North Beach CSO Control Project
November 2013 Update - Construction contract is awarded
King County awarded the North Beach CSO Control Project construction contract to Stellar J Corporation of Woodland, WA. Stellar J teams are working on two other King County Wastewater Treatment Division projects, the upgrade of the County’s Interbay Pump Station and Kirkland Pump Station.
Save the date! Pre-construction open house January 11, 2014 (and bring your kids)!
Join us to meet Stellar J representatives and King County’s construction management team and learn about construction activities. Kids can have fun in the “Kids Construction Zone” and become a “Drain Ranger” learning how to protect the sewers, streams and Puget Sound at North Beach.
Open house- drop in anytime between 10:00 a.m. until 2:00 p.m.!
January 11, 2014
North Beach Elementary School
9018 24th Ave NW
Seattle, WA 98117
Take a minute to tell us how we’re doing and how we can help you during construction. Help us to help you!
The entire North Beach community will be receiving a survey in the mail about mid-November. The information you provide to King County will help us understand what we’re doing well and also what we can do better communicating with you in the future. You will also help us understand your needs during construction, whether you are a project neighbor, park user, commuter, or just someone interested in the North Beach CSO Control Project. You can take the survey online from now until December 16.
North Beach Pump Station, located on King County property next to Blue Ridge Park, is built on the footprint of the former City of Seattle treatment plant.
King County is designing and building an underground storage tank in the right-of-way in N.W. Blue Ridge Drive and Triton Drive N.W. This facility will need to store about 230,000 gallons of peak flows when the North Beach Pump Station reaches maximum capacity.
Learn more about the project area and elements.
Why does King County need to do this project?
In 2008, King County reported that the North Beach combined sewer overflow facility has 10 overflows per year on average that discharge a total of 2.2 million gallons into Puget Sound off North Beach. At North Beach, King County is working to meet current regulations set by the Washington Department of Ecology require no more than one untreated discharge per year on a long term average.
|Community meeting and briefings
-- Project update
-- Define general building size and storage
|January 25, 2012
-- Opportunity to provide input on landscaping and architectural design details
|May 12, 2012
|Community event at King County's North Beach facility
-- Project update
-- Design of landscaping and architectural elements
-- On-site preview of construction
|September 29, 2012
|Ecology approves design
|Construction procurement process
|Pre-construction community outreach
|Construction (18-24 months)
||2013 - 2015
View meeting calendar for upcoming public meetings, and North Beach CSO Control Project Timeline (PDF).
Regional facilities at North Beach
The North Beach Pump Station has provided wastewater service for the area since 1962 by collecting flows from the City of Seattle’s local sewer system. These flows are conveyed to the Carkeek Wet Weather Facility where they are either pumped to the county’s West Point Treatment Plant or, in large storm events, treated on site. The North Beach Pump Station is built on the footprint of what was once a City of Seattle treatment plant. The walls and foundation are from the original treatment plant.
Did you know?
- The North Beach Pump Station is built on the footprint of what was once a City of Seattle treatment plant. The walls and foundation are from the original treatment plant.
- When Metro was created by voters in 1958 to provide regional wastewater conveyance and treatment, local treatment facilities like the one in North Beach were considered for conversion to pump stations to bring flows to regional treatment facilities.
- The current service area for the North Beach Pump Station is 633 acres. Wastewater from additional areas within Blue Ridge are conveyed by gravity to the North Beach force main, where they combine with pumped flows to the Carkeek Wet Weather Facility.
- The North Beach Pump Station is largely built underground with access hatches and ventilation equipment above ground. Four pumps are used to convey up to 3 million gallons per day (mgd) of wastewater to Carkeek.
- The CSO facilities include a deepwater outfall upgraded in the 1970’s from the outfall that served the original treatment facility. Discharge to a second outfall, which usually conveys stormwater, helps to prevent backups into homes in large storms.
- The new CSO facility will introduce odor control at the North Beach site. Currently there is no odor control associated with the North Beach Pump Station. King County has not received odor complaints about this facility.