FM - 690th over Waterway
PoorCass County, Iowa · 076350304 · Structure no. 000000000099190
- Built
- 1963
- 62 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 144 ft
- 3 main spans
- Daily traffic
- 450
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM - 690th over Waterway is a prestressed concrete stringer/multi-beam or girder carrying FM - 690th over Waterway in Cass County, Iowa. It was built in 1963, so it is 62 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 450 vehicles a day, roughly 24% of them trucks, projected to reach 450 by 2044. The structure is 144 ft (43.9 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 - 690th over Waterway built?
It was built in 1963, making it 62 years old in 2025.
What condition is FM - 690th over Waterway 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 - 690th over Waterway carry?
About 450 vehicles per day (2022 count), of which roughly 24% are trucks.
How long is FM - 690th over Waterway?
The structure is 144 ft (43.9 m) long with a longest span of 59 ft (18 m) and a deck 30 ft wide.
Who owns FM - 690th over Waterway?
It is owned by the County Highway Agency.