Overlake Village South Detention Vault Project

  15010 NE 20th Street
Project Phase: Construction is underway
Timeline:  Project scheduled for completion summer 2015
Contact: Joe O’Leary, Construction Project Manager, 425-556-2738 
Steve Hitch, Senior Stormwater Engineer, 425-556-2891

The South Detention Vault is the first of three regional stormwater facilities to be constructed in Overlake Village. It will detain stormwater that has been treated locally within public rights-of-way and private development areas.

When completed the vault will have a total volume of 20 acre feet (about 6.6 million gallons). Park facilities will be constructed on top of the stormwater vault in the future. In the meantime, the property owner will use the area over the vault for parking.

Utility relocations to accommodate the new vault were completed in 2013. The vault is nearly complete and site restoration will be completed in 2015.

Check Redmond’s Traffic Alerts page for construction impacts to local streets.


Project Update: November 2014

Overlake Village South Detention Vault Construction

The first stage of construction will be completed by November 19, 2014. Major construction will be suspended during the holiday season to accommodate local businesses.

During this first stage, the south cell of the vault and flow splitter were completed. The south cell will be operational by early December to begin storing stormwater runoff.

The final stage of construction will begin on January 6, 2015. The vault construction continues to be on schedule for completion in summer 2015.

The South Detention Vault will be constructed in three stages:

Stage 1 (Non-Holiday Season)
March - November 
(Construction begins on the vault's south cell)

Stage 2 (Holiday Season)
November - January 2015

Stage 3 (Non-Holiday Season & Final Stage)

January 2015 - July 2015

Summer 2015: Project scheduled for completion

Project-Specific Information


March 4, 2014

February 18, 2014

June 18, 2013    
Council awards Phase 2 construction bid to Goodfellow Bros., Inc.

Council Final Acceptance: Phase 1 Utility Relocation Project

Utility Relocation project awarded to Shoreline Construction Co. by Council
April 23, 2013              Project Newsletter
April 17, 2013 Overlake Village Utility Relocation Plans
Dec 19, 2012           Stormwater Alternatives Analysis Report
Sept 5, 2012                 Geotechnical Engineering Report - GeoEngineers, Inc.
Nov 4, 2011    Project Newsletter
June 14, 2011   Overlake Facilities Overview Map
Mar 10,  2011    Consultant Selection Process Information Meeting Presentation
Feb 22, 2011 Preliminary Geotechnical Design Services Report
Nov 2010           Groundwater Elevations
Aug 31, 2010 Proposed Infrastructure Concept