Windermere Combined Sewer Overflow Reduction Project - WMBE Inclusion Information

CDM Constructors, Inc. (CDM) is the General Contractor/Construction Manager (GC/CM) for the Windermere Combined Sewer Overflow (CSO) Reduction project. This project will be constructed for Seattle Public Utilities. CDM will be seeking sealed subcontractor bids for various portions of the work, which will be competitively bid with public bid openings in accordance with RCW 39.10.380.

An informational flier on the project is available here.

If you are interested in this project please complete the Company Profile form and send it to CDM per the instructions on the form. Your company will be entered into our database and you will receive project updates by email.

Project General Scope

The Windermere CSO Reduction project calls for construction of an underground storage tank to temporarily hold approximately 2.1 million gallons of combined sewer overflow during major rain events. This tank will limit overflows into Lake Washington. The tank will typically be emptied within 24 hours and its contents gradually transferred to King County's system, so as not to overwhelm the treatment plant. The project also includes construction of a 30-inch gravity line to convey CSO flows to the tank and a 12-inch force main for pumping CSO out of the tank. Both conveyance lines will be in a shared trench.

Project Photos

Below are links to some photos of the project site:

Project Status

CDM will begin mobilizing crews to the project in fall 2012.  Shoring and excavation work will begin and continue through January 2012.  The improvements to Sportsfield Drive will be concurrent with the shoring and excavation work and is scheduled to be complete in November 2012.

Potential Subcontracting Opportunities

CDM's subcontracting plan outlines the bid packages that will be publicly bid in accordance with RCW 39.10.380. The items below represent the scopes of work that will be subcontracted. These scopes do not represent the final bid packages that will be released for bid. 

  • Excavation
  • Shoring
  • Trucking
  • Open Trench Piping
  • Trenchless Piping
  • Asphalt Paving
  • Concrete Paving
  • Pavement Striping
  • Concrete Structures
  • Curbs, Gutters & Sidewalks
  • Mechanical
  • Coatings
  • Electrical & Illumination
  • Instrumentation & Controls
  • Landscaping

Bids have been received for the following bid packages:

  • Excavation
  • Shoring

Upcoming bid packages including the scopes indicated above will be issued for public bid. The structural concrete and conveyance packages are two packages anticipated to bid out in October 2012. A call for bids will be advertised in the Daily Journal of Commerce prior to release of those packages.

City WMBE Outreach Contact Information

Miguel Beltran, City Contract Compliance Manager
Phone: 206-684-4525

CDM WMBE Outreach Contact Information

Simon Lee, CDM Project Engineer
Phone: 425-519-8300

Rene Finnie, Pacific Communications Consultants Inc., CDM Project Diversity Manager
Phone: 206-818-7577

This site is updated periodically. Please continue to check back for the latest news and information on this project.