The City’s Capital Improvement Projects are developed based on meeting the future needs of the various utilities and street systems and are generally formulated through a comprehensive planning process.
Wastewater treatment plant improvements
The City’s 2017 Wastewater System Facilities Plan describes a series of projects that need to be completed at the WWTP to allow the City to reliably and safely convey and treat sewage from the City. These projects add redundancy, enhance reliability, improve worker safety, support environmental requirements and eliminate hydraulic bottlenecks. Phase 1 construction should be complete in early 2021. Phase 2 - currently in design phase - is expected to be complete in 2023-2024.
Phase 1 Upgrades:
A new 80 foot diameter clarifier, including launder trough covers, weirs and scum baffles, clarifier sludge and scum collection mechanism, scum and waste activated pumping systems and RAS flow control system.
Rehabilitation and reconstruction of the existing clarifier.
Upgrade of UV disinfection system, including installation of new disinfection equipment.
A new mixed liquor pumping and flow splitting system.
A new effluent flow metering system.
A new automated secondary effluent pipeline flushing system.
Relocation and upgrade of the existing plant washwater system.
Site stormwater improvements.
Phase 2 Upgrades:
Construct new headworks, including influent screening, sampling, and metering.
Reroute raw wastewater from the original WWTP operations building to the ULID #6 lift station.
Redirect stormwater that currently enters the WWTP to stormwater treatment facilities.
Install new, larger motor on ULID #6 Lift Station Pump #2, and install new drives for all pumps.
Reroute WWTP recycle flows from the original WWTP operations building to the new headworks.
Construct two new oxidation ditches that each contain one aerobic zone, two anoxic zones, and three anoxic selector zones.
Provide a cover over the new oxidation ditches and mount solar power arrays on the covers.
Install aeration systems in the new oxidation ditches.
Extend WWTP washwater system to new areas of the WWTP.
Install chemical addition systems for pH and phosphorus control.
Convert existing oxidation ditch to two aerobic digesters.