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State Route 29 over Martin Street

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

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

State Route 29 over Martin Street in Lake County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 6,725 vehicles a day (traffic count year 2009).
Its listed owner is the state highway agency.
It is one of 79 of the 131 inventoried bridges in Lake County rated fair (60.3%); 12 (9.2%) 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 multiple box beam
Length	about 131 ft
Location	01-lak-029-r42.00
NBI structure number	14 0069L
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 53 over Seigler Creek	1952	16,500	Fair
State Route 29 over Kelsey Creek	1966	12,100	Good
State Route 29 over Adobe Creek	1966	12,100	Good
State Route 29 over Hill Creek	1966	12,100	Good
State Route 29 over Manning Creek	1966	12,100	Good
State Route 29 over Putah Creek	2003	10,900	Good