Manthey Road over Walker Slough
PoorSan Joaquin County, California · 1/4 MI N Downing Av · Structure no. 29C0400
- Built
- 1971
- 54 years old
- Condition
- Poor
- inspected February 2025
- Type
- Slab
- Concrete Continuous
- Length
- 118 ft
- 5 main spans
- Daily traffic
- 4,600
- 2017 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Manthey Road over Walker Slough is a concrete continuous slab carrying Manthey Road over Walker Slough in San Joaquin County, California. It was built in 1971, so it is 54 years old, younger than the California average of 54.8 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 4,600 vehicles a day, roughly 20% of them trucks, projected to reach 8,636 by 2045. The structure is 118 ft (36 m) long and 43 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Manthey Road over Walker Slough built?
It was built in 1971, making it 54 years old in 2025.
What condition is Manthey Road over Walker Slough 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 February 2025.
How much traffic does Manthey Road over Walker Slough carry?
About 4,600 vehicles per day (2017 count), of which roughly 20% are trucks.
How long is Manthey Road over Walker Slough?
The structure is 118 ft (36 m) long with a longest span of 26 ft (7.9 m) and a deck 43 ft wide.
Who owns Manthey Road over Walker Slough?
It is owned by the City or Municipal Highway Agency.