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Inside the DIY Movement to Fight Coastal Erosion
Farmer and activist David Cottrell’s innovative answer to coastal erosion has slowed the decline of “Washaway Beach” and sparked a movement across the US and Europe.
El Niño-driven storms and tidal currents play a role, but Kaminsky and his colleagues believe the issue has been exacerbated by a number of nearby jetties as well as dams built along the Columbia River to the south. But he estimates a meager average of five cubic yards of cobble per foot of shoreline, at a cost of $1.35 million—with roughly $527,000 of this being adaptive management funding from the Pacific Conservation District and $172,000 having been raised by landowners, on top of the initial $650,000 grant. Lab modeling has even found that in the right conditions, as sea levels rise, cobbles and beach sediment can migrate inland, leading to a land elevation gain, even as horizontal space is lost, offering hope for similar projects in the future.
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