A26 (180th St) over Big Sioux River
PoorLyon County, Iowa · 099482103 · Structure no. 000000000230665
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 402 ft
- 5 main spans
- Daily traffic
- 1,017
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
A26 (180th St) over Big Sioux River is a steel continuous stringer/multi-beam or girder carrying A26 (180th St) over Big Sioux River in Lyon County, Iowa. It was built in 1977, so it is 48 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 1,017 vehicles a day, roughly 11% of them trucks, projected to reach 1,017 by 2043. The structure is 402 ft (122.5 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was A26 (180th St) over Big Sioux River built?
It was built in 1977, making it 48 years old in 2025.
What condition is A26 (180th St) over Big Sioux River 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 July 2023.
How much traffic does A26 (180th St) over Big Sioux River carry?
About 1,017 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is A26 (180th St) over Big Sioux River?
The structure is 402 ft (122.5 m) long with a longest span of 88 ft (26.8 m) and a deck 32 ft wide.
Who owns A26 (180th St) over Big Sioux River?
It is owned by the County Highway Agency.