Wallis Ranch Drive over Tassajara Creek
Alameda County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Wallis Ranch Drive over Tassajara Creek in Alameda County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2016, making it 9 years old at the 2025 inventory.
- It carries about 1,000 vehicles a day (traffic count year 2022).
- Its listed owner is a city or municipal highway agency.
- It is one of 356 of the 662 inventoried bridges in Alameda County rated fair (53.8%); 42 (6.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (37.73064, -121.87231)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 202 ft |
| Location | NW of Tassajara Rd |
| NBI structure number | 33C0493 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Alameda County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 80 over Gilman Street | 1955 | 550,000 | Good |
| Interstate 80 over Powell Street | 1954 | 531,000 | Good |
| Interstate 80 over Buried Walkway | 1954 | 531,000 | Fair |
| Interstate 80 over Temescal Creek | 1936 | 288,000 | Good |
| Interstate 580 over Maple Ave | 1963 | 274,000 | Fair |
| Interstate 80 WB over UP BNSF Amtrak E80-w580 | 1960 | 271,000 | Good |
All bridges nearby: Alameda County, CA bridge conditions · every bridge in Alameda County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.