484th Ave HWY 109 over Four Mile Creek
FairMinnehaha County, South Dakota · 3W & 2.3S Valley Springs · Structure no. 000000050300203
- Built
- 1962
- 63 years old, rebuilt 2006
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Concrete Continuous
- Length
- 117 ft
- 5 main spans
- Daily traffic
- 1,513
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
484th Ave HWY 109 over Four Mile Creek is a concrete continuous slab carrying 484th Ave HWY 109 over Four Mile Creek in Minnehaha County, South Dakota. It was built in 1962 and reconstructed in 2006, so it is 63 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 1,513 vehicles a day, roughly 3% of them trucks, projected to reach 1,756 by 2038. The structure is 117 ft (35.8 m) long and 34 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 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 484th Ave HWY 109 over Four Mile Creek built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2006.
What condition is 484th Ave HWY 109 over Four Mile Creek 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 June 2024.
How much traffic does 484th Ave HWY 109 over Four Mile Creek carry?
About 1,513 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is 484th Ave HWY 109 over Four Mile Creek?
The structure is 117 ft (35.8 m) long with a longest span of 25 ft (7.6 m) and a deck 34 ft wide.
Who owns 484th Ave HWY 109 over Four Mile Creek?
It is owned by the County Highway Agency.