US Bridges

Interstate 15 NB over Dry Lake Ditch

Good

San Bernardino County, California · 08-SBD-015-180.94 · Structure no. 54 0317R

Built
1963
62 years old, rebuilt 2010
Condition
Good
inspected March 2024
Type
Slab
Concrete Continuous
Length
92 ft
5 main spans
Daily traffic
19,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Dry Lake Ditch is a concrete continuous slab carrying Interstate 15 NB over Dry Lake Ditch in San Bernardino County, California. It was built in 1963 and reconstructed in 2010, so it is 62 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 19,000 vehicles a day, roughly 20% of them trucks, projected to reach 22,800 by 2042. The structure is 92 ft (28 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 15 NB
CrossesDry Lake Ditch
Location08-SBD-015-180.94
RouteInterstate 15
Coordinates35.53454, -115.42212
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating34.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length92 ft (28 m)
Longest span20 ft (6.1 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,000 (2020)
Projected traffic22,800 by 2042
Trucks20%
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 Interstate 15 NB over Dry Lake Ditch built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2010.

What condition is Interstate 15 NB over Dry Lake 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 March 2024.

How much traffic does Interstate 15 NB over Dry Lake Ditch carry?

About 19,000 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Interstate 15 NB over Dry Lake Ditch?

The structure is 92 ft (28 m) long with a longest span of 20 ft (6.1 m) and a deck 59 ft wide.

Who owns Interstate 15 NB over Dry Lake Ditch?

It is owned by the State Highway Agency.