Highway S-74 S over Carson Creek
PoorJasper County, Iowa · 078190303 · Structure no. 000000000195590
- Built
- 1964
- 61 years old
- Condition
- Poor
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 103 ft
- 3 main spans
- Daily traffic
- 810
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Highway S-74 S over Carson Creek is a concrete continuous slab carrying Highway S-74 S over Carson Creek in Jasper County, Iowa. It was built in 1964, so it is 61 years old, older than the Iowa average of 45.5 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 810 vehicles a day, roughly 5% of them trucks, projected to reach 810 by 2043. The structure is 103 ft (31.4 m) long and 30 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Highway S-74 S over Carson Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is Highway S-74 S over Carson 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 April 2023.
How much traffic does Highway S-74 S over Carson Creek carry?
About 810 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Highway S-74 S over Carson Creek?
The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 30 ft wide.
Who owns Highway S-74 S over Carson Creek?
It is owned by the County Highway Agency.