SD1804 over Cheyenne Ck
FairPotter County, South Dakota · 3.7 N JCT US 212 · Structure no. 000000054091126
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 146 ft
- 4 main spans
- Daily traffic
- 194
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD1804 over Cheyenne Ck is a concrete continuous slab carrying SD1804 over Cheyenne Ck in Potter County, South Dakota. It was built in 1969, so it is 56 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.
It carries about 194 vehicles a day, roughly 9% of them trucks, projected to reach 256 by 2044. The structure is 146 ft (44.5 m) long and 35 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 | 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD1804 over Cheyenne Ck built?
It was built in 1969, making it 56 years old in 2025.
What condition is SD1804 over Cheyenne Ck 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 August 2024.
How much traffic does SD1804 over Cheyenne Ck carry?
About 194 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is SD1804 over Cheyenne Ck?
The structure is 146 ft (44.5 m) long with a longest span of 38 ft (11.5 m) and a deck 35 ft wide.
Who owns SD1804 over Cheyenne Ck?
It is owned by the State Highway Agency.