Richardson Highway over Sourdough Creek
FairCounty 066, Alaska · Mile Point 150.5 · Structure no. 0575
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected July 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 100 ft
- 1 main span
- Daily traffic
- 330
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Richardson Highway over Sourdough Creek is a prestressed concrete tee beam carrying Richardson Highway over Sourdough Creek in County 066, Alaska. It was built in 1987, so it is 38 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 330 vehicles a day, roughly 22% of them trucks, projected to reach 310 by 2039. The structure is 100 ft (30.5 m) long and 37 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 | 8 Very Good | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Richardson Highway over Sourdough Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is Richardson Highway over Sourdough Creek 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 2023.
How much traffic does Richardson Highway over Sourdough Creek carry?
About 330 vehicles per day (2020 count), of which roughly 22% are trucks.
How long is Richardson Highway over Sourdough Creek?
The structure is 100 ft (30.5 m) long with a longest span of 98 ft (30 m) and a deck 37 ft wide.
Who owns Richardson Highway over Sourdough Creek?
It is owned by the State Highway Agency.