The Arizona Department of Transportation has scheduled a FULL CLOSURE of US 89A from 6 a.m. to 6 p.m., Tuesday, March 10, between Jacob Lake (milepost 579) and Cliff Dwellers (milepost 547) in Coconino County.The Arizona Department of Transportation has scheduled a FULL CLOSURE of US 89A from 6 a.m. to 6 p.m., Tuesday, March 10, between Jacob Lake (milepost 579) and Cliff Dwellers (milepost 547) in Coconino County.