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Wildlife Protection

Keeping It Simple: Easy Ways to Help Wildlife Along Roads

"Lampshades" on bridge lights protect young salmon

Lighting on a section of the Cedar River Trail - the pedestrian crossing under the I-405 Bridge over Cedar River - used to cause problems for migrating salmon fry. The lights shone down on the river, slowing the passage of the young salmon and making them more visible to predators. To meet this challenge, Washington State Department of Transportation technicians mounted custom-made black rubber shields onto the bridge trail lights. Now the young salmon can swim quickly and with much less risk of predation.
--Apr 25, 2003

John Cornelius, (206) 442-2113 or

Close-up of fully shielded light fixture
Washington State Department of Transport photo
Fully shielded light fixture on the I-405 Bridge over Cedar River

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On or Near Bridges - Washington
Updated: 12/12/2012
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