US Bridges

State Route 58 WB over Agate Road

Good

San Bernardino County, California · 08-SBD-058-R32.96-BSW · Structure no. 54 1111L

Built
1997
28 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
125 ft
1 main span
Daily traffic
6,750
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 58 WB over Agate Road is a prestressed concrete box beam or girders - multiple carrying State Route 58 WB over Agate Road in San Bernardino County, California. It was built in 1997, so it is 28 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 6,750 vehicles a day, roughly 50% of them trucks, projected to reach 10,000 by 2040. The structure is 125 ft (38 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 58 WB
CrossesAgate Road
Location08-SBD-058-R32.96-BSW
RouteState Highway 58
Coordinates34.89271, -117.09366
Functional classRural Principal Arterial - Other

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 inspectionApril 2023
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 rating65.7 US tons
Inventory rating32.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length125 ft (38 m)
Longest span121 ft (37 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,750 (2020)
Projected traffic10,000 by 2040
Trucks50%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 State Route 58 WB over Agate Road built?

It was built in 1997, making it 28 years old in 2025.

What condition is State Route 58 WB over Agate 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 April 2023.

How much traffic does State Route 58 WB over Agate Road carry?

About 6,750 vehicles per day (2020 count), of which roughly 50% are trucks.

How long is State Route 58 WB over Agate Road?

The structure is 125 ft (38 m) long with a longest span of 121 ft (37 m) and a deck 42 ft wide.

Who owns State Route 58 WB over Agate Road?

It is owned by the State Highway Agency.