US Bridges

Interstate 15 NB over Day Canyon Channel

Fair

San Bernardino County, California · 08-SBD-015-4.47-RCUC · Structure no. 54 0920R

Built
1975
50 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
314 ft
3 main spans
Daily traffic
98,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Day Canyon Channel is a concrete continuous box beam or girders - multiple carrying Interstate 15 NB over Day Canyon Channel in San Bernardino County, California. It was built in 1975, so it is 50 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 98,000 vehicles a day, roughly 10% of them trucks, projected to reach 136,200 by 2042. The structure is 314 ft (95.7 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 15 NB
CrossesDay Canyon Channel
Location08-SBD-015-4.47-RCUC
RouteInterstate 15
CountySan Bernardino County
StateCalifornia
Coordinates34.09674, -117.54154
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMarch 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating59 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length314 ft (95.7 m)
Longest span111 ft (33.8 m)
Deck width68 ft (20.7 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98,000 (2020)
Projected traffic136,200 by 2042
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 15 NB over Day Canyon Channel built?

It was built in 1975, making it 50 years old in 2025.

What condition is Interstate 15 NB over Day Canyon Channel 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 Day Canyon Channel carry?

About 98,000 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Interstate 15 NB over Day Canyon Channel?

The structure is 314 ft (95.7 m) long with a longest span of 111 ft (33.8 m) and a deck 68 ft wide.

Who owns Interstate 15 NB over Day Canyon Channel?

It is owned by the State Highway Agency.