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Portland Water Bureau

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Forest Park Low Tank Project in the Homestretch

By Lindsay Wochnick

Forest Park Low Tank Aerial Photo - January 2014 
Forest Park Low Tank Aerial Photo in January 2014

The Portland Water Bureau is completing construction on a 1.3-million gallon reinforced-concrete underground drinking water tank and a 1,408 square-foot pump station in northwest Portland. Identified in the city’s water system as the Forest Park Low Tank, the 73-foot diameter tank and adjacent pump station are part of an overall plan to better serve the current and future water needs of residents.  The tank will serve homes at higher elevations in the area and improve water capacity for emergency fire protection. 

Forest Park Low Tank - Aerial Photos in February, July and October 2013
Forest Park Low Tank aerial photos in February, July and October 2013 

The tank, built 41-feet deep into the ground, is being backfilled, covered, and compacted with layers of soil. Eventually native grasses will completely cover the tank. Over the next couple weeks, crews will fill, test and then disinfect the tank before it is connected to the operating water system.

The intricate system of piping running from the tank and connecting to the water main under NW Skyline Boulevard has been installed. The pipelines will soon undergo pressure testing to ensure the integrity and soundness of the pipes and joints within the pipeline. 

The walls and floor of the pump station have been constructed. Using gravel, crews have backfilled around the rectangular-shaped pump station.

The project is scheduled for completion in late May 2014. For additional information, visit the project webpage.

Lindsay Wochnick
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