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County Road 97 over Slough S7

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

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

County Road 97 over Slough S7 in Yolo 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 5 (fair condition) on the 0-9 scale.
It was built in 1930, making it 95 years old at the 2025 inventory.
It carries about 710 vehicles a day (traffic count year 2015).
Its listed owner is the county highway agency.
It is one of 141 of the 274 inventoried bridges in Yolo County rated fair (51.5%); 12 (4.4%) 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

Component	Rating (2025)	FHWA scale meaning
Superstructure	5	Fair condition
Substructure	5	Fair condition


Structure	Continuous concrete deck arch
Length	about 44 ft
Location	0.29 Mi North of CR #15
NBI structure number	22C0138
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Interstate 80 over Enterprise Blvd	1951	145,000	Good
Interstate 80 over County Road 32	1962	135,000	Good
Interstate 80 over Yolo Causeway West	1962	135,000	Good
Interstate 80 over Yolo Causeway East	1963	135,000	Good
Interstate 80 over Bike & Pedestrian Tunnel	2001	128,000	Fair
US Hwy 50 (I-305) over Westacre Rd	1951	90,000	Poor