The structural slab can't pour until the pad is dialed. The transformer can't set until the foundation is right. Backwell self-performs foundation excavation and pad preparation for data center construction across Central New York with the tolerance, compaction, and certification that EPCs need to keep schedule alive.
Foundation & Pad Scope We Handle
Pad Construction
- Structural slab subgrade , engineered fill placement, lift-by-lift compaction, ±0.1 ft tolerance (±0.05 ft for tight-tolerance applications)
- Cooling tower foundations , excavation, sub-base preparation, anchor bolt template handling
- Generator yard pads , fire-rated foundations, fuel containment integration
- Transformer pads , utility-grade subgrade, oil containment integration, anchor bolt precision
- Switchgear pads , concrete-on-grade, conduit stub-up coordination
- Inverter / PCS pads , for hyperscaler-class power conversion
- Cooling vault foundations , chilled water plant infrastructure
Specifications We Hit Routinely
- Compaction: 95% modified Proctor under structural slabs (per ASTM D1557)
- Tolerance: ±0.1 ft standard, ±0.05 ft for tight-tolerance applications
- Sub-base: stone or engineered fill per spec, lift-by-lift testing
- Anchor bolt template: precision-set, EPC and equipment supplier coordination
- Concrete: 4,000 psi minimum, mix design per structural EOR
Equipment Foundations We've Built
- Substation transformer foundations (115 kV / 230 kV)
- Capacitor bank foundations
- 115 kV dead-end structure piers
- Static wire mast piers
- Bus support pedestals
- Control enclosure slabs
- Generator and fuel tank pads
- NGR and station service transformer pads
We've delivered all of these on solar civil and substation packages , the same scope applies to data center power infrastructure.
QA/QC
- Concrete cylinder testing per ASTM C31 / C39 every pour
- Compaction testing per ASTM D698 / D1557 at every lift
- As-built survey of every anchor bolt location, every foundation corner, with 0.05 ft tolerance documentation
- Special inspections coordinated with the EPC's third-party inspection agency
- Rebar inspection before each pour
- EOR review of installed reinforcement
Tight-Tolerance Capability
Standard data center pad construction tolerates ±0.1 ft. Some applications , semiconductor-adjacent buildings, high-precision equipment foundations, tightly-controlled cleanroom adjacencies , require ±0.05 ft.
We deliver tight tolerance through:
- Laser-guided fine grading equipment
- Multiple compaction passes per lift
- Pre-pour and post-pour as-built survey
- Coordination with EOR on the day of pour to confirm subgrade
Counties We Serve
Sequencing
Foundation and pad work sequences against:
- Mass excavation (we self-perform) , pad subgrade is delivered ready for fine grade
- Utility trenching (we self-perform) , laterals stub up before pad pour
- Ductbank (we self-perform) , feeders stub up before pad pour
- Anchor bolt sets , coordinated with equipment supplier templates
- Concrete pour , certified subgrade and rebar before pour
- Equipment set , turned over to the electrical / mechanical contractor with as-built documentation
We schedule across these dependencies to keep the structural and equipment teams moving.
Why Backwell
- Self-perform , pad and foundation work done by Backwell crews
- Tight-tolerance capability , ±0.05 ft when project requires it
- Bonded , performance and payment bonding capacity
- Davis-Bacon / NY prevailing wage compliant
- Women-Owned Small Business (WOSB) , federal designation
- SAM.gov registered , UEI XY4KWNPR6ES5
Unit Pricing for Reference
| Item |
Rate |
| Concrete (in-place) |
$1,100 / CY |
| Rebar |
$1.85 / lb |
| Engineered fill |
$28 / Ton |
| Compaction testing |
by spec |
| Special inspections |
by spec, coordinated |
Project-specific pricing varies based on foundation count, depth, complexity, and tolerance requirements.
FAQ
Can you hit ±0.05 ft tolerance for semiconductor-adjacent foundations?
Yes. Standard tolerance is ±0.1 ft. Tight tolerance applications get laser-guided fine grading and pre-pour as-built confirmation. We've delivered ±0.05 ft on substation foundations and industrial equipment pads.
Do you handle anchor bolt templates from equipment suppliers?
Yes. We coordinate directly with equipment suppliers and the EPC structural EOR on anchor bolt template handling, set, and as-built verification.
Are you experienced with NYPA substation transformer foundations?
Yes. We've delivered foundations for 115 kV main power transformers (40+ CY concrete, heavy rebar, oil containment) on solar civil packages. Same engineering applies to data center substation infrastructure.
Can you handle the rock excavation common in Central NY foundation work?
Yes. Limestone bedrock is shallow in Jefferson, northern Oneida, and parts of Onondaga County. Mechanical breaking with high-capacity excavators and hydraulic hammers , no blasting. Rock excavation runs at $125/CY unit rate.
How do you handle special inspections?
We coordinate with the EPC's third-party special inspection agency on rebar, concrete, anchor bolts, and compaction. Inspector availability is part of our schedule planning. We don't pour until special inspections sign off.
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