Diamond Street over Mormon Slough
PoorSan Joaquin County, California · 0.1 MI N of DR Mlk Jr Bl · Structure no. 29C0238
- Built
- 1960
- 65 years old
- Condition
- Poor
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 93 ft
- 5 main spans
- Daily traffic
- 2,164
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Diamond Street over Mormon Slough is a concrete continuous slab carrying Diamond Street over Mormon Slough in San Joaquin County, California. It was built in 1960, so it is 65 years old, older 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 2,164 vehicles a day, roughly 10% of them trucks, projected to reach 3,855 by 2045. The structure is 93 ft (28.3 m) long and 66 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 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Diamond Street over Mormon Slough built?
It was built in 1960, making it 65 years old in 2025.
What condition is Diamond Street over Mormon 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 January 2025.
How much traffic does Diamond Street over Mormon Slough carry?
About 2,164 vehicles per day (2019 count), of which roughly 10% are trucks.
How long is Diamond Street over Mormon Slough?
The structure is 93 ft (28.3 m) long with a longest span of 21 ft (6.4 m) and a deck 66 ft wide.
Who owns Diamond Street over Mormon Slough?
It is owned by the City or Municipal Highway Agency.