North Lake Sammamish flow diversion
The North Lake Sammamish Flow Diversions Alternatives Analysis project is not active at this time. The County expects to finalize its selection for a consultant team by late 2017. See the tentative project schedule below. Updates about the project will be provided here when available.
Currently, flows from the North Lake Sammamish Basin are routed to the South Treatment Plant through the East Side Interceptor (ESI). This project will divert up to 43 million gallons per day of wastewater from the North Lake Sammamish Basin and send them to the Brightwater Treatment Plant. This project is identified in the Regional Wastewater Services Plan (formerly named “York Pump Station Modifications”) as being necessary to maintain the ability of the ESI to convey peak flows during a 20-year storm event. The ESI is expected to reach peak flow capacity in 2021.
|3Q 2017||Procure design consultant|
|1Q 2018||Alternative analysis complete|
|3Q 2018||Predesign complete|
|3Q 2019||Final design complete|
|1Q 2020||Bidding and award|
|1Q 2020 – 4Q 2021||Construction|