SD1804 over Oahe Reservoir Lk
FairCampbell County, South Dakota · 2.7 NW of Pollock · Structure no. 000000011074020
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected January 2025
- Type
- Culvert
- Concrete Continuous
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 147
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD1804 over Oahe Reservoir Lk is a concrete continuous culvert carrying SD1804 over Oahe Reservoir Lk in Campbell County, South Dakota. It was built in 1980, so it is 45 years old, younger 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 147 vehicles a day, roughly 18% of them trucks, projected to reach 179 by 2044. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 1.9 mi (3 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD1804 over Oahe Reservoir Lk built?
It was built in 1980, making it 45 years old in 2025.
What condition is SD1804 over Oahe Reservoir Lk 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 January 2025.
How much traffic does SD1804 over Oahe Reservoir Lk carry?
About 147 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is SD1804 over Oahe Reservoir Lk?
The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).
Who owns SD1804 over Oahe Reservoir Lk?
It is owned by the State Highway Agency.