Newman Lake, Washington

Newman Lake Homeowner's Association

The 1,200 Acre Newman Lage is the centerpiece of a residential development near Spokane, Washington.  The shallow (19 ft. mean depth) lake provides local drinking water, but is vulnerable to algae blooms, which decrease water quality, limit fish habitats and reduce recreational usage.

In order to avoid a capital investment for taste and odor treatment, an ECO2 hypolimnion SuperOxygenation system with induced horizontal flow was installed. the ECO2 system adds 3,300 pounds of oxygen per day to a side stream of 13 MGD withdrawn from the lake's hypolimnion layer. Effluent from the system's oxygenation cone had a D.O. of 34 mg/L and is discharged back into the lake through a 30 meter diffuser. The ECO2 system has consistently maintained oxic conditions in the lake for the past 14 years.