Cutting back the mountain slope and constructing a gravity buttress wall is part of the proposed solution to repair US 89 near Page, which was damaged in a February 20 landslide.

The recently completed geotechnical investigation included geologic mapping, subsurface exploration and monitoring, laboratory tests and slope stability analyses. The 463-page report concludes the recent landslide was a reactivation of a small portion of an ancient landslide, but little to no new movement has occurred since testing began.

ADOT has posted a media release summarizing the geotechnical report, and the full report, on the US 89 home page.

In addition, to the proposed US 89 solution, which could take more than two years to complete, ADOT previously was awarded $35 million in federal aid to pave Navajo Route 20 and establish it as a shorter detour route for motorists until repairs are complete on US 89.

Construction started in late May on Navajo Route 20 and is scheduled to be completed in August. The route will eventually serve as the interim bypass for drivers, and will be designated Temporary US 89 (US 89T) once paving is complete.

The current detour established for drivers is using US 160 (Tuba City exit) and State Route 98, which is approximately 115 miles long and 45 miles longer than the direct US 89 route. Drivers also have the option to take US 89A north to Marble Canyon toward Fredonia to reconnect to US 89 in Kanab, Utah.

ADOT has launched a range of communication tools, including a web page ( dedicated to keeping the public informed about the status of the closure and alternate travel routes, complemented by up-to-date video and photos of the roadway damage on US 89.

For more information about ADOT projects and programs across Arizona, please call the Project Hotline at 855.712.8530, or e-mail us at