Armory Data Center (St. Louis)
120 MW data center at the former Famous-Barr warehouse, 3728 Market St., part of the $3 billion Armory Innovation District in Midtown St. Louis, developed by a team including TerraWatt and ARCO. ARCO Construction signed a project labor agreement, and the project is expected to create 1,050 union construction jobs. The city approved the project in September 2026; construction is expected from August 2027 to late 2029. No tenant has been announced.
Key facts
- Capacity
- 120 MW
- Estimated cost
- $3,000,000,000
- Building size
- 487,000 sq ftData center building (Cleanview); another tracker says 525,000
- Construction start
- Aug 2027Expected
- Expected completion
- 2029Late 2029
- Last verified
- Not yet re-verified
Companies and roles
- Developer
- General contractor
Unions
- St. Louis Building & Construction Trades Council · Project labor agreement · Multiple trades
- St. Louis Labor Council · Publicly supports the project · Multiple trades
Locals with jurisdiction over this site
Local with jurisdiction over this site (not confirmed on the job)
- Electricians
- Plumbers & pipefitters
- Ironworkers
- Sheet metal & HVAC
- Operating engineers (heavy equipment)
- Insulators
- Plasterers & cement masons
- Roofers
- Elevator constructors
Prevailing wages (government minimums)
Minimum hourly pay the U.S. Department of Labor sets for federally funded building work in this project's county (Missouri), by trade. It is a floor, not what this project pays: data center jobs often pay above scale, and non-union survey rates can be many years old.
| Trade | Wage /hr | Overtime 1.5× | Double time 2× | Benefits /hr | Total comp /hr |
|---|---|---|---|---|---|
| ElectriciansUnion rate · IBEW Local 1 · effective Jun 22, 2025ELECTRICIANOvertime 1.5× $73.94 · Double time 2× $98.58 · Benefits /hr $33.64 | $49.29 | $73.94 | $98.58 | $33.64 | $82.93 |
| Plumbers & pipefittersUnion rate · Plumbers and Pipefitters Local 562 · effective Jul 1, 2026PIPEFITTEROvertime 1.5× $81.90 · Double time 2× $109.20 · Benefits /hr $30.23 | $54.60 | $81.90 | $109.20 | $30.23 | $84.83 |
| IronworkersUnion rate · Iron Workers Local 396 · effective Aug 6, 2025IRONWORKEROvertime 1.5× $66.41 · Double time 2× $88.54 · Benefits /hr $31.65 | $44.27 | $66.41 | $88.54 | $31.65 | $75.92 |
| Sheet metal & HVACUnion rate · Sheet Metal Workers Local 36 · effective Aug 1, 2025SHEET METAL WORKEROvertime 1.5× $78.00 · Double time 2× $104.00 · Benefits /hr $27.12 | $52.00 | $78.00 | $104.00 | $27.12 | $79.12 |
| LaborersUnion rate · Laborers Local 110 · effective Jun 4, 2025LABORER: COMMON OR GENERALOvertime 1.5× $61.23 · Double time 2× $81.64 · Benefits /hr $17.56 | $40.82 | $61.23 | $81.64 | $17.56 | $58.38 |
| LaborersUnion rate · Laborers Local 1104 · effective Mar 1, 2025LABORER: MASON TENDER - CEMENT/CONCRETEOvertime 1.5× $47.70 · Double time 2× $63.60 · Benefits /hr $14.91 | $31.80 | $47.70 | $63.60 | $14.91 | $46.71 |
| Operating engineers (heavy equipment)Union rate · Operating Engineers Local 513 · effective May 1, 2024POWER EQUIPMENT OPERATOR: BOBCAT/SKID STEER/SKID LOADEROvertime 1.5× $65.19 · Double time 2× $86.92 · Benefits /hr $30.22 | $43.46 | $65.19 | $86.92 | $30.22 | $73.68 |
| CarpentersUnion rate · Carpenters Local 1011 · effective May 1, 2024CARPENTEROvertime 1.5× $59.67 · Double time 2× $79.56 · Benefits /hr $22.40 | $39.78 | $59.67 | $79.56 | $22.40 | $62.18 |
| InsulatorsUnion rate · Heat and Frost Insulators Local 1 · effective Oct 7, 2024HEAT & FROST INSULATOR (INCLUDES DUCT, PIPE AND MECHANICAL SYSTEMS)Overtime 1.5× $65.22 · Double time 2× $86.96 · Benefits /hr $27.24 | $43.48 | $65.22 | $86.96 | $27.24 | $70.72 |
| PaintersNon-union survey rate · effective Oct 10, 2023PAINTEROvertime 1.5× $49.34 · Double time 2× $65.78 · Benefits /hr $15.92 | $32.89 | $49.34 | $65.78 | $15.92 | $48.81 |
| Plasterers & cement masonsUnion rate · Plasterers and Cement Masons Local 527 · effective Apr 1, 2023CEMENT MASON/CONCRETE FINISHEROvertime 1.5× $57.69 · Double time 2× $76.92 · Benefits /hr $20.15 | $38.46 | $57.69 | $76.92 | $20.15 | $58.61 |
| RoofersUnion rate · Roofers Local 2 · effective Mar 1, 2025ROOFEROvertime 1.5× $60.00 · Double time 2× $80.00 · Benefits /hr $22.05 | $40.00 | $60.00 | $80.00 | $22.05 | $62.05 |
| Elevator constructorsUnion rate · Elevator Constructors Local 3 · effective Jan 1, 2025ELEVATOR MECHANICOvertime 1.5× $94.10 · Double time 2× $125.46 · Benefits /hr $38.44 | $62.73 | $94.10 | $125.46 | $38.44 | $101.17 |
- Wage:
- the hourly pay in the worker's paycheck, before taxes, at straight time.
- Overtime and double time:
- the wage × 1.5 and × 2. Federal contracts require time and a half after 40 hours a week; when double time applies (for example Sundays, holidays or after 10–12 hours) is set by each union contract.
- Benefits:
- paid by the employer on top of the wage into the worker's health insurance, pension and annuity, and apprenticeship training funds (sometimes vacation and holiday pay). Not in the paycheck.
- Total comp:
- wage + benefits for one straight-time hour.
Journeyman rates only; shift premiums and per diem are not included. Source: Davis-Bacon general wage determinations on SAM.gov.
Apprentices: rates above are for journeymen. Apprentices are usually paid a percentage of the journeyman rate, typically starting around 40–60% and rising about 10 percentage points every 6 months to a year until they reach the full rate. Exact steps vary by trade and local.
- U.S. Department of Labor wage determination MO20260080 (SAM.gov) (opens in a new tab)sam.gov · Government filing
Sources
Every fact on this page comes from these public sources:
- St. Louis Public Radio (opens in a new tab)stlpr.org · News
- St. Louis Labor Tribune (opens in a new tab)labortribune.com · News
- St. Louis Labor Tribune (opens in a new tab)labortribune.com · News
- St. Louis Labor Tribune (opens in a new tab)labortribune.com · News
- IBEW inside jurisdiction map (MO) (opens in a new tab)ibew.org · Other
- U.S. Department of Labor wage determination MO20260080 (SAM.gov) (opens in a new tab)sam.gov · Government filing
- Cleanview (tracker) (opens in a new tab)cleanview.co · Other
Found an error on this page? Report a correction (opens in a new tab)