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Whitney Portal Rd over Los Angeles Aqueduct

Inyo County, California · rated Good in the 2025 National Bridge Inventory

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

Whitney Portal Rd over Los Angeles Aqueduct in Inyo County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1958, making it 67 years old at the 2025 inventory.
It carries about 1,224 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 46 of the 69 inventoried bridges in Inyo County rated good (66.7%); 2 (2.9%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 41 ft
Location	0.6 Mi W of Rte 395 Jct
NBI structure number	48C0009
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
U.S. Highway 395 over North Fork Bishop Creek	1971	21,550	Fair
U.S. Highway 395 over Bishop Crk Overflow Chnl	1985	21,550	Good
U.S. Highway 395 over Lower Rock Creek	1975	15,000	Good
US Highway 395 over Big Pine Creek	1993	13,500	Good
US Highway 395 over Los Angeles Aqueduct	1928	12,600	Good
State Route 168 over Owens River	1974	8,820	Good