Wemlinger Comprehensive Upgrades Program (CUP)

Thanks for visiting. This site is your place to stay up to date on the Wemlinger CUP project, ask questions, and share your feedback.

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Project Information (You're here!)
Start here for an overview of the project. We'll add information and new pages as the project moves forward, so check back from time to time.

Surveys
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Key Dates
This section highlights important dates like public meetings, traffic advisories, and project milestones. We'll update it as schedules change.

Documents
Find project materials like presentations, renderings, and other reference documents.

Lifecycle
See where the project is in the overall process, from planning and construction to final site restoration.

FAQs
Find answers to common questions about construction hours, noise, parking, neighborhood impacts, and what to expect during construction. If you don't see your question, send it to us through the Questions tab and we'll get back to you as soon as we can.

Who's Listening
Meet the team member(s) who monitor this site and respond to your questions.

Because this is a public site, we ask everyone to keep comments respectful and courteous. If you'd like a response from the project team, please use the Questions tab. Comments are for general feedback.

Whether you live nearby, have a student at a local school, enjoy fishing or walking at Quincy Reservoir, or simply care about the reliability of Aurora's water system, this project supports the City's long-term water needs.

Aurora Water is investing in your future by:

• Expanding Water Sources - Today, Wemlinger treats water from only one source, Rampart Reservoir. This project prepares the facility to treat water from three additional local supplies, including Aurora Reservoir, Quincy Reservoir and Cherry Creek Wells. These additional sources will strengthen the system's reliability and provide more flexibility in how our water supply is managed.
• Improving Resiliency - Enhancing treatment processes so the facility can better handle seasonal changes in water quality, such as natural algae growth or heavy storm runoff.
• Modernizing Infrastructure - Replacing aging, equipment and structures to ensure the facility continues operating smoothly and dependably for decades to come.
• Enhancing Operations - Updating older systems with modern approaches that support safe, reliable service for staff and customers.

Aurora Water is completing a series of major upgrades at the Wemlinger Water Purification Facility (WPF) and Quincy Reservoir to support new water sources, improve treatment and modernize aging infrastructure. Below is an overview of key elements being built at each site:

Wemlinger Site

• New Pre-Treatment Building - A state-of the art facility that filters out organics and sediment-heavy water. It will allow Wemlinger to clean up to 80 million gallons of water per day.
• Modern Chemical Feed Building - A safer, fully updated space located east of the current chemical room. This building houses new treatment systems, including a carbon dioxide system that helps keep water pH properly balanced.
• Zone 4/5 Pump Station and Surge Tanks - A highly efficient pump facility that reliably moves clean water through Aurora's network of water mains and to customers' taps.
• Filter and Valve Modernization - Complete replacement of internal filter valves and electronic flow meters to reduce future maintenance needs and improve long-term reliability.
• Electrical Upgrades - Replacing older transformers, control centers, and wiring with modern, efficient equipment that supports dependable power and backup systems.

Quincy Site

New Drying Basins - Because the upgraded treatment process will capture more natural sediment and solids from our additional water sources, we are adding three new drying beds at Quincy Reservoir. These basins will safely process and manager the increased solids produced during water treatment.