Stage 1A is on the west end of the project (MP 56–58). This stage included significant soil stabilization to prevent slopes from entering designated wilderness on the north side of the corridor. Other improvements included retaining walls, drainage, wildlife undercrossings, erosion protection, guardrail, pavement, and signage and striping.

Designer: HDR
Contractor: Scarsella Bros
Award Amount: $21,130,000

Stage 1B is on the east end of the project, at approximately MP 45–46.5, and includes the Quartz Creek intersection as well as the intersection of the existing and proposed Sterling Highway (approximately MP 47). Stage 1B, which is currently under construction, consists of a pedestrian undercrossing (Coyote Notch), retaining walls, drainage, guardrail, pavement, and signage and striping.

Designer: R&M
Contractor: QAP-Traylor Joint Venture
Award Amount: $94,130,000

The Alaska Department of Transportation and Public Facilities (DOT&PF) designed the Juneau Creek Bridge in-house as a steel girder bridge in close collaboration with the new Construction Manager/General Contractor (CM/GC). Design of the bridge was completed in summer 2023. Construction of the bridge abutments is underway in 2026, with construction of the bridge continuing through 2027. The Juneau Creek Bridge will be the highest crossing in the state at 285 feet, the longest single-span bridge built in the state since 1982, and the longest erected and launched bridge in the state.

Designer: DOT&PF
Contractor: QAP-Traylor Joint Venture
Award Amount: $151,000,000

This project consisted of upgrading two existing roads on either side of Juneau Creek Canyon: West Juneau Road on the west and Slaughter Ridge Road on the east. These roads provide valuable access to Stages 2–6 throughout the duration of the project. This project also establishes a project office/staging area (Tract C) along the existing Sterling Highway near the Quartz Creek Road intersection.

Designer: DOWL
Contractor: QAP-Traylor Joint Venture
Award Amount: $4,500,000

Stages 3 and 4 consisted of the middle section (off the existing alignment) of the project. These stages established staging and disposal sites, roadway embankment, and drainage; and included construction of wildlife undercrossings.

Designer: DOWL
Contractor: QAP-Traylor Joint Venture
Award Amount: $105,000,000

Stage 5 includes the western intersection of the new Sterling Highway and the existing Sterling Highway (MP 55–56). DOT&PF selected a tight diamond interchange configuration for the design of the western intersection north of the existing highway. It will have on- and off-ramps to allow travelers to access the existing highway near Sportsman's Landing. In spring 2023, the U.S. Fish and Wildlife Service exchanged designated wilderness with Cook Inlet Region, Inc., and then sold the necessary right-of-way for the Juneau Creek Alternative to DOT&PF.

Construction of Stage 5 is anticipated to begin in 2029 and end in 2030.

Designer: DOWL
Contractor: QAP-Traylor Joint Venture
Award Amount: TBD

Stage 6, the final project phase, includes construction of all paving, signage, striping, guardrail, rumble strips, and trailheads; revegetation; and landscaping. The new highway is currently anticipated to be open to traffic by 2032.

Designer: DOWL
Contractor: QAP-Traylor JV
Award Amount: TBD