Upper Boulder R over Silver Creek
FairLinn County, Iowa · 086051401 · Structure no. 000000000364050
- Built
- 1998
- 27 years old
- Condition
- Fair
- inspected September 2024
- Type
- Slab
- Wood or Timber
- Length
- 24 ft
- 1 main span
- Daily traffic
- 11
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Upper Boulder R over Silver Creek is a wood or timber slab carrying Upper Boulder R over Silver Creek in Linn County, Iowa. It was built in 1998, so it is 27 years old, younger than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 11 vehicles a day, projected to reach 11 by 2044. The structure is 24 ft (7.3 m) long and 26 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Upper Boulder R over Silver Creek built?
It was built in 1998, making it 27 years old in 2025.
What condition is Upper Boulder R over Silver Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.
How much traffic does Upper Boulder R over Silver Creek carry?
About 11 vehicles per day (2022 count).
How long is Upper Boulder R over Silver Creek?
The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 26 ft wide.
Who owns Upper Boulder R over Silver Creek?
It is owned by the County Highway Agency.