WB US 20 over Des Moines River
FairWebster County, Iowa · 2.6 Mi. E of US 169 · Structure no. 000000000606090
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 676 ft
- 5 main spans
- Daily traffic
- 4,300
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
WB US 20 over Des Moines River is a steel continuous stringer/multi-beam or girder carrying WB US 20 over Des Moines River in Webster County, Iowa. It was built in 1990, so it is 35 years old, younger 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 5 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 4,300 vehicles a day, roughly 29% of them trucks, projected to reach 4,300 by 2044. The structure is 676 ft (206 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 WB US 20 over Des Moines River built?
It was built in 1990, making it 35 years old in 2025.
What condition is WB US 20 over Des Moines River 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 May 2024.
How much traffic does WB US 20 over Des Moines River carry?
About 4,300 vehicles per day (2022 count), of which roughly 29% are trucks.
How long is WB US 20 over Des Moines River?
The structure is 676 ft (206 m) long with a longest span of 147 ft (44.8 m) and a deck 43 ft wide.
Who owns WB US 20 over Des Moines River?
It is owned by the State Highway Agency.