38580 300th Street over Marty Mission Spillway
FairPosted for loadCharles Mix County, South Dakota · 6.9S & 2.2W of Ravina · Structure no. 000000012418319
- Built
- 1937
- 88 years old, rebuilt 1985
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 32 ft
- 1 main span
- Daily traffic
- 48
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
38580 300th Street over Marty Mission Spillway is a steel stringer/multi-beam or girder carrying 38580 300th Street over Marty Mission Spillway in Charles Mix County, South Dakota. It was built in 1937 and reconstructed in 1985, so it is 88 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. Its operating status is: posted for load restriction.
It carries about 48 vehicles a day, roughly 2% of them trucks, projected to reach 48 by 2032. The structure is 32 ft (9.8 m) long and 24 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 | 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 38580 300th Street over Marty Mission Spillway built?
It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1985.
What condition is 38580 300th Street over Marty Mission Spillway 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 October 2023.
How much traffic does 38580 300th Street over Marty Mission Spillway carry?
About 48 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 38580 300th Street over Marty Mission Spillway?
The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.
Who owns 38580 300th Street over Marty Mission Spillway?
It is owned by the County Highway Agency.