly licensed datasets (Epoch AI, CC BY; Wikidata, CC0; US EPA, public domain) and public permit records. Full sourcing and licensing: methodology · sources.