FM RD R 77 over US 20
GoodHamilton County, Iowa · 2.5 Miles E of JCT I-35 · Structure no. 000000000606185
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 268 ft
- 4 main spans
- Daily traffic
- 290
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
FM RD R 77 over US 20 is a prestressed concrete stringer/multi-beam or girder carrying FM RD R 77 over US 20 in Hamilton County, Iowa. It was built in 1990, so it is 35 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 290 vehicles a day, projected to reach 290 by 2044. The structure is 268 ft (81.7 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 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 FM RD R 77 over US 20 built?
It was built in 1990, making it 35 years old in 2025.
What condition is FM RD R 77 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 April 2024.
How much traffic does FM RD R 77 over US 20 carry?
About 290 vehicles per day (2022 count).
How long is FM RD R 77 over US 20?
The structure is 268 ft (81.7 m) long with a longest span of 92 ft (28 m) and a deck 35 ft wide.
Who owns FM RD R 77 over US 20?
It is owned by the State Highway Agency.