SW 86th Avenue Pump Station Project Construction Update: April 29, 2014
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 the SW 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: www.portlandoregon.gov/bes/sw86th
DEVELOPMENTS OF NOTE
- Crews plan to pour the concrete floor of the underground wet well and pump facility structure on Saturday, May 2.
- Work continues in the northwest corner of the construction site behind the Fanno Basin Pump Station Generator Building on a pit that will eventually hold a diversion manhole. Before they install the manhole, crews will launch a 60-inch diameter microtunnel boring machine from the wet well. In June, the machine will tunnel to the diversion manhole pit. Then work crews will install pipe in the tunnel to connect the wet well to the diversion manhole. They will install the diversion manhole after they retrieve the boring machine from the pit.
- Construction crews will install a slurry separation machine on the site as part of the microtunneling process. During tunnel boring, excavated soil and rocks are mixed with slurry and pumped back to the surface. The machine will separate soil from the slurry and the slurry will be reused. The noise level from the slurry separation machine will vary and depends on the amount of rock in the excavated soil.
- Crews continue to work on the surge tank valve vault on the east side of the site, and will start constructing the electrical building when that is complete.
ON-SITE OFFICE HOURS
Outreach staff will be back on the Fanno Creek Trail at SW 86th Avenue when the weather improves.
Sign up for project updates and project information at www.portlandoregon.gov/bes/fanno, email firstname.lastname@example.org, or call Debbie Caselton at 503-823-2831.
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 www.portlandoregon.gov/bes.