US Bridges

US Highway 395 over Los Angeles Aqueduct

Good

Inyo County, California · 09-INY-395-31.28 · Structure no. 48 0010

Built
1928
97 years old, rebuilt 1953
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
1 main span
Daily traffic
12,600
2019 count
Owner
State
State Highway Agency

About this bridge

US Highway 395 over Los Angeles Aqueduct is a steel stringer/multi-beam or girder carrying US Highway 395 over Los Angeles Aqueduct in Inyo County, California. It was built in 1928 and reconstructed in 1953, so it is 97 years old, older 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 12,600 vehicles a day, roughly 12% of them trucks, projected to reach 15,170 by 2041. The structure is 48 ft (14.6 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS Highway 395
CrossesLos Angeles Aqueduct
Location09-INY-395-31.28
RouteU.S. Route 395
Coordinates36.23637, -117.98398
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating32.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span45 ft (13.7 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,600 (2019)
Projected traffic15,170 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US Highway 395 over Los Angeles Aqueduct built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1953.

What condition is US Highway 395 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 2024.

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

About 12,600 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is US Highway 395 over Los Angeles Aqueduct?

The structure is 48 ft (14.6 m) long with a longest span of 45 ft (13.7 m) and a deck 43 ft wide.

Who owns US Highway 395 over Los Angeles Aqueduct?

It is owned by the State Highway Agency.