US Bridges

Interstate 15 NB over Dale Ditch

Fair

San Bernardino County, California · 08-SBD-015-150.32 · Structure no. 54 0288R

Built
1961
64 years old, rebuilt 1969
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Concrete
Length
40 ft
2 main spans
Daily traffic
18,500
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Dale Ditch is a concrete box beam or girders - single or spread carrying Interstate 15 NB over Dale Ditch in San Bernardino County, California. It was built in 1961 and reconstructed in 1969, so it is 64 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 18,500 vehicles a day, roughly 20% of them trucks, projected to reach 22,200 by 2042. The structure is 40 ft (12.1 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 15 NB
CrossesDale Ditch
Location08-SBD-015-150.32
RouteInterstate 15
CountySan Bernardino County
StateCalifornia
Coordinates35.37791, -115.8792
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete
DeckConcrete, precast panels
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length40 ft (12.1 m)
Longest span19 ft (5.8 m)
Deck width53 ft (16.3 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,500 (2020)
Projected traffic22,200 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 Dale Ditch built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1969.

What condition is Interstate 15 NB over Dale Ditch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Interstate 15 NB over Dale Ditch carry?

About 18,500 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Interstate 15 NB over Dale Ditch?

The structure is 40 ft (12.1 m) long with a longest span of 19 ft (5.8 m) and a deck 53 ft wide.

Who owns Interstate 15 NB over Dale Ditch?

It is owned by the State Highway Agency.