Sedimentation Basin Rehabilitation at OWASA Water Treatment Plant


Work was completed in early 2020 on a $3 million Capital Improvement Project to rehabilitate OWASA’s sedimentation basin, which we also call “settling tanks,” at the Water Treatment Plant.

OWASA treats on average 7 million gallons of water daily. The water originates from University Lake and Cane Creek Reservoir and travels via pipes to the treatment plant. Substances like fine dirt or algae go into our settling tanks, where they literally “settle” to the bottom, before we transport the water – minus these substances – through our filters.
Some of these tanks were built as early as the 1940s, and the most recent tank was constructed in 1974.

The rehabilitation work involved sand-blasting and coating more than 40,000 square feet of material. Over 4,000 bolts were removed, and 35 valves replaced. At the peak of the project, more than 20 people were employed as they worked to restore the tanks.

Read more about the community’s water supply, treatment and distribution or request a tour of the Water Treatment Plant to learn more in person!