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State Route 140 over South Fork Merced River

Mariposa County, California · rated Poor in the 2025 National Bridge Inventory

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

State Route 140 over South Fork Merced River in Mariposa County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1926, making it 99 years old at the 2025 inventory.
It carries about 1,400 vehicles a day (traffic count year 2009).
Its listed owner is the state highway agency.
It is one of 12 of the 109 inventoried bridges in Mariposa County rated poor (11.0%); 12 (11.0%) 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.

Component ratings

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

Bridge	Built	Vehicles/day	Condition
State Route 140 over Mariposa Creek	1932	10,800	Fair
State Route 49 over Stockton Creek	1967	7,900	Fair
State Route 49 over Mariposa Creek	1942	6,600	Fair
State Route 140 over Miles Creek	1916	4,650	Fair
State Route 140 over Miles Creek	1929	4,650	Fair
State Route 140 over Miles Creek	1928	4,650	Fair