487th Ave HWY 103 over Trib to Split Rock Ck
PoorMinnehaha County, South Dakota · 2E & 0.4N Garretson · Structure no. 000000050330086
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected July 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 52 ft
- 1 main span
- Daily traffic
- 398
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
487th Ave HWY 103 over Trib to Split Rock Ck is a prestressed concrete tee beam carrying 487th Ave HWY 103 over Trib to Split Rock Ck in Minnehaha County, South Dakota. It was built in 1977, so it is 48 years old, younger 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 398 vehicles a day, roughly 2% of them trucks, projected to reach 462 by 2038. The structure is 52 ft (15.8 m) long and 32 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 | 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 487th Ave HWY 103 over Trib to Split Rock Ck built?
It was built in 1977, making it 48 years old in 2025.
What condition is 487th Ave HWY 103 over Trib to Split Rock 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 July 2024.
How much traffic does 487th Ave HWY 103 over Trib to Split Rock Ck carry?
About 398 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is 487th Ave HWY 103 over Trib to Split Rock Ck?
The structure is 52 ft (15.8 m) long with a longest span of 50 ft (15.2 m) and a deck 32 ft wide.
Who owns 487th Ave HWY 103 over Trib to Split Rock Ck?
It is owned by the County Highway Agency.