IRR BIA RTE 7 over Moreau River
FairPosted for loadDewey County, South Dakota · .7 KM North of Promise · Structure no. 00000000000A143
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 418 ft
- 6 main spans
- Daily traffic
- 105
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 7 over Moreau River is a steel stringer/multi-beam or girder carrying IRR BIA RTE 7 over Moreau River in Dewey County, South Dakota. It was built in 1961, so it is 64 years old, older than the South Dakota average of 48.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 105 vehicles a day, roughly 5% of them trucks, projected to reach 133 by 2043. The structure is 418 ft (127.4 m) long and 27 ft wide. If it were closed, the detour would be 37.9 mi (61 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 7 over Moreau River built?
It was built in 1961, making it 64 years old in 2025.
What condition is IRR BIA RTE 7 over Moreau 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 May 2023.
How much traffic does IRR BIA RTE 7 over Moreau River carry?
About 105 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is IRR BIA RTE 7 over Moreau River?
The structure is 418 ft (127.4 m) long with a longest span of 70 ft (21.2 m) and a deck 27 ft wide.
Who owns IRR BIA RTE 7 over Moreau River?
It is owned by the Bureau of Indian Affairs.