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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

More Contact Info

Project Overview

The Fremont Pump Station, located on NE Fremont Drive near NE 89th Avenue, is a sewage pump station owned and operated by Environmental Services. Originally constructed in 1969, the pump station requires a facility upgrade to improve reliability and accommodate predicted future flows. The upgrade will help to ensure the pump station operates safely and efficiently to protect public health, water quality, and the environment.


Construction will begin in June 2018 and take about a year to complete.

Project Map

Fremont Pump Station project map


The Fremont Pump Station pumps sewage and stormwater from the Gregory Heights sanitary sewer basin, primarily east of NE 82nd Avenue south of the Grotto, to the Columbia Boulevard Wastewater Treatment Plant in north Portland. The pump station service area contains 298 acres of commercial, industrial and residential properties and undeveloped area not currently connected to the public sewer.

Substantial clogging resulting from an abundance of so-called “flushable” wipes has been observed at the pump station, requiring on average 12 hours per week maintenance response to unclog the pumps. Products advertised as flushable – like some wipes and diapers – don’t break down in water and frequently block sewer pipes. For more information about what not to flush, visit  

Pump Station Improvements

While the pump station structures will largely remain unchanged, aside from new roofing and minor repairs, proposed improvements to the pumping system will include the following:

  • Replace two of the existing drywell pumps with a single upgraded pump to alleviate clogging
  • Replace the piping and sumps to current standards
  • Replace the portable standby power generator with a quieter floor-mounted unit
  • Install additional noise reduction equipment
  • Replace all mechanical, electrical and control equipment and systems
  • Install new flow meter and vault
  • Upgrade the heating and lighting systems
  • Install a ventilation system and provisions for future odor controls to address intermittent odor concerns
  • Replace the water service to the pump station to the water meter in Fremont Drive
  • Replace the reduced pressure backflow prevention system
  • Make several minor exterior and interior repairs, including a fresh coat of paint to the pump station’s exterior
  • Replace one ailing tree with two smaller trees on site.