Washington Park Reservoir

Washington Park Reservoir is a water and wastewater infrastructure project in Portland, OR. The project constructed a seismically reinforced underground reservoir in Washington Park to preserve water service on Portland's west side. Portland Water Bureau materials identify the reservoir at 12.4 million gallons and state that it supports service for more than 360,000 people. Water and wastewater projects support essential public services and often require foundation or ground-support work around utility and treatment improvements. The work supported a very large urban excavation and deep foundation package for the underground reservoir. The foundation and shoring package supported construction of a large underground reservoir for Portland's west-side water system. Pacific Foundation supported the Washington Park Reservoir project with temporary and permanent soldier pile walls, tieback anchors, drilled shafts, dewatering, cathodic protection, instrumentation, tower-crane shafts, carved shotcrete, soil nail walls, and toe block anchors. The scope supported an underground reservoir excavation and foundation package that included 42-inch and 60-inch drilled shafts socketed into basalt and soldier piles installed in CFA and conventional modes.