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DNA shows where Washington culvert replacements helped spawning salmon

people sample water in a stream at the mouth of a culvert

To help struggling salmon populations, the state of Washington is legally required to replace hundreds of culverts that divert streams under roadways. The state transportation department is replacing old, rusting metal pipes with broad, concrete promenades that provide more gradual gradients and gentler flows for salmon swimming upstream to access more spawning grounds. The full scope of the effort will last 17 years and cost $3.8 billion. 

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REBURN: A new tool to model wildfires in the Pacific Northwest and beyond

This image shows the site of the Tripod Complex Fire one year later, in 2007.

In 2006, the Tripod Complex Fire burned more than 175,000 acres in north-central Washington. The fire, which was within the Okanogan-Wenatchee National Forest, was more than three times the size of Seattle. Yet while considered severe at the time, even larger wildfires in 2014, 2015 and 2021 have since dwarfed Tripod. Past research shows that large and severe wildfires like these were much rarer in the western U.S. 

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