IRR BIA RTE 46 over Sub Agency Ditch
FairFremont County, Wyoming · 14.5 KM SW of Riverton · Structure no. 00000000000C814
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected May 2024
- Type
- Channel Beam
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 300
- 2024 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 46 over Sub Agency Ditch is a concrete channel beam carrying IRR BIA RTE 46 over Sub Agency Ditch in Fremont County, Wyoming. It was built in 1970, so it is 55 years old, older than the Wyoming average of 48.4 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 300 vehicles a day, roughly 12% of them trucks, projected to reach 350 by 2044. The structure is 32 ft (9.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 46 over Sub Agency Ditch built?
It was built in 1970, making it 55 years old in 2025.
What condition is IRR BIA RTE 46 over Sub Agency Ditch 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 May 2024.
How much traffic does IRR BIA RTE 46 over Sub Agency Ditch carry?
About 300 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is IRR BIA RTE 46 over Sub Agency Ditch?
The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.
Who owns IRR BIA RTE 46 over Sub Agency Ditch?
It is owned by the Bureau of Indian Affairs.