US Bridges

Interstate 15 NB over Etiwanda Avenue

Fair

San Bernardino County, California · 08-SBD-015-5.97-RCUC · Structure no. 54 0973R

Built
1976
49 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
271 ft
3 main spans
Daily traffic
88,500
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Etiwanda Avenue is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 15 NB over Etiwanda Avenue in San Bernardino County, California. It was built in 1976, so it is 49 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 88,500 vehicles a day, roughly 8% of them trucks, projected to reach 100,000 by 2040. The structure is 271 ft (82.6 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 15 NB
CrossesEtiwanda Avenue
Location08-SBD-015-5.97-RCUC
RouteInterstate 15
CountySan Bernardino County
StateCalifornia
Coordinates34.11283, -117.52388
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length271 ft (82.6 m)
Longest span110 ft (33.5 m)
Deck width70 ft (21.2 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88,500 (2019)
Projected traffic100,000 by 2040
Trucks8%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 15 NB over Etiwanda Avenue built?

It was built in 1976, making it 49 years old in 2025.

What condition is Interstate 15 NB over Etiwanda Avenue 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 March 2023.

How much traffic does Interstate 15 NB over Etiwanda Avenue carry?

About 88,500 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is Interstate 15 NB over Etiwanda Avenue?

The structure is 271 ft (82.6 m) long with a longest span of 110 ft (33.5 m) and a deck 70 ft wide.

Who owns Interstate 15 NB over Etiwanda Avenue?

It is owned by the State Highway Agency.