475 Avenue over Ck
PoorPosted for loadGrant County, South Dakota · 3W & 0.9S Milbank · Structure no. 000000026260079
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 53 ft
- 1 main span
- Daily traffic
- 75
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
475 Avenue over Ck is a steel stringer/multi-beam or girder carrying 475 Avenue over Ck in Grant County, South Dakota. It was built in 1965, so it is 60 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 75 vehicles a day, roughly 2% of them trucks, projected to reach 75 by 2032. The structure is 53 ft (16.2 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 475 Avenue over Ck built?
It was built in 1965, making it 60 years old in 2025.
What condition is 475 Avenue over Ck in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does 475 Avenue over Ck carry?
About 75 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 475 Avenue over Ck?
The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 27 ft wide.
Who owns 475 Avenue over Ck?
It is owned by the County Highway Agency.