Parks Highway MP 99-163 Drainage & Culvert Improvements
State/Federal Project No: CFHWY00592/0A41042
Updated February 2026
2023 Culvert AOP Grant Applications
Project Overview
The Alaska Department of Transportation and Public Facilities, in cooperation with the Federal Highway Administration (FHWA), is developing a project to improve culverts and drainage infrastructure within the Parks Highway corridor between Milepost 99 and 163. Throughout the project corridor, various culverts and drainage infrastructure are exhibiting signs of deterioration including pipe corrosion, drainage channel blockage, inlet and outlet scouring, and other deficiencies. Approximately 200 culverts in the project corridor are anticipated to be evaluated and potentially improved with this project; many were installed more than 50 years ago when the Parks Highway was initially constructed. The Department is focusing on improving the culverts in the most critical condition first.
Project Phasing
The project is being developed in phases for design and construction.
Phase 1: Replace 10 culverts that are in critical condition and pose the most risk to the highway if they fail. The culverts addressed in Phase 1 are shown in green on the adjacent figure. The design process is complete. Phase 1 is under construction.
Phase 2: Replace the existing 144-inch culvert at Railroad Creek (MP 128.5) with a bridge; it is shown in red on the adjacent figure. The design process is complete. Phase 2 is under construction.
Phase 3: Replace 7 failing culverts, 2 of which may result in bridges. The culverts to be addressed in Phase 3 are located South of MP110, shown in yellow on the adjacent figure. Construction may begin in 2027.
Phase 4: Replace 7 failing culverts, 3 of which may result in bridges. The culverts to be addressed in Phase 4 are located North of MP110, shown in purple on the adjacent figure. Construction may begin in 2027.
Future Phases: Additional phases may be added as funding allows.
PROPOSED WORK MAY INCLUDE
- Drainage improvements
- Culvert maintenance, replacement, and new installations
- Bridge construction
- Ditch grading
- Digouts and associated resurfacing
- Guardrail
- Signage
- Utility relocations
- Clearing and grubbing
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Map of Project Area
