Parks Highway over Bison Gulch
FairDenali Borough, Alaska · Mile Point 208.0 · Structure no. 1142
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 148 ft
- 2 main spans
- Daily traffic
- 1,380
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Parks Highway over Bison Gulch is a steel stringer/multi-beam or girder carrying Parks Highway over Bison Gulch in Denali Borough, Alaska. It was built in 1969, so it is 56 years old, older than the Alaska average of 35.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 1,380 vehicles a day, roughly 7% of them trucks, projected to reach 2,100 by 2039. The structure is 148 ft (45 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Parks Highway over Bison Gulch built?
It was built in 1969, making it 56 years old in 2025.
What condition is Parks Highway over Bison Gulch in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does Parks Highway over Bison Gulch carry?
About 1,380 vehicles per day (2020 count), of which roughly 7% are trucks.
How long is Parks Highway over Bison Gulch?
The structure is 148 ft (45 m) long with a longest span of 72 ft (21.8 m) and a deck 34 ft wide.
Who owns Parks Highway over Bison Gulch?
It is owned by the State Highway Agency.