SR 87 Slate Creek Slope Stabilization

Project Overview

The Arizona Department of Transportation has begun a project in Gila County on State Route 87, about 25 miles south of Payson, which will stabilize soil slopes showing distress as the result of heavy rains. Due to the erosion, the slopes have been moving toward the roadway, presenting the risk of breaking free and creating a hazard for motorists. The area has undergone several landslide-related repairs since 2005.

The work consists of excavating the northbound cutslope, installing riprap (rocky material) to stabilize the slope ditches, installing drainage and hauling the excavated material to a disposal site. Additional work includes removing and replacing barbed wire fence, seeding and other related items. The majority of the project area land use is undeveloped.

Project Area Map

SR 87 Slate Creek Slope Stabilization Map

What to Expect During Construction

Motorists should plan for the following daytime lane restrictions on SR 87 weekdays from 5 a.m. to 6 p.m. beginning Feb. 22 through the end of May:

  • Northbound SR 87 will be narrowed to one lane from milepost 223 to 224 and from milepost 229 to 230.
    • The speed limit will be reduced to 45 mph through the work zones.
  • Southbound SR 87 will be narrowed to one lane from milepost 229 to 230.
    • The speed limit will be reduced to 55 mph through the work zone.
  • Drivers are advised to watch for construction trucks, which will be entering and leaving the roadway frequently throughout the project to haul dirt and debris from the construction site.

Lane restrictions will be lifted after 6 p.m. on weekdays (noon on Fridays) and all day on weekends.

A vehicle width limit of 14 feet will be in effect.

Stay Informed

ADOT will provide more information about project schedules and potential traffic impacts as information becomes available. Stay informed of traffic restrictions before they occur by subscribing to receive timely traffic alerts and project updates by email.

Have a question or comment?

  • By phone: Call the ADOT Bilingual Project Information Line at 855.712.8530.
  • Online: Submit a question or comment by visiting and then selecting “Projects” from the dropdown menu.
  • By mail: Write to ADOT Community Relations, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007