Madison Metropolitan Sewerage District’s liquid processing facilities plan focuses on future needs of the district including increased capacity, infrastructure resiliency and flexibility to manage peak flows.
To accommodate community development while minimizing the impact of large capital projects on ratepayers, the plan provides a recommended schedule for project phasing based on urgency and logistical considerations through 2040. The plan integrates economic, environmental and quality of life considerations in a way that minimizes total resource expenditures over the project period.
Work on the plan was initiated in 2015 to evaluate:
- peak flow management;
- wastewater screening and grit removal systems;
- equipment and processes for biological nutrient removal; and
- ultraviolet light disinfection equipment; and
It has been more than 20 years since the district completed a facilities plan for its liquid processing system and much of the existing system is nearing the end of its useful life. The plan evaluated future loading conditions based on regional growth and changing precipitation patterns; assessed the condition of structures, equipment and controls; analyzed systems for energy efficiency and reliability; and more.
The plan itself does not directly authorize expenditures; specific projects still require approval by the Madison Metropolitan Sewerage District Commission. Full implementation of the plan through 2040 would cost $57.1 million in 2017 dollars.