US Bridges

Interstate 15 NB over Cleghorn Canyon RD

Fair

San Bernardino County, California · 08-SBD-015-R20.02 · Structure no. 54 0776R

Built
1969
56 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
146 ft
3 main spans
Daily traffic
93,500
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Cleghorn Canyon RD is a concrete continuous box beam or girders - multiple carrying Interstate 15 NB over Cleghorn Canyon RD in San Bernardino County, California. It was built in 1969, 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 93,500 vehicles a day, roughly 14% of them trucks, projected to reach 100,000 by 2045. The structure is 146 ft (44.4 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 15 NB
CrossesCleghorn Canyon RD
Location08-SBD-015-R20.02
RouteInterstate 15
CountySan Bernardino County
StateCalifornia
Coordinates34.29895, -117.45728
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
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 rating55.3 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length146 ft (44.4 m)
Longest span78 ft (23.8 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93,500 (2022)
Projected traffic100,000 by 2045
Trucks14%
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 Cleghorn Canyon RD built?

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

What condition is Interstate 15 NB over Cleghorn Canyon RD 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 2024.

How much traffic does Interstate 15 NB over Cleghorn Canyon RD carry?

About 93,500 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Interstate 15 NB over Cleghorn Canyon RD?

The structure is 146 ft (44.4 m) long with a longest span of 78 ft (23.8 m) and a deck 68 ft wide.

Who owns Interstate 15 NB over Cleghorn Canyon RD?

It is owned by the State Highway Agency.