US Bridges

Main Street over Interstate 15

Good

San Bernardino County, California · 08-SBD-015-34.00-HES · Structure no. 54 1273

Built
2005
20 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
312 ft
2 main spans
Daily traffic
20,000
2015 count
Owner
State
State Highway Agency

About this bridge

Main Street over Interstate 15 is a prestressed concrete continuous box beam or girders - multiple carrying Main Street over Interstate 15 in San Bernardino County, California. It was built in 2005, so it is 20 years old, younger 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 20,000 vehicles a day, roughly 10% of them trucks, projected to reach 24,000 by 2042. The structure is 312 ft (95.2 m) long and 102 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMain Street
CrossesInterstate 15
Location08-SBD-015-34.00-HES
RouteCounty Highway 0
Coordinates34.42663, -117.38088
Functional classUrban Minor Arterial

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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating43.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length312 ft (95.2 m)
Longest span158 ft (48.1 m)
Deck width102 ft (31.2 m)
Roadway width91 ft (27.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2015)
Projected traffic24,000 by 2042
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 Main Street over Interstate 15 built?

It was built in 2005, making it 20 years old in 2025.

What condition is Main Street over Interstate 15 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 March 2024.

How much traffic does Main Street over Interstate 15 carry?

About 20,000 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Main Street over Interstate 15?

The structure is 312 ft (95.2 m) long with a longest span of 158 ft (48.1 m) and a deck 102 ft wide.

Who owns Main Street over Interstate 15?

It is owned by the State Highway Agency.