Ia 17 over US 20
GoodHamilton County, Iowa · At North JCT With US 20 · Structure no. 000000000603670
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 258 ft
- 4 main spans
- Daily traffic
- 650
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 17 over US 20 is a prestressed concrete stringer/multi-beam or girder carrying Ia 17 over US 20 in Hamilton County, Iowa. It was built in 1978, so it is 47 years old, older 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 650 vehicles a day, roughly 32% of them trucks, projected to reach 650 by 2043. The structure is 258 ft (78.6 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 17 over US 20 built?
It was built in 1978, making it 47 years old in 2025.
What condition is Ia 17 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 June 2023.
How much traffic does Ia 17 over US 20 carry?
About 650 vehicles per day (2022 count), of which roughly 32% are trucks.
How long is Ia 17 over US 20?
The structure is 258 ft (78.6 m) long with a longest span of 92 ft (28 m) and a deck 35 ft wide.
Who owns Ia 17 over US 20?
It is owned by the State Highway Agency.