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Microsoft Project Osmium

OperatingAI campusCampusCumming, Warren County, Iowa
70% profile completeness
45 claims from 11 sources
Current facility power
228 MW[1]
Likelyestimated
Planned capacity
Not yet sourced
Floor area
Not yet sourced
Buildings (planned)
4[1]
Likelyderived
Capital cost / investment
$7.2B[1]
Likelyestimated
First operational
Jan 1, 2021[1]
Likelyderived

POWER & GRID

Time-to-power · verification · interconnection
Time to power
Energized — operating
High confidence
Project verification
Verified operating
Operation documented by satellite imagery.
Current stage
Operational
Furthest stage with documented evidence
Utility · ISO
MidAmerican Energy · MISO
Substation: On-site substation

Power reality

Announced
No record
Interconnection request
No record
Contracted / approved
No record
Under construction
No record
Operational
228 MW[1]
Estimated from buildings observed operational
AI evidence brief
Summarizes only the evidence on this page. Answers citing anything else are rejected automatically.

Project verification

Development
  1. Announcedimplied by a later stage
  2. Land acquiredimplied by a later stage
  3. Planning / zoningimplied by a later stage
  4. Permittingimplied by a later stage
Grid interconnection
  1. Interconnection application
  2. Feasibility study
  3. System impact study
  4. Facilities study
  5. Interconnection agreement / service contract
Build & energization
  1. Financing
  2. Under constructionDec 18, 2018
    Model estimate · Satellite imagery
    • Dec 18, 2018 · Reported status: under construction[1]
    • Dec 18, 2018 · Construction start[1]
    • Dec 18, 2018 · Land clearing begins on the north part of the site[1]
    • Jan 1, 2021 · Reported status: expanding[1]
  3. EnergizationJan 1, 2021
    Satellite imagery
    • Jan 1, 2021 · Building 1 and 1st building on the site are operational. Foundation work begins on Building 2[1]
    • Jun 30, 2023 · Building 2 is operational. Estimated based on Microsoft H100 count 2023[1]
    • Mar 1, 2025 · Building 3-4 operational, no visible construction.[1]
  4. OperationalJan 1, 2021
    Satellite imagery
    • Jan 1, 2021 · Building 1 and 1st building on the site are operational. Foundation work begins on Building 2[1]
    • Jun 30, 2023 · Building 2 is operational. Estimated based on Microsoft H100 count 2023[1]
    • Mar 1, 2025 · Building 3-4 operational, no visible construction.[1]

● documented · ◌ implied by a later stage · ○ no evidence found. Dates are those of the earliest dated evidence, which can be later than when a stage actually began. Evidence classes: Model estimate, Satellite imagery.

Grid path

  1. facility
    Microsoft Project Osmium
  2. substation
    On-site substation[1]
    Satellite imageryLikely
    1 substation outline traced inside the campus on satellite imagery
  3. transmission
    161 kV line[5]
    Proximity onlyUnverified
    Highest-voltage line mapped within 2 km (0.26 km away). Not confirmed as the supply path.
  4. utility
    MidAmerican Energy[2]
    Service territoryLikely
    Retail service territory containing the site
  5. ISO / RTO
    MISO[4]
    Service territoryLikely
    Balancing authority: MISO
Substation capacity:
not published
Required upgrades:
not yet sourced
Congestion:
not yet sourced (no nodal price data)

Dashed boxes are based on proximity only and do not establish which asset serves the site.

Interconnection records

No interconnection-queue record is linked to this site. Of the ISOs we ingest, only NYISO publishes large-load requests; PJM, ERCOT, MISO, SPP and CAISO queues list generation only.

On-site & dedicated generation

No on-site, behind-the-meter or dedicated generation found in sources.

Location & imagery

Mapped outline
Coordinates
41.49637, -93.78742
Address
5855 SW Kerry St, Cumming, IA 50061[1]Likely
County
Warren County
Photographs

No openly licensed ground-level photos matched to this site yet.

Ownership, operation & customers

  1. 1. Property owner of record
    Not identified
  2. 2. Owner / developer
    Microsoft[1]
  3. 3. Operator
    Not identified
  4. 4. Tenant / cloud
    Not identified
  5. 5. End customer / workload
    OpenAI[1]Speculative
Power supply
Utility:
MidAmerican Energy[2]Unverified

Each link is sourced separately. The property owner of record is often a special-purpose entity; the same company appearing in two roles is shown only when sources say so.

All parties with evidence
Owner
Microsoft[1]Confirmed
End user
OpenAI[1]Speculative
Utility
MidAmerican Energy[2]Unverified

Most likely retail provider among 2 overlapping service territories (largest retail sales; territory polygons are approximate). Also overlapping: Clarke Electric Coop INC - (Ia).

Power (all fields)

Current facility power
228 MW[1]Likelyestimated

Estimated total facility power (IT plus cooling and overhead) at the latest observed milestone.

Current IT capacity
190 MW[1]Likelyestimated

Estimated IT load currently online, based on buildings observed operational.

Estimated annual consumption
1,398 GWh/yr[3]Speculativeestimated

228 MW × 8,760 h × 70% utilization.

Planned capacity
Not yet sourced

Capacity figures are nameplate or contracted; annual consumption is a labeled model estimate, not metered data.

Grid & electricity

ISO / RTO
MISO[4]Likelyderived

Location falls inside this ISO/RTO footprint.

Balancing authority
MISO[2]Likelyderived

Control area of the containing utility territory.

Nearest mapped substation
Microsoft Project Osmium Data Center (161 kV)[5]Likelyderived

Nearest substation mapped in OpenStreetMap; proximity does not establish which substation serves the site.

Distance to substation
0.6 km[5]Likelyderived
Highest-voltage line nearby
161 kV[5]Likelyderived

Highest-voltage transmission line mapped within 2 km.

State avg. industrial price
9.99¢/kWh[6]Confirmed

Iowa statewide average, July 2026.

State avg. commercial price
13.27¢/kWh[6]Confirmed

Iowa statewide average, July 2026.

Generation within 50 km
1.46 GW[7]Confirmedderived

18 EIA-reported plants within 50 km.

Interconnection status
Not yet sourced
Contracted / committed power
Not yet sourced
Nearby infrastructureTypeDistanceVoltage / capacitySource
161 kV line · MidAmerican EnergyTransmission line0.26 km161 kV[5]
River Hills · MidAmerican Energy CoPower plant (Natural Gas)17.4 km113 MW[7]
Sycamore (Ia) · MidAmerican Energy CoPower plant (Natural Gas)21.6 km141 MW[7]
Greater Des Moines · MidAmerican Energy CoPower plant (Natural Gas)22.6 km504 MW[7]
Pleasant Hill · MidAmerican Energy CoPower plant (Natural Gas)22.9 km154 MW[7]
Indianola · Indianola Municipal UtilitiesPower plant (Petroleum)24.1 km42 MW[7]
Arbor Hill Solar · MidAmerican Energy CoPower plant (Solar)39.7 km24 MW[7]
Arbor Hill Wind Farm · MidAmerican Energy CoPower plant (Wind)40.8 km310 MW[7]
Macksburg Wind Project · MidAmerican Energy CoPower plant (Wind)41.4 km120 MW[7]
Microsoft Project Osmium Data Center · MidAmerican EnergySubstation0.55 km161 kV[5]

Utility, ISO and nearby assets are derived from the site's location. Proximity to a substation or line doesn't establish the interconnection; that needs a utility filing or interconnection-queue record. Queue requests are applications, not commitments — most never reach operation.

Construction & permitting

  1. Announced
    —
  2. Land acquired
    —
  3. Permitting
    —
  4. Construction start
    Dec 18, 2018[1]
  5. First operational
    Jan 1, 2021[1]
  6. Expected completion
    —
Buildings (planned)
4[1]Likelyderived

Count of building outlines traced on satellite imagery.

Buildings operational
4[1]Likelyestimated
PhaseStatusAdded MWCompleted / expectedSource
Building 1operational57 MWJan 1, 2021[1]
Building 2operational57 MWJun 30, 2023[1]
Buildings 3–4operational114 MWMar 1, 2025[1]

Real estate

Official assessments
Assessor's value for a tax year

None sourced yet

Recorded transactions
Sale prices from recorded deeds

None sourced yet

Model estimates
Our model — not an appraisal

None sourced yet

Capital cost / investment
$7.2B[1]Likelyestimated

Modeled total capital cost (2025 USD) of capacity currently operational, incl. compute hardware.

Annual property tax
Not yet sourced

No county parcel or assessor records linked yet. County records are currently ingested for Loudoun County, VA and Maricopa County, AZ.

Size

Floor area
Not yet sourced

Compute

Chip types
A100, H100, B200[1]Confirmed
Compute (H100-equivalents)
155,600[1]Likelyestimated

What changed (last 3 years)

Follow this facility (RSS)
  • Current IT capacity
    95 MWJun 30, 2023[1]→190 MWMar 1, 2025[1]
  • Current facility power
    114 MWJun 30, 2023[1]→228 MWMar 1, 2025[1]
  • Buildings operational
    2Jun 30, 2023[1]→4Mar 1, 2025[1]
  • Status
    Operating + expandingJan 1, 2021[1]→OperatingJun 16, 2026[1]

Timeline

Construction start: Dec 18, 2018[1]
First operational: Jan 1, 2021[1]
  1. Dec 18, 2018[1]

    Land clearing begins on the north part of the site

  2. Jan 1, 202157 MW facility power· 1 buildings operational[1]

    Building 1 and 1st building on the site are operational. Foundation work begins on Building 2

  3. Jun 30, 2023114 MW facility power· 2 buildings operational[1]

    Building 2 is operational. Estimated based on Microsoft H100 count 2023

  4. Mar 1, 2025228 MW facility power· 4 buildings operational[1]

    Building 3-4 operational, no visible construction.

  5. Oct 8, 2025228 MW facility power· 4 buildings operational[1]

    Site already complete.

  6. Jun 16, 2026228 MW facility power· 4 buildings operational[1]

    No notable changes since October.

Buildings on this campus

5
  • MicrosoftOperating · 239,500 sq ft footprint
  • MicrosoftOperating · 243,900 sq ft footprint
  • MicrosoftOperating · 242,500 sq ft footprint
  • MicrosoftOperating · 247,400 sq ft footprint
  • MicrosoftOperating · 247,400 sq ft footprint

All claims (provenance audit)

45
FieldValueSourceConfidenceAs ofStatus
NameMicrosoft Project Osmium[1] Likely2026-06-16Shown
StatusUnder construction[1] derivedLikely2018-12-18Superseded / alternative
StatusOperating + expanding[1] derivedLikely2021-01-01Superseded / alternative
StatusOperating + expanding[1] derivedLikely2023-06-30Superseded / alternative
StatusOperating + expanding[1] derivedLikely2025-03-01Superseded / alternative
StatusOperating + expanding[1] derivedLikely2025-10-08Superseded / alternative
StatusOperating[1] derivedLikely2026-06-16Shown
Facility typeAI campus[1] derivedLikely2026-06-16Shown
Address5855 SW Kerry St, Cumming, IA 50061[1] Likely2026-06-16Shown
OwnerMicrosoftOwner: Microsoft[1] Confirmed2026-06-16Shown
End usersOpenAIUsers: OpenAI[1] Speculative2026-06-16Shown
UtilityMidAmerican Energyterritory 12341: MIDAMERICAN ENERGY CO (INVESTOR OWNED, BERKSHIRE HATHAWAY ENERG[2] derivedUnverified2022Shown
Current facility power228 MW[1] estimatedLikely2026-06-16Shown
Current facility power57 MW[1] estimatedLikely2021-01-01Superseded / alternative
Current facility power114 MW[1] estimatedLikely2023-06-30Superseded / alternative
Current facility power228 MW[1] estimatedLikely2025-03-01Superseded / alternative
Current facility power228 MW[1] estimatedLikely2025-10-08Superseded / alternative
Current IT capacity190 MW[1] estimatedLikely2026-06-16Shown
Current IT capacity48 MW[1] estimatedLikely2021-01-01Superseded / alternative
Current IT capacity95 MW[1] estimatedLikely2023-06-30Superseded / alternative
Current IT capacity190 MW[1] estimatedLikely2025-03-01Superseded / alternative
Current IT capacity190 MW[1] estimatedLikely2025-10-08Superseded / alternative
Estimated annual consumption1,398 GWh/yr[3] estimatedSpeculative2026-09-29Shown
ISO / RTOMISOMIDCONTINENT INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC..[4] derivedLikely—Shown
Balancing authorityMISO[2] derivedLikely—Shown
Nearest mapped substationMicrosoft Project Osmium Data Center (161 kV)way/830885772[5] derivedLikely2026-09-28Shown
Distance to substation0.6 km[5] derivedLikely2026-09-28Shown
Highest-voltage line nearby161 kV[5] derivedLikely2026-09-28Shown
State avg. industrial price9.99¢/kWh[6] Confirmed2026-07Shown
State avg. commercial price13.27¢/kWh[6] Confirmed2026-07Shown
Generation within 50 km1.46 GW[7] derivedConfirmed202502Shown
Buildings (planned)4[1] derivedLikely2026-06-16Shown
Buildings operational4[1] estimatedLikely2026-06-16Shown
Buildings operational0[1] estimatedLikely2018-12-18Superseded / alternative
Buildings operational1[1] estimatedLikely2021-01-01Superseded / alternative
Buildings operational2[1] estimatedLikely2023-06-30Superseded / alternative
Buildings operational4[1] estimatedLikely2025-03-01Superseded / alternative
Buildings operational4[1] estimatedLikely2025-10-08Superseded / alternative
Capital cost / investment$7.2B[1] estimatedLikely2026-06-16Shown
Compute (H100-equivalents)155,600[1] estimatedLikely2026-06-16Shown
Chip typesA100[1] Confirmed2026-06-16Shown
Chip typesH100[1] Confirmed2026-06-16Shown
Chip typesB200[1] Confirmed2026-06-16Shown
Construction startDec 18, 2018[1] derivedLikely2026-06-16Shown
First operationalJan 1, 2021[1] derivedLikely2026-06-16Shown