Cornerstone Sanitary Lift Station AB

The Challenge

The Cornerstone Sanitary Lift Station required aggressive schedule delivery on a site with significant technical challenges:

Deep excavation (~50 feet) with complex dewatering requirements
Winter construction requiring temperature-controlled concrete pours
Cast-in-place concrete wet well constructed through challenging weather conditions
Concurrent construction with the Cornerstone Storm & Irrigation Lift Station
Proximity to residential development requiring architectural finishes and minimal disruption

The owner needed a fully operational lift station delivered on schedule despite weather constraints and site complexity.

Key Project Features

Cast-in-Place Concrete Wet Well

Deep excavation (~50 feet) with complex dewatering and shoring
Winter concrete pours with heating and temperature control
Durable, long-term wet well construction for municipal-grade performance

Prefabricated Building

Off-site fabrication while underground work progressed
High-quality finishes suitable for proximity to residential development
Faster on-site assembly and commissioning

Process Piping and Mechanical Systems

Self-performed mechanical scope for quality control
Prefabricated piping assemblies for faster installation
Integration with force mains and gravity sewers

Electrical and Control Systems

Advanced control panels for automated operation
Level control, pump sequencing, and alarm systems
Remote monitoring capability for long-term operations

Our Approach

Design-Build Collaboration

We worked to establish flow parameters, capacity requirements, and site constraints. Our design optimized wet well sizing, pump selection, and system configuration to meet long-term performance requirements while supporting an aggressive construction timeline.

Prefabrication for Speed and Quality

We prefabricated the building off-site in our shop while underground work progressed. This approach allowed us to:

Work on fabrication and site construction simultaneously without interference
Improve quality control in a controlled shop environment
Reduce on-site assembly time and weather-related delays
Meet the aggressive schedule despite winter construction challenges

Self-Performed Scope

Systems Group Inc. self-performed mechanical, structural, and process piping work, giving us direct control over quality, schedule, and problem-solving throughout the winter construction period.

Project Highlights

"We were able to accomplish the owner's schedule despite very challenging winter conditions and a deep, complex excavation. Prefabricating the building off-site while underground work progressed allowed us to double up activities and meet the aggressive timeline."

— Trevor Sigfusson, Principal, Systems Group Inc.

Cornerstone Sanitary Lift Station

Project Overview