Louisville, KY
Completed in 2026
MAC Construction completed mechanism replacement work within Secondary Clarifiers 4, 5, and 6 at Louisville MSD’s Derek R. Guthrie Water Quality Treatment Center. The project involved removing existing equipment, modifying existing clarifier structures, installing new mechanical and electrical systems, and restoring surrounding roadway and site areas.
The work required careful sequencing within an active water quality treatment facility to complete the upgrades safely while supporting continued facility operations.
Impact & Purpose
- Replaced existing mechanisms within Secondary Clarifiers 4, 5, and 6
- Upgraded mechanical and electrical systems serving the clarifiers
- Installed new controls and underdrain systems
- Improved the long-term functionality and reliability of the clarification process
- Restored roadway and site areas following construction
Project Scope
- Draining of Secondary Clarifiers 4, 5, and 6
- Demolition and removal of existing equipment
- Removal and replacement of existing grout
- Modification of existing sumps
- Installation of new clarifier mechanisms and equipment
- Installation of electrical systems and controls
- Installation of new underdrain systems
- Equipment startup and testing
- Roadway and site restoration
Technical Complexity
- Work performed within existing secondary clarifier structures
- Draining and preparation of clarifiers for construction activities
- Demolition and removal of existing mechanisms and equipment
- Modification of existing sumps and placement of new grout
- Installation and integration of new mechanical systems
- Coordination of electrical, controls, underdrain, startup, and testing activities
- Restoration of roadway and site areas following completion of construction
