Iron Mountain MUM-3
- Planned critical IT
- 85 MW
- Updated
- Oct 28, 2026
Iron Mountain’s current MUM-3 overview and FAQ target Phase I opening in the first quarter of 2028, followed by additional phased releases. The page still contains an older 2027 delivery reference; the more specific Phase I forecast does not imply that all 85 MW will open at once. New 85 MW full-build facility/campus expansion; supersedes the earlier 32 MW/H2-2025 plan.
Program relationships
Capacity
Operating IT capacity: Not established in published records
A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.
Development
1 building
32 MW / H2 2025 historical plan.
1 building
Current 130,000 sqm AI-ready design.
Milestones (3)
Jun 14, 2023 · Event timing type not established
Cancelled · Announced
Source not linkedJan 2026 · Recorded actual event
Completed · Construction started
Source not linked2027 · Forecast / planned record
Forecast · Event type not stated
Source not linkedParticipants
Operator
Sources by role
Operator (1)
- Web Werks India joins Iron Mountain Data Centers · Mar 28, 2025 · Corroborating
Operator (1)
- India: your data center gateway to Asia · Primary
Other participants (1)
Contractor
Sources by role
Contractor (1)
- Iron Mountain breaks ground on 85 MW Mumbai data center · Jan 19, 2026 · Primary
Site & development
Additional project facts
Public-source research. Plans may change. See Evidence for sources and qualifications.
Related projects (2)
Operating · Navi Mumbai, Maharashtra, India
Shared participant: Iron Mountain Data Centers · Same market: Maharashtra, India
Compare in a collectionOperating · Navi Mumbai, Maharashtra, India
Shared participant: Iron Mountain Data Centers · Same market: Maharashtra, India
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