Skip to Main Content View Text-Only

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Suite 1000, Portland, OR 97204

11-08-13: SW 86th Avenue Pump Station Construction Update

SW 86th Avenue Pump Station Project Construction Update: November 8, 2013 Environmental Services works to protect water quality and the environment through wastewater collection and treatment, sewer construction and maintenance, stormwater management, and stream and watershed restoration.  When theSW 86th Avenue Pump Station is complete at the end of 2015, it will increase the capacity of the Fanno Basin Sewer System to ensure that the system can handle all wastewater flows during large rain storms.  It will protect public health and watershed health, specifically Fanno Creek.

A project map is available at:


Construction crews are on schedule and continue to install the underground wet well and pump facility structure, which will take several months. The first of four concrete pours took place on October 19.  The next pour will take place in a couple of weeks. Due to the groundwater and geotechnical conditions, the wet well and pump facility is being constructed using a caisson method.  The caisson is a watertight structure, which will be approximately 26 feet in diameter and over 40 feet deep.  The structure appears to be above ground right now, but the weight of the concrete will gradually push the structure below ground. Recent photos of structure above ground here.

On Monday, October 21 a coyote visited the project site. He was spotted taking a nap in a pile of wood chips, but eventually chased off due to not having the proper Personal Protective Equipment (PPE).  Photos of coyote visit here.


  • Environmental Services received an inquiry asking if all of the trees removed on the project site were supposed to be removed.  All trees removed from the site were identified to be removed.  See tree removal plan here.  There are several more trees to be removed in the future at the northwest corner near the emergency generator building next to the Fanno Basin Pump Station.  There may be a couple of trees that need to be removed on the south side of the property adjacent to homes onBohmann Parkway due to instability.  Neighbors will be notified of any tree removal in the future.
  • Many trail users and residents have asked about the large circular structure on the project site. This is the wet well and pump facility structure that will be underground when finished.



Outreach staff are available on the Fanno Creek Trail atSW 86th Avenueweekly (weather dependent) to provide updates and answer questions.

  • Tuesdays from 8:00 a.m. to 10:00 a.m.
  • Fridays from 3:00 p.m. to 5:00 p.m.


Sign up for project updates and project information at, email, or call Debbie Caselton at 503-823-2831. Updates will also be provided on the construction hotline at 503-823-1312.

Debbie Caselton
Public Affairs
City of Portland Environmental Services
1120 SW 5th Avenue, Room 1000, Portland, OR 97204
Phone: 503-823-2831 | Fax: 503-823-5228

Working for clean rivers

Environmental Services works to protect water quality, and the environment through wastewater collection and treatment, sewer construction and maintenance, stormwater management, and stream and watershed restoration. Learn more at

Heartbleed Security Notice

A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server. is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.