SR 520 - Floating Bridge and Landings Project - Sentinel lights

What are the sentinels?

The new SR 520 floating bridge has four large towers, called “sentinels,” that mark the east and west ends of the world’s longest floating bridge. The tallest one, at the bridge’s east end, rises 123 feet above the lake’s surface. These towers not only add an architectural flair to the bridge, but also serve a critical function, allowing crews access to the bridge’s pontoon platform for maintenance.

Sentinel lighting

We illuminate the sentinels from dusk to dawn with LED lights. Teal is the standard color. Many color combinations are possible, however, which allows us to change the display color to commemorate holidays or support public events or causes of community significance.

How can I request a color change?

If you are interested in changing the sentinel lights for a public event or cause, please fill out our Sentinel Lighting Change Request Form (pdf 375 kb) and submit it to SR520Bridge@wsdot.wa.gov. Sentinel light changes are intended to recognize holidays and national and local campaigns, organizations and events of public significance. We cannot accommodate requests related to private events or political or religious events or campaigns. Details about the lighting policy and request process are listed in the request form (pdf 375 kb).

What lighting changes are coming up?

A calendar of August 2020 titled Sentinels schedule. The days of August 1 through 3, 4 through 8, 14 through 16, and 29 through October 1 are shaded in various colors representing different sentinel reservations.

Dates: Tuesday, Sept. 1, through Thursday, Sept. 3
Color: Purple
Cause: Chiari Malformation Awareness Month - DURAble Brains Foundation
Description: The SR 520 floating bridge will shine purple this September in honor of Chiari Malformation Awarenss Month, in partnership with the DURAble Brains Foundation. Chiari Malformation is a serious, uncurable neurological disorder that affects many families around the world.

Dates: Friday, Sept. 4, through Tuesday, Sept. 8
Color: Red, white and blue
Cause: Labor Day 2020
Description: The SR 520 sentinel lights will be turned red, white and blue this weekend to celebrate Labor Day 2020.

Dates: Monday, Sept. 14, through Wednesday, Sept. 16
Color: Red
Cause: Light it Red for Lymphoma - Lymphoma Research Foundation
Description: September is National Blood Cancer Awareness Month and SR 520 floating bridge is partnering with the Lymphoma Research Foundation to Light it Red for Lymphoma. The sentinels will shine red to raise awareness and provide hope to the lymphoma community.

Dates: Tuesday, Sept. 29, through Thursday, Oct. 1
Color: Purple
Cause: International Recovery Day - International Recovery Day, Inc.
Description: The SR 520 sentinels will shine purple in recognition of International Recovery Day. The goal of this day is to spread awareness of the multiple pathways to recovery from substance use disorder as well as celebrate individuals in recovery and their friends and family.