Richardson Highway over Little Tonsina River
FairCounty 066, Alaska · Mile Point 65 · Structure no. 4143
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected August 2023
- Type
- Culvert
- Steel
- Length
- 23 ft
- 2 main spans
- Daily traffic
- 400
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Richardson Highway over Little Tonsina River is a steel culvert carrying Richardson Highway over Little Tonsina River in County 066, Alaska. It was built in 1964, so it is 61 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 400 vehicles a day, roughly 33% of them trucks, projected to reach 470 by 2039. The structure is 23 ft (6.9 m) long. 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Richardson Highway over Little Tonsina River built?
It was built in 1964, making it 61 years old in 2025.
What condition is Richardson Highway over Little Tonsina River 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 August 2023.
How much traffic does Richardson Highway over Little Tonsina River carry?
About 400 vehicles per day (2020 count), of which roughly 33% are trucks.
How long is Richardson Highway over Little Tonsina River?
The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3 m).
Who owns Richardson Highway over Little Tonsina River?
It is owned by the State Highway Agency.