Amazon IAD-51 and IAD-56 Data Center Facility
Operating · 45220 Prologis Plaza, Sterling, VA
Amazon Data Services IAD-51 and IAD-56 are data centers at 45220 and 45210 Prologis Plaza in Sterling, Loudoun County, on an 18.7-acre parcel owned by Prologis. They share Virginia DEQ air permit 74063 with IAD-88, IAD-89, IAD-192 and IAD-214. The permit, amended July 7, 2026, covers twenty-two 2,750 kW Caterpillar 3516E generators with SCR alongside earlier 2,500 kW and 2,000 kW Caterpillar emergency units, and allows operation during ISO-declared emergencies.
Overview
- Exact-site power
- Not disclosed
- No exact-site MW figure in cited sources.
- Status
- Operating
- Operating facility
- IT floor area
- Not disclosed
- Facility
- Compute profile
- Hyperscale · Cloud
- Project scope
- IAD-51 and IAD-56 share a Virginia DEQ permit with IAD-88, IAD-89, IAD-192 and IAD-214. Their 18.7-acre Prologis-owned parcel carries four commercial building records; the first, DC8 at 45190 Prologis Plaza, is an 88,504 sq ft data center built in 2012.
Power and grid
- Backup generation
- Permit-wide: twenty-two Caterpillar 3516E emergency gen-sets of 2,750 kW with selective catalytic reduction, plus Caterpillar 3516C-HD units of 2,500 kW (including thirty-six permitted June 2, 2016) and sixteen 3516C units of 2,000 kW
- Grid flexibility
- The air permit lets the emergency gen-sets run during an ISO-declared emergency, including capacity deficiency conditions.
Facility and development
- Construction
- IAD-51 and IAD-56 share a Virginia DEQ permit with IAD-88, IAD-89, IAD-192 and IAD-214. Their 18.7-acre Prologis-owned parcel carries four commercial building records; the first, DC8 at 45190 Prologis Plaza, is an 88,504 sq ft data center built in 2012.
- Facility class
- Hyperscale · Cloud
- Air permits
- Virginia DEQ minor NSR permit, Registration No. 74063 (significant amendment July 7, 2026; permit May 28, 2024)
- Permits and dockets