Charles M. Russell Wetland Management District Charles M. Russell Wetland Management DistrictStation reference point WPA Open (Open)6,344 acres Clark's Fork WPA (Special regs)261 acres Spidel WPA775 acres Tew WPA557 acres War Horse WPA41 acres Hailstone WPA1,766 acres Hansen WPA2,806 acres Spidel WPA487 acres