S 56 over US 20
GoodHardin County, Iowa · At Junction With SR S56 · Structure no. 000000000607890
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 304 ft
- 2 main spans
- Daily traffic
- 1,453
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
S 56 over US 20 is a steel stringer/multi-beam or girder carrying S 56 over US 20 in Hardin County, Iowa. It was built in 2003, so it is 22 years old, younger than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,453 vehicles a day, roughly 16% of them trucks, projected to reach 1,453 by 2042. The structure is 304 ft (92.7 m) long and 39 ft wide. If it were closed, the detour would be 14.3 mi (23 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 56 over US 20 built?
It was built in 2003, making it 22 years old in 2025.
What condition is S 56 over US 20 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.
How much traffic does S 56 over US 20 carry?
About 1,453 vehicles per day (2022 count), of which roughly 16% are trucks.
How long is S 56 over US 20?
The structure is 304 ft (92.7 m) long with a longest span of 153 ft (46.6 m) and a deck 39 ft wide.
Who owns S 56 over US 20?
It is owned by the State Highway Agency.