Northcentral District Projects

State Route 89A Safety and Road/Bridge Improvements

The Arizona Department of Transportation (ADOT) in conjunction with the Federal Highway Administration (FHWA), is planning four safety and roadway/bridge improvement projects on or adjacent to State Route 89A (SR 89A) between the cities of Sedona and Flagstaff. Three of the projects will require traffic restrictions and are being coordinated to minimize traffic impacts. The four projects are:

  • Pumphouse Wash Bridge rehabilitation (H8778)
  • Sedona City Limits to Bear Howard Drive Pavement Rehabilitation (F0047)
  • Rockfall mitigation (F0154)
  • Oak Creek Drainage and Sediment Control (H8907)
Project Map for SR 89A Safety and Roadway/Bridge Improvements Project
Pumphouse Wash Bridge Rehabilitation

Pumphouse Wash Bridge was constructed in 1931 and is located on SR 89A. Options to rehabilitate or replace the existing bridge have been under evaluation since October 2006. Pumphouse Wash Bridge is a historic structure listed on the National Register of Historic Places and full replacement of the bridge would negatively impact endangered species, stream water quality, and the historic nature of the bridge. These factors led to the determination that the bridge will be rehabilitated to extend its service life.

Work to rehabilitate the bridge will result in single lane closures along SR 89A for approximately three (3) months. One travel lane will remain open to accommodate traffic, with one lane closed to allow work on the bridge deck. The traffic restrictions are planned to be in during late summer and early fall of 2019. Additional work to complete the rehabilitation will occur in summer 2020 but is not expected to require lane restrictions on SR 89A.

Sedona City Limits to Bear Howard Drive Pavement Rehabilitation

SR 89A north of Sedona has experienced rapid degradation due to significant winter weather conditions in recent years. Pavement preservation work will be completed on SR 89A, from Sedona City Limits to south of Pumphouse Wash Bridge from milepost 374.5 to 386.6, to extend the life of the pavement. This project will also include replacing guardrail along the roadway to meet current safety standards and turnout modifications to improve safety. Work is tentatively scheduled for late summer to winter 2019, and will result in single lane closures and restrictions along SR 89A over the course of approximately five (5) months during work hours.

Rockfall Mitigation

The rockfall mitigation project will reduce the potential of rocks falling onto the travel lanes at two (2) locations. The first location is near Sedona City Limits at milepost 375.1; the second location is located in the switchback section at milepost 389.2.

Rockfall mitigation work is tentatively scheduled for fall 2020. To maintain safety during rock-removal operations, complete but intermittent closures of some parts of the highway around the rockfall areas will be necessary. The project is anticipated to take approximately three (3) months to complete.

Oak Creek Drainage and Sediment Control

The erosion control project includes installing retaining walls, stabilizing slopes, increasing roadside ditch capacity, and adding inlets and roadway cross-culverts to preserve deteriorating slopes and reduce sediment transport between mileposts 387.9 to 389. Drainage and Sediment Control project work is anticipated to occur in the fall of 2019.

For More Information
  • Email: MKirby@azdot.gov
  • Phone: Call Mackenzie Kirby, MPP, community relations project manager, ADOT Northcentral District, 928.525.6494
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