Mobley Engineering

 Aurora Reservoir

• Located in what was once considered the prairie outskirts of Aurora, Colorado, Aurora Reservoir is managed by Aurora Water
• The reservoir was filled in 1990, and is primarily fed by inflows from Senac Creek and other minor streams
• With over 820 acres of water surface, the reservoir provides multi-use recreation, and serves as a drinking water storage facility for the city of Aurora
• The reservoir has a surface elevation of 5,950 feet
• Mobley Engineering installed 2,295 feet of diffuser line, with 1,920 feet of supply including in the trench and under water

Results

 Summary of project benefits

• Over the past two years, maintaining dissolved oxygen levels in the hypolimnion with the LOX ballasted linear diffuser, allowed us to:

1. Save approximately $850,000 in treatment chemicals and granular activated carbon costs
2. Answer approximately 200 fewer taste odor complaint calls
3. Spend considerably less time evaluating and making treatment related chemical changes
4. Blend in Aurora Reservoir water at the Wemlinger WPF in the middle of summer 2017 with no T&O complaints
5. Observed reduced soluble reactive and total phosphorus internal loading
6. Have great hope that these first two successful years are only the beginning of the healing and restoration in Aurora Reservoir's new life!

Site Pictures

Moving the diffuser line into position, prior to sinking it to the bottom

Hanging anchor weights on the line