City of Portland – Umatilla Pump Station Upgrade

This project consisted of the installation of a new pump station at the existing Umatilla Pump Station site. Erosion & Sediment Control, Traffic Control, Temporary Bypass Pumping & Construction of a new 144″ 40′ deep Triplex Pump Station Wet Well, Demolition, Electrical Upgrades, Plumbing, Mechanical Piping, Grading, Concrete & HVAC. The project had a very tight work area and the existing Pump Station had to remain in service with minimal interruption. By-Pass operations took place at night during low flows of 200 to 300 GPM. The new 144” Wet Well was installed as a caisson with the bottom of the cutting shoe extending 44’ below the existing ground surface. Emery & Sons developed a temporary by-pass plan for taking the existing pump station out of service using the new system & pumps, with temporary VFD’s. A 112 SF Bio-filter Facility was installed that include synthetic bio-filter media to control odor at the facility. As a finishing touch a green roof was constructed, and pervious concrete was installed, eliminating a conventional piped storm water system.

IMG00068-20100929-0301 IMG00040-20100809-1321 Umatilla 110 Umatilla 330 Umatilla 335   IMG00095-20110114-1047 Umatilla 115 IMG00099-20110117-1139 IMG00129-20110603-1253

Owner: City of Portland

Engineer: City of Portland

Location: Portland, Oregon

Completion Date: 2011