State Route 120 over South Fork Tuolumne Riv

Tuolumne County, California · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• State Route 120 over South Fork Tuolumne Riv in Tuolumne County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
• It was built in 1962 and reconstructed in 1999, making it 63 years old at the 2025 inventory.
• It carries about 3,650 vehicles a day (traffic count year 2009).
• Its listed owner is the state highway agency.
• 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 class is unchanged from 2024 (good), but component ratings moved: superstructure 7 to 8.
• Its most recent inspection on record is dated September 2023, on a 24-month routine inspection cycle.
• It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
• 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 → (37.82291, -120.01414)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.

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Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.