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State Highway 41 over South Fork Merced River

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

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

State Highway 41 over South Fork Merced River in Mariposa County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2007, making it 18 years old at the 2025 inventory.
It carries about 2,403 vehicles a day (traffic count year 2022).
It is one of 77 of the 109 inventoried bridges in Mariposa County rated fair (70.6%); 12 (11.0%) are rated poor.
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.

Component ratings


Structure	Prestressed concrete single box beam
Length	about 153 ft
Location	0.1 mile south from Range
NBI structure number	8800038P0000000
Condition class	Fair

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