Piilani Highway Slope Stabilization at Nuanualoa Gulch

Project Name

Piilani Highway Slope Stabilization at Nuanualoa Gulch

Project No. 20-42


Scope of Work

The project involves repair of Piilani Highway near Nuanualoa Gulch that was damaged by a landslide.  The severely eroded soil slope is located just downslope of a recently constructed tieback and micro pile concrete wall and soil nailed shotcrete. The roadway is currently open and stable, no cracking or visual joint separation between pavement and concrete wall was observed.   The scope of work includes clearing, reinforced shotcrete slope with grouted soil nails, erosion control matting with mechanical earth anchors, hydromulch seeding, BMPs, traffic control, and other incidental items.

(Project Map)



NTP:  June 27, 2022

Contract Working Days:   150

Estimated Completion Date:   Tentative – September 2022


Streets Involved

Piilani Highway (Near Nuanualoa Gulch)



Prometheus Construction

651 Komohana St.

Kapolei, HI 96707

(808) 591-1143


Contract Cost



Project Contact

Department of Public Works
 200 South High Street Suite 410
 Engineering Division 
 (808) 270-7745

Construction Update:

Work Completed Last Week:  (09/26/22 to 09/30/22)

  • Prefinal walkthrough scheduled for September 28.
  • All noted punchlist items addressed on September 29.

Work Scheduled This Week:  (10/03/22 to 10/07/22)

  • Project work complete.

Additional Notes:

  • Contractor’s work hours are 7:00 am to 3:30 pm.
  • One lane alternating traffic control being utilized.