Ramp Br D-4 over City ST Row
GoodLinn County, Iowa · 0.3 Mi. N of JCT 922 · Structure no. 000000000603940
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 55 ft
- 1 main span
- Daily traffic
- 7,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ramp Br D-4 over City ST Row is a steel continuous stringer/multi-beam or girder carrying Ramp Br D-4 over City ST Row in Linn County, Iowa. It was built in 1979, so it is 46 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 7,500 vehicles a day, roughly 4% of them trucks, projected to reach 7,500 by 2044. The structure is 55 ft (16.8 m) long and 21 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ramp Br D-4 over City ST Row built?
It was built in 1979, making it 46 years old in 2025.
What condition is Ramp Br D-4 over City ST Row 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 November 2024.
How much traffic does Ramp Br D-4 over City ST Row carry?
About 7,500 vehicles per day (2022 count), of which roughly 4% are trucks.
How long is Ramp Br D-4 over City ST Row?
The structure is 55 ft (16.8 m) long with a longest span of 54 ft (16.5 m) and a deck 21 ft wide.
Who owns Ramp Br D-4 over City ST Row?
It is owned by the State Highway Agency.