US Bridges

Route 40 E Bound over Rock Ditch

Good

San Bernardino County, California · 08-SBD-040-R7.40 · Structure no. 54 0785R

Built
1964
61 years old, rebuilt 2018
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
9,800
2024 count
Owner
State
State Highway Agency

About this bridge

Route 40 E Bound over Rock Ditch is a concrete continuous culvert carrying Route 40 E Bound over Rock Ditch in San Bernardino County, California. It was built in 1964 and reconstructed in 2018, so it is 61 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 9,800 vehicles a day, roughly 40% of them trucks, projected to reach 14,566 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 40 E Bound
CrossesRock Ditch
Location08-SBD-040-R7.40
RouteInterstate 40
Coordinates34.85397, -116.88607
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,800 (2024)
Projected traffic14,566 by 2046
Trucks40%
Lanes on structure3
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 Route 40 E Bound over Rock Ditch built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2018.

What condition is Route 40 E Bound over Rock Ditch 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 Route 40 E Bound over Rock Ditch carry?

About 9,800 vehicles per day (2024 count), of which roughly 40% are trucks.

How long is Route 40 E Bound over Rock Ditch?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Route 40 E Bound over Rock Ditch?

It is owned by the State Highway Agency.