US Bridges

Interstate 15 NB over Cleghorn Creek

Good

San Bernardino County, California · 08-SBD-015-R18.48 · Structure no. 54 0773R

Built
1969
56 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
284 ft
3 main spans
Daily traffic
92,500
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Cleghorn Creek is a concrete continuous box beam or girders - multiple carrying Interstate 15 NB over Cleghorn Creek 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 92,500 vehicles a day, roughly 14% of them trucks, projected to reach 100,000 by 2045. The structure is 284 ft (86.6 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 15 NB
CrossesCleghorn Creek
Location08-SBD-015-R18.48
RouteInterstate 15
Coordinates34.27808, -117.45111
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating40.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span110 ft (33.5 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92,500 (2022)
Projected traffic100,000 by 2045
Trucks14%
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 Cleghorn Creek built?

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

What condition is Interstate 15 NB over Cleghorn Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Interstate 15 NB over Cleghorn Creek carry?

About 92,500 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Interstate 15 NB over Cleghorn Creek?

The structure is 284 ft (86.6 m) long with a longest span of 110 ft (33.5 m) and a deck 68 ft wide.

Who owns Interstate 15 NB over Cleghorn Creek?

It is owned by the State Highway Agency.