US 18 over Winters Lake Overflow
FairClosed to trafficChickasaw County, Iowa · 2.9 Mi. E of Jct. SR T76 · Structure no. 000000000019600
- Built
- 1929
- 96 years old, rebuilt 1964
- Condition
- Fair
- inspected August 2022
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 62 ft
- 1 main span
- Daily traffic
- 2,130
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 over Winters Lake Overflow is a prestressed concrete box beam or girders - multiple carrying US 18 over Winters Lake Overflow in Chickasaw County, Iowa. It was built in 1929 and reconstructed in 1964, so it is 96 years old, older than the Iowa average of 45.5 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: closed to all traffic.
It carries about 2,130 vehicles a day, roughly 18% of them trucks, projected to reach 2,130 by 2042. The structure is 62 ft (18.9 m) long and 36 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 18 over Winters Lake Overflow built?
It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1964.
What condition is US 18 over Winters Lake Overflow 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 August 2022.
How much traffic does US 18 over Winters Lake Overflow carry?
About 2,130 vehicles per day (2022 count), of which roughly 18% are trucks.
How long is US 18 over Winters Lake Overflow?
The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.
Who owns US 18 over Winters Lake Overflow?
It is owned by the State Highway Agency.