US Bridges

Maple Ave over California Aqueduct

Fair

San Bernardino County, California · 1.8 MI S of Main ST · Structure no. 54C0452

Built
1971
54 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
156 ft
2 main spans
Daily traffic
3,300
2016 count
Owner
Local
Other Local Agency

About this bridge

Maple Ave over California Aqueduct is a prestressed concrete stringer/multi-beam or girder carrying Maple Ave over California Aqueduct in San Bernardino County, California. It was built in 1971, so it is 54 years old, younger 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 3,300 vehicles a day, roughly 2% of them trucks, projected to reach 4,581 by 2044. The structure is 156 ft (47.4 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMaple Ave
CrossesCalifornia Aqueduct
Location1.8 MI S of Main ST
RouteCity Street 0
CountySan Bernardino County
StateCalifornia
Coordinates34.39967, -117.34624
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length156 ft (47.4 m)
Longest span74 ft (22.6 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2016)
Projected traffic4,581 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther State 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 Maple Ave over California Aqueduct built?

It was built in 1971, making it 54 years old in 2025.

What condition is Maple Ave 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 January 2024.

How much traffic does Maple Ave over California Aqueduct carry?

About 3,300 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Maple Ave over California Aqueduct?

The structure is 156 ft (47.4 m) long with a longest span of 74 ft (22.6 m) and a deck 33 ft wide.

Who owns Maple Ave over California Aqueduct?

It is owned by the Other Local Agency and maintained by the Other State Agency.