Iowa ST over Mission Zanja
GoodSan Bernardino County, California · 0.5 MI N Barton RD · Structure no. 54C0427
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected September 2024
- Type
- Culvert
- Concrete
- Length
- 32 ft
- 2 main spans
- Daily traffic
- 200
- 2015 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Iowa ST over Mission Zanja is a concrete culvert carrying Iowa ST over Mission Zanja in San Bernardino County, California. It was built in 1964, so it is 61 years old, older than the California average of 54.8 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 225 by 2045. The structure is 32 ft (9.8 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Iowa ST over Mission Zanja built?
It was built in 1964, making it 61 years old in 2025.
What condition is Iowa ST over Mission Zanja 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 September 2024.
How much traffic does Iowa ST over Mission Zanja carry?
About 200 vehicles per day (2015 count), of which roughly 1% are trucks.
How long is Iowa ST over Mission Zanja?
The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.6 m) and a deck 46 ft wide.
Who owns Iowa ST over Mission Zanja?
It is owned by the City or Municipal Highway Agency.