Field Notes

Beavers may not look like climate heroes, but their dams do the work of billion-dollar infrastructure. By slowing streams, they store water during drought, buffer floods, create fire-resistant wetlands, and build rich habitats for fish and birds. Their ponds even support agriculture by recharging aquifers and nourishing soils. If beavers were a new technology, we’d call them revolutionary. In reality, they’re proof that sometimes the best climate solutions come not from machines, but from letting nature get back to work.

Sauvie Island, nestled between the Columbia River and Multnomah Channel, played a brief but pivotal role in the 19th-century beaver fur trade. In the 1830s, it was home to Fort William, an American outpost aimed at intercepting pelts bound for the British-controlled Hudson’s Bay Company. Its location made it a chokepoint for furs moving from the Willamette Valley and inland Columbia Basin to the Pacific, where they entered the China Circuit and eventually became fashionable beaver felt hats in Europe. Heavy trapping devastated local beaver populations and altered Sauvie’s wetlands, leaving a lasting ecological mark. Today, the island’s farms and wildlife refuges conceal a past deeply tied to global commerce and the era of “soft gold.”