US Bridges

US Highway 395 SB over Los Angeles Aqueduct

Good

Inyo County, California · 09-INY-395-R21.31 · Structure no. 48 0015L

Built
1979
46 years old
Condition
Good
inspected September 2022
Type
Slab
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
6,400
2019 count
Owner
State
State Highway Agency

About this bridge

US Highway 395 SB over Los Angeles Aqueduct is a prestressed concrete slab carrying US Highway 395 SB over Los Angeles Aqueduct in Inyo County, California. It was built in 1979, so it is 46 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,400 vehicles a day, roughly 12% of them trucks, projected to reach 7,650 by 2040. The structure is 34 ft (10.4 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Highway 395 SB
CrossesLos Angeles Aqueduct
Location09-INY-395-R21.31
RouteU.S. Route 395
Coordinates36.09379, -117.96382
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2019)
Projected traffic7,650 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US Highway 395 SB over Los Angeles Aqueduct built?

It was built in 1979, making it 46 years old in 2025.

What condition is US Highway 395 SB over Los Angeles Aqueduct in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

How much traffic does US Highway 395 SB over Los Angeles Aqueduct carry?

About 6,400 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is US Highway 395 SB over Los Angeles Aqueduct?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 44 ft wide.

Who owns US Highway 395 SB over Los Angeles Aqueduct?

It is owned by the State Highway Agency.