Two people died Saturday afternoon in a head-on automobile collision on Highway 26 near the Wasco-Jefferson county line.  According to the Oregon State Police, the accident occurred at around 1:30 Saturday afternoon.  A preliminary investigation revealed an eastbound car operated by 51-year-old James Mahon of Mineral Wells, Texas left its lane of travel and collided head-on with a westbound car driven by 63-year-old Carla Nichols of Redmond.  The OSP says Mahon and Nichols both sustained fatal injuries and were pronounced deceased.  A canine in Nichols’ vehicle survived the crash and was cared for by passerby’s.  Traffic on Highway 26 was affected for approximately 5 hours while the OSP Collision Reconstruction Unit investigated the scene.  The OSP was assisted by the Warm Springs Police Department and ODOT.