US Bridges

U.S. Highway 395 over California Aqueduct

Fair

San Bernardino County, California · 08-SBD-395-6.83 · Structure no. 54 0829

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
106 ft
1 main span
Daily traffic
29,000
2021 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 395 over California Aqueduct is a concrete box beam or girders - multiple carrying U.S. Highway 395 over California Aqueduct in San Bernardino County, California. It was built in 1968, so it is 57 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 29,000 vehicles a day, roughly 22% of them trucks, projected to reach 38,000 by 2045. The structure is 106 ft (32.3 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesU.S. Highway 395
CrossesCalifornia Aqueduct
Location08-SBD-395-6.83
RouteU.S. Route 395
CountySan Bernardino County
StateCalifornia
Coordinates34.44307, -117.39948
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating46.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span105 ft (32 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2021)
Projected traffic38,000 by 2045
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 U.S. Highway 395 over California Aqueduct built?

It was built in 1968, making it 57 years old in 2025.

What condition is U.S. Highway 395 over California Aqueduct in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does U.S. Highway 395 over California Aqueduct carry?

About 29,000 vehicles per day (2021 count), of which roughly 22% are trucks.

How long is U.S. Highway 395 over California Aqueduct?

The structure is 106 ft (32.3 m) long with a longest span of 105 ft (32 m) and a deck 42 ft wide.

Who owns U.S. Highway 395 over California Aqueduct?

It is owned by the State Highway Agency.