US Bridges

Interstate 15 SB over Main Street

Good

Riverside County, California · 08-RIV-015-20.95 · Structure no. 56 0382L

Built
1982
43 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
146 ft
1 main span
Daily traffic
61,000
2015 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 SB over Main Street is a prestressed concrete box beam or girders - multiple carrying Interstate 15 SB over Main Street in Riverside County, California. It was built in 1982, so it is 43 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 61,000 vehicles a day, roughly 11% of them trucks, projected to reach 95,590 by 2046. The structure is 146 ft (44.4 m) long and 69 ft wide.

CarriesInterstate 15 SB
CrossesMain Street
Location08-RIV-015-20.95
RouteInterstate 15
Coordinates33.67714, -117.32354
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.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length146 ft (44.4 m)
Longest span146 ft (44.4 m)
Deck width69 ft (21 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61,000 (2015)
Projected traffic95,590 by 2046
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 15 SB over Main Street built?

It was built in 1982, making it 43 years old in 2025.

What condition is Interstate 15 SB over Main Street 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 January 2024.

How much traffic does Interstate 15 SB over Main Street carry?

About 61,000 vehicles per day (2015 count), of which roughly 11% are trucks.

How long is Interstate 15 SB over Main Street?

The structure is 146 ft (44.4 m) long with a longest span of 146 ft (44.4 m) and a deck 69 ft wide.

Who owns Interstate 15 SB over Main Street?

It is owned by the State Highway Agency.