Zumwalt Prairie Preserve in northeastern Oregon — North America's largest remaining grassland of its type — is the Conservancy's largest-ever single Oregon purchase at nearly 27,000 acres, acquired in 2000. The preserve expanded six years later to 33,000 acres — 51 square miles.
In 2001, the Conservancy was selected to manage the Boardman Grasslands, a 23,000-acre native bunch grass prairie along the Columbia River. The site includes critical habitats for endangered Washington ground squirrels, above, and other sensitive species.
A new high-tech tool developed by Conservancy scientists in Oregon in 2003 promises to help stem the spread of invasive weeds across the U.S. and beyond.
The Conservancy, together with partners, rears native Olympia oysters in Netarts Bay on the Oregon coast, beginning with 5 million larvae spawned in 2005 and another 5 million spawned in 2006.
In one of the most ambitious wetland restoration projects in the West, in 2007, the Conservancy used around 100 tons of explosives to breach four levees — each a half-mile in length — to flood the Williamson River Delta Preserve and benefit water quality, wildlife and two endangered fish species.