Project 18 - Walla Walla wastewater treatment plant
Project description: Upgrade existing filter wastewater treatment plant. The upgrade will improve effluent quality, remove ammonia and increase the average daily treatment capacity of the plant to 7.9-million gallons. The work includes a new influent screen, two aeration basins (1.4 million gallons each), two selector tanks ($1.4 million gallons each), three 100 foot diameter clarifiers, a sludge pumping station, a sludge dewatering facility and rehabilitation of the existing anaerobic diges-ters.
Aerial view of the Wall Walla wastewater treatment plant.|
Original contract amount: $15,859,227.
Start of construction: Jan. 1999.
Expected completion date: June 2000.
Contractor: Apollo Inc., P.O. Box 7287, Kennewick, WA 99336, (509) 586-1104.
Engineer: Kimball Engineering, W 579 Hayden Ave., Hayden, ID 83835, (208) 772-9119.
Owner: City of Walla Walla Public Works.
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