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