US Bridges

Interstate 15 SB over BNSF RY AMTRAK & UP RR

Fair

San Bernardino County, California · 08-SBD-015-15.90 · Structure no. 54 0818L

Built
1969
56 years old, rebuilt 2016
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
3 main spans
Daily traffic
69,500
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 SB over BNSF RY AMTRAK & UP RR is a prestressed concrete stringer/multi-beam or girder carrying Interstate 15 SB over BNSF RY AMTRAK & UP RR in San Bernardino County, California. It was built in 1969 and reconstructed in 2016, so it is 56 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 69,500 vehicles a day, roughly 11% of them trucks, projected to reach 93,000 by 2042. The structure is 252 ft (76.8 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 15 SB
CrossesBNSF RY AMTRAK & UP RR
Location08-SBD-015-15.90
RouteInterstate 15
CountySan Bernardino County
StateCalifornia
Coordinates34.21845, -117.41093
Functional classRural 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
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating1.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length252 ft (76.8 m)
Longest span113 ft (34.4 m)
Deck width85 ft (25.8 m)
Roadway width81 ft (24.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,500 (2022)
Projected traffic93,000 by 2042
Trucks11%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 SB over BNSF RY AMTRAK & UP RR built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2016.

What condition is Interstate 15 SB over BNSF RY AMTRAK & UP RR 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 2025.

How much traffic does Interstate 15 SB over BNSF RY AMTRAK & UP RR carry?

About 69,500 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Interstate 15 SB over BNSF RY AMTRAK & UP RR?

The structure is 252 ft (76.8 m) long with a longest span of 113 ft (34.4 m) and a deck 85 ft wide.

Who owns Interstate 15 SB over BNSF RY AMTRAK & UP RR?

It is owned by the State Highway Agency.