From the USFW website:
Conservation Efforts
Preserving and restoring historic and existing gopher habitat is essential for the conservation of this species. Since 2005, The Nature Conservancy has been working with Fort Lewis on prairie habitat enhancement and management on lands on and adjacent to the Fort. Restoration and management of prairie habitats have also been initiated in Thurston County on the Black River-Mima Prairie Glacial Heritage Preserve, Scatter Creek Wildlife Area, West Rocky Prairie Wildlife Area, Rocky Prairie Natural Area Preserve, and at Wolf Haven International.
Experimental translocation of gophers to land owned by Wolf Haven International
continues. As of winter 2010, the gophers have persisted in this location.