Irr Bia Rte 133 over Turnback Creek
Tuolumne County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 133 over Turnback Creek in Tuolumne County, California, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2020, making it 5 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2021).
- It is one of 45 of the 125 inventoried bridges in Tuolumne County rated good (36.0%); 8 (6.4%) 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 good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (37.98158, -120.23142)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 45 ft |
| Location | 1.48KM UP Miwu From Inter |
| NBI structure number | 0000J51634B0050 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Tuolumne County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mono Way over Sullivan Creek | 1991 | 25,060 | Poor |
| SR 108 over Sullivan Crk / Bergel Rd | 2004 | 20,800 | Fair |
| SR 108 over Hess Avenue | 2004 | 20,800 | Fair |
| SR 108 over Peaceful Oak Rd | 2013 | 20,800 | Good |
| SR 108 over Mono Way | 2013 | 20,800 | Fair |
| State Route 49 over Woods Creek | 1941 | 19,900 | Good |
All bridges nearby: Tuolumne County, CA bridge conditions · every bridge in Tuolumne County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.