WB 20 & NB 17 over R-27
GoodHamilton County, Iowa · 0.8 MI W of E JCT Ia 17 · Structure no. 000000000603682
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 142 ft
- 3 main spans
- Daily traffic
- 5,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
WB 20 & NB 17 over R-27 is a prestressed concrete stringer/multi-beam or girder carrying WB 20 & NB 17 over R-27 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 5,500 vehicles a day, roughly 25% of them trucks, projected to reach 5,500 by 2044. The structure is 142 ft (43.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 WB 20 & NB 17 over R-27 built?
It was built in 1978, making it 47 years old in 2025.
What condition is WB 20 & NB 17 over R-27 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 March 2024.
How much traffic does WB 20 & NB 17 over R-27 carry?
About 5,500 vehicles per day (2022 count), of which roughly 25% are trucks.
How long is WB 20 & NB 17 over R-27?
The structure is 142 ft (43.3 m) long with a longest span of 52 ft (15.9 m) and a deck 43 ft wide.
Who owns WB 20 & NB 17 over R-27?
It is owned by the State Highway Agency.