US Bridges

Interstate 15 SB over Temecula River

Good

Riverside County, California · 08-RIV-015-R2.96-TMCA · Structure no. 56 0047L

Built
1973
52 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
316 ft
4 main spans
Daily traffic
64,750
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 SB over Temecula River is a concrete continuous box beam or girders - multiple carrying Interstate 15 SB over Temecula River in Riverside County, California. It was built in 1973, so it is 52 years old, younger 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 64,750 vehicles a day, roughly 7% of them trucks, projected to reach 105,650 by 2041. The structure is 316 ft (96.3 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 15 SB
CrossesTemecula River
Location08-RIV-015-R2.96-TMCA
RouteInterstate 15
Coordinates33.47399, -117.13842
Functional classUrban 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating70 US tons
Inventory rating50.4 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length316 ft (96.3 m)
Longest span90 ft (27.4 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,750 (2021)
Projected traffic105,650 by 2041
Trucks7%
Lanes on structure4
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 SB over Temecula River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Interstate 15 SB over Temecula River 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 2023.

How much traffic does Interstate 15 SB over Temecula River carry?

About 64,750 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Interstate 15 SB over Temecula River?

The structure is 316 ft (96.3 m) long with a longest span of 90 ft (27.4 m) and a deck 68 ft wide.

Who owns Interstate 15 SB over Temecula River?

It is owned by the State Highway Agency.