Knappie Road over Angostura Main Canal
FairFall River County, South Dakota · 5.3S & 2.8E Hot Springs · Structure no. 000000024320085
- Built
- 1950
- 75 years old, rebuilt 1989
- Condition
- Fair
- inspected May 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 35 ft
- 1 main span
- Daily traffic
- 15
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Knappie Road over Angostura Main Canal is a prestressed concrete tee beam carrying Knappie Road over Angostura Main Canal in Fall River County, South Dakota. It was built in 1950 and reconstructed in 1989, so it is 75 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 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 15 vehicles a day, roughly 2% of them trucks, projected to reach 15 by 2032. The structure is 35 ft (10.7 m) long and 19 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 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 Knappie Road over Angostura Main Canal built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1989.
What condition is Knappie Road over Angostura Main Canal 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 Knappie Road over Angostura Main Canal carry?
About 15 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Knappie Road over Angostura Main Canal?
The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 19 ft wide.
Who owns Knappie Road over Angostura Main Canal?
It is owned by the County Highway Agency.