How The Dwyer Company Engineered High-Capacity Micro-Pile Foundations in Extreme Space Constraints
- Project Type: Commercial
- Project Services: Deep Foundation Systems, Micropiles
When Fairfield Water Treatment Plant required a foundation system inside an existing building capable of supporting two 31,500-pound chlorine tanks, the project presented a unique engineering challenge: access was severely restricted, with the room measuring approximately 15 feet by 20 feet and headroom limited to just 12 feet. In close collaboration with Building Crafts, Inc., The Dwyer Company deployed specialized compact equipment and installed 12 micro-piles engineered to support 30 kips each with a factor of safety of 2.5. Due to limited geotechnical analysis, a sacrificial load test was performed to verify the design before full installation. Each micro-pile extended 45 feet to reach load-bearing strata—proving that even locations with extreme access constraints and critical weight requirements can achieve structural integrity with the right attention to detail and coordination.
Quick Facts
- Location: Fairfield, Ohio
- Project Type: Foundation System
- Key Metric: 12 micro-piles designed to support 30 kips each with factor of safety of 2.5
- Key Metric: 45-foot pile lengths to reach competent bearing strata
- Key Metric: Sacrificial load test performed to verify design capacity
- Key Metric: Total load capacity of 63,000 pounds for dual chlorine tank system
- Timeline: Completed within facility operational windows with zero disruption to water treatment operations
- Partners: Building Crafts, Inc.
The Challenge:
The primary challenge was installing a foundation system capable of supporting 63,000 pounds of critical equipment within an existing building with severe spatial restrictions—requiring our team to carefully navigate 15×20-foot room dimensions with only 12 feet of vertical clearance and establish stable working conditions around active water treatment infrastructure. Conventional deep foundation equipment couldn’t achieve the required 45-foot pile depths and 30-kip load capacity without extensive demolition and costly facility modifications. Additionally, limited geotechnical data increased design risk, given the critical nature of the chlorine storage system and the need for verified, fail-safe structural performance.
The Solution: High-Capacity Micro-Pile Array with Load Testing Verification
The Dwyer Company designed and installed a 12-pile micro-pile foundation system that achieved 30-kip capacity per pile despite extreme access limitations. The solution required detailed pre-installation planning, compact equipment specifications compatible with the confined workspace, and careful coordination with ongoing water treatment operations.
The installation process involved mobilizing a specialized compact excavator capable of operating in the restricted 15×20-foot footprint, executing precision drilling operations to 45-foot depths with minimal clearance requirements, and implementing a sacrificial load test on the first pile to verify design assumptions before proceeding with full installation. Each micro-pile was installed to exacting specifications to ensure load distribution across the array and provide the factor of safety required for this critical chemical storage application.
The entire installation maintained the facility’s operational schedule, providing Fairfield Water Treatment Plant with a permanently engineered foundation system and eliminating the risk of structural failure or settlement under the substantial loads imposed by dual chlorine tanks.
Key Project Details
Load Capacity
with 12 micro-piles engineered for 30 kips each, supporting 63,000 pounds with substantial safety margin
Pile Depth
lengths extending to competent bearing strata verified through load testing
Safety Factor
factor of safety applied due to limited geotechnical analysis, ensuring conservative design
Load Testing
Sacrificial test pile conducted to verify capacity assumptions before full installation
Access Constraints
Installation completed within 15×20-foot room with 12-foot ceiling using compact specialized equipment
Coordination Excellence
Seamless collaboration with Building Crafts, Inc. to maintain water treatment facility operations throughout installation
Why Micro-piles?
The Dwyer Company’s micro-pile foundation system delivered the load capacity and installation flexibility required for this constrained, high-consequence project.
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Extreme Access Capability
Micro-pile installation using compact drilling equipment operated successfully in the 15x20-foot room with 12-foot clearance where conventional deep foundation methods would have required building modifications or complete demolition. -
Verified Load Capacity
The sacrificial load test provided empirical verification of 30-kip capacity per pile, eliminating uncertainty from limited geotechnical data and confirming the foundation system could safely support critical chlorine storage equipment. -
Enhanced Safety Factor
Engineering each pile to 30 kips with a 2.5 factor of safety created a robust foundation system that accounts for geotechnical variability and provides long-term reliability for hazardous chemical storage applications. -
Deep Load Transfer
45-foot pile lengths bypassed weak surface soils and transferred loads directly to competent bearing strata, ensuring zero settlement risk under the concentrated 31,500-pound point loads from each chlorine tank. -
Operational Continuity
The compact installation process allowed foundation work to proceed without disrupting water treatment operations, eliminating the costly downtime that conventional foundation methods would have required.
The Impact: Mission-Critical Infrastructure with Zero Compromise
Cost-Effective Solution
The micro-pile system eliminated expensive building modifications, demolition, and reconstruction that conventional foundation methods would have required, delivering budget optimization while meeting rigorous structural performance standards.
Schedule Preservation
Completing the foundation installation within operational windows prevented delays to the chlorine system upgrade and maintained uninterrupted water treatment services for the community.
Zero Structural Settlement
Most critically, the verified load testing and engineered design delivered absolute structural certainty for a foundation system supporting hazardous chemical storage—providing Fairfield Water Treatment Plant with a permanently stable, fail-safe foundation that will support decades of critical infrastructure operations with zero risk of settlement or structural failure.
Why Choose The Dwyer Company for Structural Integrity?
Deep History • Solid Choice
The Dwyer Company’s proven track record in commercial and industrial foundation systems made us the trusted partner for this critical infrastructure project. Our team’s technical expertise, advanced equipment, and commitment to precision execution delivered a foundation system that will support decades of heavy industrial use.