The 6,452-acre Bridgeport unit is located immediately south of the town of Bridgeport. This unit has the most diverse array of habitats found on the Sagebrush Flat Area. Although shrubsteppe is the most dominant habitat, here one can also find permanent lakes, seasonal ponds and wetlands, meadow steppe, grasslands, aspen groves, while basalt cliffs and stands of Ponderosa pine overlook the Columbia River and the town of Bridgeport. Year-round and seasonal streams include Middle Foster Creek and West Foster Creek. Beavers have created a series of ponds in West Foster Creek and Fye Draw and there are numerous natural springs. Along with this diversity of habitats is a diversity of wildlife. Many shrubsteppe dependent species use the area including sharp-tailed grouse, sage grouse, sage thrasher, Brewer�s sparrow, vesper sparrow, loggerhead shrike, short-eared owl, prairie falcon and white-tailed jackrabbit. Neotropcial songbirds use the riparian areas, aspen groves, and Ponderosa pine stands. Mule deer can be found through the area. Upland game birds include blue grouse, Hungarian partridge, California quail and limited numbers of pheasant and Chukar. Upland bird hunters are advised that sharp-tailed grouse and sage grouse are protected species and can be found anywhere on the unit. If you intend to hunt upland birds you should be proficient at identifying both sharp-tailed grouse and sage grouse.
Elevation ranges from 2,833 feet in west to 1,000 feet near the town of Bridgeport. Current management is focused on restoration of old agricultural fields to native vegetation, expanding and improving riparian areas and weed control.