GRANT LINE ROAD
Carrying GRANT LINE ROAD over DELTA-MENDOTA CANAL
1.8 MI NE OF I 580, Alameda, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: GRANT LINE ROAD
The GRANT LINE ROAD bridge in Alameda, California carries GRANT LINE ROAD over DELTA-MENDOTA CANAL. It was built in 1948, making it 78 years old today. The structure is built primarily of concrete continuous and spans 3 sections, stretching 37.5 meters (123 feet) end to end. Daily traffic averages 5,100 vehicles, placing it in the moderately-trafficked tier of California bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 7/9, substructure at 5/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 22.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How GRANT LINE ROAD compares
Live comparison across California.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1948
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 37.5 m (123 ft)
- Deck Width
- 11.0 m (36 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 5,100 vehicles/day
- Structure Number
- 33C0053
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • At 5/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
GRANT LINE ROAD is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare GRANT LINE ROAD against other structures in Alameda and across California. California bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for GRANT LINE ROAD?
GRANT LINE ROAD in Alameda, California has a deck rating of 4/9, superstructure rating of 7/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is GRANT LINE ROAD inspected?
GRANT LINE ROAD's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 5,100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. GRANT LINE ROAD is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for GRANT LINE ROAD?
GRANT LINE ROAD has an NBI inventory load rating of 22.7 metric tons.
Who is responsible for maintaining GRANT LINE ROAD?
GRANT LINE ROAD is owned and maintained by County Highway Agency.
How old is GRANT LINE ROAD and does age affect safety?
GRANT LINE ROAD was built in 1948, making it 78 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.