UPDATE 10:35 PM 7/9 ALL LANES HAVE BEEN REOPENED.
UPDATE 10:10 PM Saturday 7/9: DPS saying they anticipate re-opening within a few hours.
Per ADOT, Interstate 17 has been closed North-bound at mile post 315, 8.0 miles South of PINEWOOD (20 miles south of Flagstaff) due to a serious accident.