FM - 660th over Lone Tree Creek
PoorCass County, Iowa · 075350602 · Structure no. 000000000098090
- Built
- 1900
- 125 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 57 ft
- 1 main span
- Daily traffic
- 29
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM - 660th over Lone Tree Creek is a prestressed concrete stringer/multi-beam or girder carrying FM - 660th over Lone Tree Creek in Cass County, Iowa. It was built in 1900, so it is 125 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 29 vehicles a day, projected to reach 29 by 2044. The structure is 57 ft (17.4 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM - 660th over Lone Tree Creek built?
It was built in 1900, making it 125 years old in 2025.
What condition is FM - 660th over Lone Tree Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.
How much traffic does FM - 660th over Lone Tree Creek carry?
About 29 vehicles per day (2022 count).
How long is FM - 660th over Lone Tree Creek?
The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 22 ft wide.
Who owns FM - 660th over Lone Tree Creek?
It is owned by the County Highway Agency.