CyrusOne San Antonio IV Data Center — San Antonio, TX · Ask the Grid

Power and grid

Capacity	Basis	Status	Scope	As of
36 MW	Critical IT Load	Operating	SAT2-SAT4	—
CyrusOne reports 36 MW of total IT capacity for the SAT2-SAT4 campus; this is a campus-level figure and is not attributable solely to SAT4.
18 MW	Utility Service	Reported	SAT2-SAT4	—
CyrusOne describes an 18 MW distributed redundant power configuration for the SAT2-SAT4 campus. The source does not establish that this is SAT4-only or state whether it is utility service, energized capacity, or another capacity category.

Utility: CPS Energy
Balancing authority: ERCOT
ISO / RTO: ERCOT
Redundancy: Campus-level design includes an 18 MW distributed redundant power configuration, eight emergency generators with 48-hour full-load runtime, 16 UPS systems with 7-minute battery backup, and closed-loop chilled-water cooling with N+1 redundancy. These features are reported for the combined SAT2-SAT4 campus, not uniquely for SAT4.
Backup generation: Eight Detroit Diesel emergency generators with 48-hour runtime at full load. TCEQ records characterize the generators as emergency-only backup equipment, not prime or onsite generation.
Storage: Diesel belly tanks associated with the emergency generators; 16 UPS systems with 7-minute battery backup.
Power sources: CPS Energy utility electricity · Diesel emergency generators
Dockets: O4794

Facility and development

Construction: CyrusOne San Antonio IV (SAT4) is an operating facility at 9655 Raba Drive. Available evidence reports it as built in 2017; no exact-site construction start or completion date was identified. The operator's published 295,785 sq. ft. and 36 MW figures apply to the combined SAT2-SAT4 campus and are not allocated specifically to SAT4.
Facility class: Colocation · Cloud · Hyperscale · Enterprise · AI HPC
Workloads: high-performance computing (HPC) · cloud workloads · AI workloads · enterprise workloads · mission-critical workloads · high-density workloads · colocation deployments · hybrid- and multi-cloud deployments
Cooling systems: Water-free cooling systems across the SAT2-SAT4 campus · Closed-loop chilled-water cooling system with N+1 redundancy · Highly efficient chillers and variable-frequency drives · Energy-efficient CRAH units · Minimal water use for humidification and maintenance
Cooling medium: Closed-loop chilled water
Fiber and connectivity: Carrier-neutral facility with access to multiple network providers, regional and national fiber networks, low-latency Texas/U.S. connectivity, and cross-connect support for hybrid- and multi-cloud architectures.
Operating context: Operational CyrusOne SAT4 at 9655 Raba Drive, within the San Antonio SAT2-SAT4 campus. Public descriptions identify it as a purpose-built, customizable colocation facility supporting enterprise, cloud, hyperscale, HPC, and high-density deployments, with redundant power and cooling infrastructure and a 100% uptime service-level description. A public facility profile reports an 18 MW distributed redundant power configuration, but this is not treated as critical IT load.
Air permits: TCEQ Federal Operating Permit O4794 — initial issuance/Statement of Basis for the SAT2-SAT3-SAT4 site · TCEQ Permit by Rule registration 159252 under 30 TAC §106.511 for the SAT2-SAT3-SAT4 emergency generators
Emissions: The available authoritative air records cover the shared SAT2-SAT3-SAT4 site rather than SAT4 separately. The site uses diesel emergency generators for backup power, maintenance testing, and NSPS Subpart IIII compliance, with associated diesel belly tanks. TCEQ's Title V application establishes an aggregate federally enforceable NOx limit of 94.77 tons per year on a 12-month rolling basis; CO, VOC, PM/PM10/PM2.5, SO2, and HAP emissions are stated to remain below applicable PBR and major-source thresholds. The site is classified as a Title V major source because of the NOx threshold applicable after Bexar County's July 22, 2024 ozone reclassification.
Environmental commitments: The SAT2-SAT4 campus is designed with water-free cooling and minimal water use for humidification and maintenance. · CyrusOne's operator-wide commitment is climate neutrality by 2030, supported by efficiency improvements, new efficient facilities, and a shift toward carbon-free energy. · CyrusOne's operator-wide water strategy includes avoiding water-dependent cooling, pursuing net-positive water in high-water-stress regions, and restoring 20% more water than withdrawn for net-positive facilities. · CyrusOne's environmental priorities include climate, water, biodiversity, and circularity, including e-waste and other waste recycling.
Environmental impacts: Water-free cooling is intended to avoid evaporative cooling water consumption; the campus page nevertheless identifies minimal water use for humidification and maintenance. · The shared SAT2-SAT3-SAT4 air-permitted site has emergency-generator and diesel-belly-tank emissions sources. TCEQ identifies the site as a Title V major source because of the applicable NOx threshold after Bexar County's ozone reclassification. · TCEQ states that VOC and other criteria pollutants are intended to remain below Title V major-source thresholds apart from the site's NOx major-source status; the available records do not quantify impacts attributable to SAT4 alone.
Project cost (USD): 120,000,000
Tax abatements: City of San Antonio CyrusOne Reinvestment Zone tax abatement: 50% abatement of ad valorem taxes on qualifying real-property and personal-property improvements for six years; effective January 1, 2015 through December 31, 2020. The Texas Comptroller reports the abatement as expired, with a $3,103,390 base value and 15 new FTEs per year. · The 2013 City ordinance authorized the abatement for approximately $120 million of real and personal-property improvements and required at least 15 full-time employees at the property. The abatement did not apply to underlying land value, inventory, or supplies.
Permits and dockets: City of San Antonio Ordinance 2013-09-05-0608 approving the CyrusOne tax-abatement agreement. · City of San Antonio Ordinance 2013-09-05-0609 designating the CyrusOne Reinvestment Zone on a 14.574-acre site between Raba Drive and Portola Boulevard. · No exact-site building or environmental permit number for SAT4 at 9655 Raba Drive was identified in the reviewed permit records.
Public hearings: The San Antonio City Council held a public hearing on August 29, 2013, concerning designation of the CyrusOne Reinvestment Zone; the ordinance states that interested persons presented evidence and testimony for and against the designation. · The City Council passed the CyrusOne Reinvestment Zone ordinance on September 5, 2013. The official agenda describes the site as off Westover Hills Boulevard between Raba Drive and Portola Boulevard in Council District 6.
Community benefits: San Antonio approved a CyrusOne tax-abatement agreement for a $120 million project providing a 50% property-tax abatement for six years. · The City designated the CyrusOne Reinvestment Zone because the project was expected to support primary employment, attract major investment, and contribute to San Antonio’s economic development. · The operator reports water-free cooling, energy-efficient infrastructure, e-waste recycling, and advanced power management for the SAT2-SAT4 campus, which includes SAT4.
Petitions: No petition specifically concerning CyrusOne San Antonio IV/SAT4 at 9655 Raba Drive was identified in the reviewed official, local-news, or trade-news records.
Opposition or litigation: The 2013 ordinance records testimony from interested persons both for and against designation of the CyrusOne Reinvestment Zone, but it does not identify the speakers or describe unresolved opposition. · No site-specific litigation concerning CyrusOne San Antonio IV/SAT4 at 9655 Raba Drive was identified. The reported Vantage/VoltaGrid litigation concerns different projects and entities and is excluded from exact-asset opposition.

Identity and campus: CyrusOne San Antonio SAT2-SAT4
Also reported as SAT4, San Antonio IV (SAT4).
Regulatory record: CyrusOne received City of San Antonio approval in 2013 for a 14.574-acre CyrusOne Reinvestment Zone located between Raba Drive and Portola Boulevard, covering the development site associated with the SAT2-SAT4 campus. The approved project was a co-location data center with approximately $120 million in real and personal-property investment and 15 full-time jobs. The associated six-year tax abatement became effective January 1, 2015 and expired December 31, 2020. No authoritative exact-site building permit number, utility agreement, power-purchase agreement, tenant agreement, financing agreement, or land-purchase price was identified in the reviewed records.

CyrusOne San Antonio IV

CyrusOne San Antonio IV

Overview

CyrusOne San Antonio IV (SAT4)

Power and grid

Facility and development

Organizations

Sources

Explore related directories

Explore related directories