US 71 over Lone Tree Creek
GoodCass County, Iowa · 0.1 Mi. S of Jct. SR G35 · Structure no. 000000000017550
- Built
- 1971
- 54 years old, rebuilt 2018
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 311 ft
- 4 main spans
- Daily traffic
- 2,830
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 71 over Lone Tree Creek is a prestressed concrete stringer/multi-beam or girder carrying US 71 over Lone Tree Creek in Cass County, Iowa. It was built in 1971 and reconstructed in 2018, so it is 54 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 2,830 vehicles a day, roughly 15% of them trucks, projected to reach 2,830 by 2044. The structure is 311 ft (94.8 m) long and 47 ft wide. If it were closed, the detour would be 8.1 mi (13 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 71 over Lone Tree Creek built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2018.
What condition is US 71 over Lone Tree Creek 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 October 2024.
How much traffic does US 71 over Lone Tree Creek carry?
About 2,830 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is US 71 over Lone Tree Creek?
The structure is 311 ft (94.8 m) long with a longest span of 105 ft (32 m) and a deck 47 ft wide.
Who owns US 71 over Lone Tree Creek?
It is owned by the State Highway Agency.