US Bridges

Interstate 15 over Glen Helen Road

Good

San Bernardino County, California · 08-SBD-015-15.66 · Structure no. 54 0780

Built
1969
56 years old, rebuilt 2016
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
171 ft
3 main spans
Daily traffic
139,000
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 over Glen Helen Road is a concrete continuous box beam or girders - multiple carrying Interstate 15 over Glen Helen Road 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 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 139,000 vehicles a day, roughly 11% of them trucks, projected to reach 186,000 by 2042. The structure is 171 ft (52.2 m) long and 165 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 15
CrossesGlen Helen Road
Location08-SBD-015-15.66
RouteInterstate 15
Coordinates34.21497, -117.41174
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.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.9 US tons
Inventory rating48.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52.2 m)
Longest span94 ft (28.8 m)
Deck width165 ft (50.2 m)
Roadway width160 ft (48.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic139,000 (2022)
Projected traffic186,000 by 2042
Trucks11%
Lanes on structure10
Traffic directionTwo-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 over Glen Helen Road built?

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

What condition is Interstate 15 over Glen Helen Road 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 January 2025.

How much traffic does Interstate 15 over Glen Helen Road carry?

About 139,000 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Interstate 15 over Glen Helen Road?

The structure is 171 ft (52.2 m) long with a longest span of 94 ft (28.8 m) and a deck 165 ft wide.

Who owns Interstate 15 over Glen Helen Road?

It is owned by the State Highway Agency.