US Bridges

Interstate 15 SB over Wheaton Wash

Poor

San Bernardino County, California · 08-SBD-015-173.84L · Structure no. 54 0621L

Built
1963
62 years old, rebuilt 2017
Condition
Poor
inspected March 2024
Type
Slab
Concrete Continuous
Length
213 ft
9 main spans
Daily traffic
18,500
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 SB over Wheaton Wash is a concrete continuous slab carrying Interstate 15 SB over Wheaton Wash in San Bernardino County, California. It was built in 1963 and reconstructed in 2017, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 18,500 vehicles a day, roughly 20% of them trucks, projected to reach 22,200 by 2042. The structure is 213 ft (64.9 m) long and 59 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesInterstate 15 SB
CrossesWheaton Wash
Location08-SBD-015-173.84L
RouteInterstate 15
Coordinates35.46769, -115.48779
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span25 ft (7.7 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 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 closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 15 SB over Wheaton Wash built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2017.

What condition is Interstate 15 SB over Wheaton Wash in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Interstate 15 SB over Wheaton Wash carry?

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

How long is Interstate 15 SB over Wheaton Wash?

The structure is 213 ft (64.9 m) long with a longest span of 25 ft (7.7 m) and a deck 59 ft wide.

Who owns Interstate 15 SB over Wheaton Wash?

It is owned by the State Highway Agency.