476th Avenue over Nine Mile Creek
PoorPosted for loadLincoln County, South Dakota · 1.2S of Harrisburg · Structure no. 000000042120062
- Built
- 1971
- 54 years old
- Condition
- Poor
- inspected June 2024
- Type
- Channel Beam
- Concrete
- Length
- 36 ft
- 1 main span
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
476th Avenue over Nine Mile Creek is a concrete channel beam carrying 476th Avenue over Nine Mile Creek in Lincoln County, South Dakota. It was built in 1971, so it is 54 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 75 by 2032. The structure is 36 ft (11 m) long and 26 ft wide. 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 476th Avenue over Nine Mile Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is 476th Avenue over Nine Mile Creek 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 June 2024.
How much traffic does 476th Avenue over Nine Mile Creek carry?
About 45 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 476th Avenue over Nine Mile Creek?
The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 26 ft wide.
Who owns 476th Avenue over Nine Mile Creek?
It is owned by the County Highway Agency.