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N Big Trees Prk Rd over San Lorenzo River

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

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

N Big Trees Prk Rd over San Lorenzo River in Santa Cruz County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1931, making it 94 years old at the 2025 inventory.
It carries about 500 vehicles a day (traffic count year 2016).
It is one of 32 of the 194 inventoried bridges in Santa Cruz County rated poor (16.5%); 32 (16.5%) 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


Structure	Continuous concrete girder and floorbeam
Length	about 145 ft
Location	H Cowell St Pk
NBI structure number	36P0013
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
State Route 1 over Emeline Street	2008	130,000	Fair
Water Street over Branciforte Creek	1924	100,000	Fair
State Route 1 over Soquel Creek Wharf Rd	1947	97,000	Good
State Route 1 over Bay Avenue	1995	97,000	Good
State Route 1 over Market Street	1958	88,000	Good
State Route 1 over Branciforte Creek	1958	88,000	Good