Grant Line Road over Delta-Mendota Canal
PoorAlameda County, California · 1.8 MI NE of I 580 · Structure no. 33C0053
- Built
- 1948
- 77 years old
- Condition
- Poor
- inspected November 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 123 ft
- 3 main spans
- Daily traffic
- 5,100
- 2014 count
- Owner
- County
- County Highway Agency
About this bridge
Grant Line Road over Delta-Mendota Canal is a concrete continuous tee beam carrying Grant Line Road over Delta-Mendota Canal in Alameda County, California. It was built in 1948, so it is 77 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 5,100 vehicles a day, roughly 25% of them trucks, projected to reach 13,081 by 2041. The structure is 123 ft (37.5 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Grant Line Road over Delta-Mendota Canal built?
It was built in 1948, making it 77 years old in 2025.
What condition is Grant Line Road over Delta-Mendota Canal 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 November 2023.
How much traffic does Grant Line Road over Delta-Mendota Canal carry?
About 5,100 vehicles per day (2014 count), of which roughly 25% are trucks.
How long is Grant Line Road over Delta-Mendota Canal?
The structure is 123 ft (37.5 m) long with a longest span of 46 ft (13.9 m) and a deck 36 ft wide.
Who owns Grant Line Road over Delta-Mendota Canal?
It is owned by the County Highway Agency.