US Bridges

Milliken Avenue over Interstate 10

Fair

San Bernardino County, California · 08-SBD-010-9.17-ONT · Structure no. 54 0539

Built
1971
54 years old, rebuilt 2000
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
330 ft
3 main spans
Daily traffic
30,500
2023 count
Owner
State
State Highway Agency

About this bridge

Milliken Avenue over Interstate 10 is a prestressed concrete continuous box beam or girders - single or spread carrying Milliken Avenue over Interstate 10 in San Bernardino County, California. It was built in 1971 and reconstructed in 2000, 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 30,500 vehicles a day, roughly 11% of them trucks, projected to reach 52,000 by 2045. The structure is 330 ft (100.6 m) long and 140 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMilliken Avenue
CrossesInterstate 10
Location08-SBD-010-9.17-ONT
RouteCity Street 0
CountySan Bernardino County
StateCalifornia
Coordinates34.06714, -117.55836
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating42.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length330 ft (100.6 m)
Longest span135 ft (41.1 m)
Deck width140 ft (42.6 m)
Roadway width132 ft (40.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,500 (2023)
Projected traffic52,000 by 2045
Trucks11%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Milliken Avenue over Interstate 10 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2000.

What condition is Milliken Avenue over Interstate 10 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 May 2023.

How much traffic does Milliken Avenue over Interstate 10 carry?

About 30,500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Milliken Avenue over Interstate 10?

The structure is 330 ft (100.6 m) long with a longest span of 135 ft (41.1 m) and a deck 140 ft wide.

Who owns Milliken Avenue over Interstate 10?

It is owned by the State Highway Agency.