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 October 2019 labeled Sentinels schedule. The nights of October 1 through 6, 10 through 13, 17 through 20, 24 through 27 and 30 through 31 are shaded in various colors, representing lighting reservations.

Dates: Monday, Sept. 30, to Friday, Oct. 4
Color: Purple
Cause: Rett Syndrome Awareness Month
Description: Each October the Rett Syndrome community comes out in full force for Rett Syndrome Awareness Month, and the SR 520 Program is proud to support their efforts. Rett is a severe neurological disorder that primarily affects girls and is typically discovered in the first 2 years of life.  Symptoms of Rett include Parkinson's, Epilepsy, Anxiety, Autism and Cerebral Palsy all in one. Currently there is no cure.

Dates: Friday, Oct. 4, to Monday, Oct. 7
Color: Green
Cause: World Cerebral Palsy Day
Description: The SR 520 floating bridge sentinels will shine green this weekend in honor of World Cerebral Palsy Day - Sunday, Oct. 6.

Dates: Thursday, Oct. 10, to Monday, Oct. 14
Color: Pink, green and teal
Cause: National Metastatic Breast Cancer Awareness Day
Description: Sunday, Oct. 13 is National Metastatic Breast Cancer (MBC) Awareness Day, and the SR 520 bridge sentinels will be lit in MBC awareness colors - green, pink and teal! This day helps give hope to the 155,000 people faced with Metastatic Breast Cancer and their families in the U.S.

Dates: Thursday, Oct. 17, to Friday, Oct. 18
Color: Purple
Cause: GLAAD Spirit Day
Description: The SR 520 sentinels will "Go Purple" Thursday, Oct. 17, as part of Spirit Day - a day dedicated to speaking out against LGBTQ bullying and standing with LGBTQ youth.

Dates: Friday, Oct. 18, to Monday, Oct. 21
Color: Purple and gold
Cause: University of Washington Homecoming
Description: In support of our neighbors to the north, the SR 520 Bridge will shine purple and gold all weekend long as part of UW's annual Homecoming celebration.

Dates: Thursday, Oct. 24, to Monday, Oct. 28
Color: Red, blue, green and yellow
Cause: National Hope for Henry Day
Description: The SR 520 sentinels will be lit red, blue, green and yellow all weekend in support of the Hope For Henry Foundation, a group dedicated to reinventing how hospitals care for seriously ill children and their families. They do this through innovative programs that entertain, reduce stress and empower children to be active participants in their own care.

Dates: Wednesday, Oct. 30, to Friday, Nov. 1
Color: Orange
Cause: Halloween
Description: Happy Halloween! The SR 520 bridge will shine orange to celebrate this spooky holiday!