485th Avenue over Ck
PoorPosted for loadBrookings County, South Dakota · 1.5N & 7E White · Structure no. 000000006310059
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 36 ft
- 2 main spans
- Daily traffic
- 139
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
485th Avenue over Ck is a wood or timber stringer/multi-beam or girder carrying 485th Avenue over Ck in Brookings County, South Dakota. It was built in 1950, 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 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 139 vehicles a day, roughly 2% of them trucks, projected to reach 139 by 2032. The structure is 36 ft (11 m) long and 26 ft wide. If it were closed, the detour would be 4.3 mi (7 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 485th Avenue over Ck built?
It was built in 1950, making it 75 years old in 2025.
What condition is 485th 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 2023.
How much traffic does 485th Avenue over Ck carry?
About 139 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 485th Avenue over Ck?
The structure is 36 ft (11 m) long with a longest span of 17 ft (5.3 m) and a deck 26 ft wide.
Who owns 485th Avenue over Ck?
It is owned by the County Highway Agency.