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)

 

When

NTP:  June 27, 2022

Contract Working Days:   150

Estimated Completion Date:   Tentative – September 2022

 

Streets Involved

Piilani Highway (Near Nuanualoa Gulch)

 

Contractor

Prometheus Construction

651 Komohana St.

Kapolei, HI 96707

(808) 591-1143

 

Contract Cost

$1,370,224.90

 

Project Contact

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


Construction Update:


Work Completed Last Week:  (07/25/22 to 07/29/22)

  • Complete installation and testing of remaining soil nails.
  • Continue installation of geocomposite drain mat.
  • Begin installation of welded wire fabric and rebar.

Work Scheduled This Week:  (08/01/22 to 08/05/22)

  • Complete installation of welded wire fabric and rebar.
  • Begin installation of permanent shotcrete stabilization.

Additional Notes:

  • Total of 150 production soil nails to be installed.
  • Contractor’s work hours are 7:00 am to 3:30 pm.
  • One lane alternating traffic control being utilized.