US 18 over Drainage Ditch
FairHancock County, Iowa · 0.8 MI E of SR R35 · Structure no. 000000000026790
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 108 ft
- 3 main spans
- Daily traffic
- 5,200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 over Drainage Ditch is a prestressed concrete stringer/multi-beam or girder carrying US 18 over Drainage Ditch in Hancock County, Iowa. It was built in 1958, so it is 67 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 5,200 vehicles a day, roughly 15% of them trucks, projected to reach 5,200 by 2044. The structure is 108 ft (32.9 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Drainage Ditch built?
It was built in 1958, making it 67 years old in 2025.
What condition is US 18 over Drainage Ditch 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 2024.
How much traffic does US 18 over Drainage Ditch carry?
About 5,200 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is US 18 over Drainage Ditch?
The structure is 108 ft (32.9 m) long with a longest span of 44 ft (13.4 m) and a deck 36 ft wide.
Who owns US 18 over Drainage Ditch?
It is owned by the State Highway Agency.