AWRA-WA November Seattle Dinner Meeting

  • 07 Nov 2018
  • 5:30 PM - 8:00 PM
  • Naked City Brewery, 8564 Greenwood Ave N Seattle, WA 98103
  • 26


Registration is closed

The American Water Resources Association Washington Section

November 2018 Dinner Meeting:

Developing An Innovative Stormwater Treatment System for The Longest Floating Bridge In The World

Stephen Sax
Technical Team Lead, Washington State Department of Transportation

 Wednesday, November 7th, 2018

Naked City Brewery
8564 Greenwood Ave N
Seattle, WA 98103

(206) 838-6299

 Social and Networking - 5:30 PM to 6:30 PM
Dinner - 6:30 PM to 7:00 PM
Presentation - 7:00 PM to 8:00 PM


With a rapidly growing population, increased pressure on surface water resources and several ESA listed species, managing stormwater is a critical element in Washington State.  As a result, the state has some of the strictest stormwater treatment requirements in the nation. The SR 520 Bridge is a critical corridor for traffic and freight mobility.  It was constructed in 1962 with no stormwater treatment and was at the end of its life cycle. The Washington State Department of Transportation (WSDOT) is required to treat all stormwater from highways, rest areas, and ferry terminals for areas with new impervious pavement and areas with no stormwater treatment. Funding was secured to design and construction a new bridge with stormwater treatment.  Ecology has prescribed stormwater treatment options that can limit innovation and in some situations, such as a floating bridge, are not viable options. To address this challenge an alternative strategy, known as AKART was used to develop stormwater treatment options on the bridge.  An interdisciplinary team was created to develop an innovative treatment system that met water state quality standards and restored, preserved, and enhanced aquatic habitat for ESA listed and other species in Lake Washington.

About the speaker
Stephen Sax has over 25 years of professional experience in the private sector, academia, and government agencies enhancing upland and aquatic ecosystems. During the last 16 years Mr. Sax has been a technical lead and project manager with the Washington State Department of Transportation overseeing stormwater, groundwater, permitting, policy, monitoring, wetland, and stream restoration issues during design and construction on over 100 transportation projects. He spent the last five years leading interdisciplinary teams replacing the SR 520 Floating Bridge, which at 7,579 feet is the longest floating bridge in the world.  The team developed an innovative stormwater treatment system and post construction monitoring program that was approved by the WA State Department of Ecology.  The end result was as a low maintenance system that meets state water quality standards.  This is very unique system being the only one of its type in North America.  Mr. Sax has shared this information with hundreds of practitioners at seminars and workshops.


$30 for current AWRA-WA members

$35 for guests

Free for students (Reserved for student members enrolled full-time, as outlined on the  AWRA-WA website,

If you are planning to pay in person at the event, please note that we can only accept payment then in the form of cash or a check.  If you want to pay using PayPal or a credit card, please do so online before the event.

Registration as a guest is available if you are not a member of AWRA-WA.

Cancellation Policy: AWRA-WA will fully refund the registration fee if cancellation notice is received at least 5 days before the event.


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