Main Prairie Rd over Ulatis Creek
Solano County, California · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Main Prairie Rd over Ulatis Creek in Solano County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 1 (imminent failure condition) on the 0-9 scale.
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 255 vehicles a day (traffic count year 2003).
- Its listed owner is the county highway agency.
- It is one of 24 of the 374 inventoried bridges in Solano County rated poor (6.4%); 24 (6.4%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (38.32943, -121.81373)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 1 | Imminent failure condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 129 ft |
| Location | 0.3 Mi E of Rte 113 |
| NBI structure number | 23C0118 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Solano County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 80 over Dan Wilson Creek | 1951 | 202,000 | Fair |
| Interstate 80 over Suisun Creek | 1932 | 202,000 | Poor |
| Interstate 80 over Green Valley Creek | 1928 | 189,000 | Poor |
| Interstate 80 over Pedestrian Walkway | 1961 | 177,000 | Good |
| Interstate 80 over Alamo Creek | 1936 | 147,000 | Poor |
| Interstate 80 over Interstate 780 | 1958 | 145,000 | Good |
All bridges nearby: Solano County, CA bridge conditions · every bridge in Solano County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.