US Bridges

State Route 18 over E138-S18 Connector Ramp

Good

San Bernardino County, California · 08-SBD-018-R17.76 · Structure no. 54 0687

Built
1965
60 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
106 ft
3 main spans
Daily traffic
8,600
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 18 over E138-S18 Connector Ramp is a concrete continuous tee beam carrying State Route 18 over E138-S18 Connector Ramp in San Bernardino County, California. It was built in 1965, so it is 60 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 8,600 vehicles a day, roughly 13% of them trucks, projected to reach 10,000 by 2043. The structure is 106 ft (32.4 m) long and 63 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

CarriesState Route 18
CrossesE138-S18 Connector Ramp
Location08-SBD-018-R17.76
RouteState Highway 18
Coordinates34.22788, -117.28975
Functional classRural 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 inspectionOctober 2024
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating43.5 US tons
Inventory rating31.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length106 ft (32.4 m)
Longest span50 ft (15.2 m)
Deck width63 ft (19.1 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (2017)
Projected traffic10,000 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed47.2 mi (76 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 State Route 18 over E138-S18 Connector Ramp built?

It was built in 1965, making it 60 years old in 2025.

What condition is State Route 18 over E138-S18 Connector Ramp 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 October 2024.

How much traffic does State Route 18 over E138-S18 Connector Ramp carry?

About 8,600 vehicles per day (2017 count), of which roughly 13% are trucks.

How long is State Route 18 over E138-S18 Connector Ramp?

The structure is 106 ft (32.4 m) long with a longest span of 50 ft (15.2 m) and a deck 63 ft wide.

Who owns State Route 18 over E138-S18 Connector Ramp?

It is owned by the State Highway Agency.