City of Estacada
The City of Estacada’s raw water pump station, high service pump station and reservoir number 1 were constructed and put into service in 1955. The water treatment plant and reservoir number 2 were constructed and put into service in 1973. In 2001 the system was expanded into a current nominal capacity of 2.0 million gallons per day (MGD).
Raw is pumped to the adjacent treatment plant by two vertical turbine pumps located on a metal platform constructed over the Clackamas River, each with a nominal capacity or 1.0 MGD. Treatment facilities include two 0.5 MGD conventional rapid sand filtration units, including flocculation, tube settlers and sand filters in steel tanks. In 2001 additional 1.0 MGD of filtration capacity wea added with a stand-alone tank for flocculation and plate settlers, followed by a second stand-alone tank that contains two bays of rapid sand filters. The current capacity is 2.0 MGD.
The filtered water is then pumped into the on-site clearwells for a treated water capacity of 225,000 gallons to meet disinfection contact time requirement for the plant.
From the clean wells, finished water is pumped by three High Service pumps into the distribution system. The pumps provide a nominal capacity of 2.0 MGD with one pump out of service. The water is efficiently distributed throughout the service area with adequate pressure and volume.
The three zone distribution system is comprised of a variety of pipe including steel, ductile iron, asbestos cement and PVC. Since 1993 the city has completed numerous replacement and upgrades to the distribution piping system. Most notably; 1) installing approximately 5.500 feet of new 12-inch PVC main to feed reservoir No. 3; 2) replacing approximately 2,000 feet of 8-inch diameter ductile iron pipe with 12 inch PVC main which feeds reservoir No. 1; installing approximately 6,000 feet of new 12-inch PVC main to feed new development north of Coupland Road; and 4) the installation of several pressure reducing valve stations to create a new intermediate service zone.