Linn-Benton RD over Knapp Creek
FairLinn County, Iowa · 082083108 · Structure no. 000000000220480
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 91 ft
- 3 main spans
- Daily traffic
- 730
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Linn-Benton RD over Knapp Creek is a concrete continuous slab carrying Linn-Benton RD over Knapp Creek in Linn County, Iowa. It was built in 1972, so it is 53 years old, older 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 730 vehicles a day, roughly 14% of them trucks, projected to reach 730 by 2044. The structure is 91 ft (27.7 m) long and 32 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Linn-Benton RD over Knapp Creek built?
It was built in 1972, making it 53 years old in 2025.
What condition is Linn-Benton RD over Knapp 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 Linn-Benton RD over Knapp Creek carry?
About 730 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is Linn-Benton RD over Knapp Creek?
The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.
Who owns Linn-Benton RD over Knapp Creek?
It is owned by the County Highway Agency.