US Bridges

Interstate 15 NB over Mesquite Ditch

Fair

San Bernardino County, California · 08-SBD-015-169.58R · Structure no. 54 0722R

Built
1963
62 years old, rebuilt 1969
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
18,500
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Mesquite Ditch is a concrete culvert carrying Interstate 15 NB over Mesquite Ditch in San Bernardino County, California. It was built in 1963 and reconstructed in 1969, 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 fair condition with a lowest component rating of 6 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 38 ft (11.6 m) long and 83 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesInterstate 15 NB
CrossesMesquite Ditch
Location08-SBD-015-169.58R
RouteInterstate 15
CountySan Bernardino County
StateCalifornia
Coordinates35.47199, -115.56189
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width83 ft (25.3 m)
Roadway width51 ft (15.6 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 closed8.1 mi (13 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 Mesquite Ditch built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1969.

What condition is Interstate 15 NB over Mesquite 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 March 2024.

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

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

How long is Interstate 15 NB over Mesquite Ditch?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 83 ft wide.

Who owns Interstate 15 NB over Mesquite Ditch?

It is owned by the State Highway Agency.