484th Ave HWY 109 over Split Rock Creek
PoorMinnehaha County, South Dakota · 1W & 2.8S Garretson · Structure no. 000000050300118
- Built
- 1974
- 51 years old
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 256 ft
- 3 main spans
- Daily traffic
- 448
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
484th Ave HWY 109 over Split Rock Creek is a steel continuous stringer/multi-beam or girder carrying 484th Ave HWY 109 over Split Rock Creek in Minnehaha County, South Dakota. It was built in 1974, so it is 51 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.
It carries about 448 vehicles a day, roughly 2% of them trucks, projected to reach 520 by 2038. The structure is 256 ft (77.9 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Split Rock Creek built?
It was built in 1974, making it 51 years old in 2025.
What condition is 484th Ave HWY 109 over Split Rock 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 July 2024.
How much traffic does 484th Ave HWY 109 over Split Rock Creek carry?
About 448 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is 484th Ave HWY 109 over Split Rock Creek?
The structure is 256 ft (77.9 m) long with a longest span of 98 ft (29.9 m) and a deck 35 ft wide.
Who owns 484th Ave HWY 109 over Split Rock Creek?
It is owned by the County Highway Agency.