US Bridges

Jamboree Road (nb) over State Route 261

Fair

Orange County, California · 12-ORA-261-0.25-IRVN · Structure no. 55 0899

Built
1997
28 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
732 ft
5 main spans
Daily traffic
10,000
2020 count
Owner
State
State Highway Agency

About this bridge

Jamboree Road (nb) over State Route 261 is a prestressed concrete continuous box beam or girders - multiple carrying Jamboree Road (nb) over State Route 261 in Orange County, California. It was built in 1997, so it is 28 years old, younger 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,035 by 2043. The structure is 732 ft (223 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesJamboree Road (nb)
CrossesState Route 261
Location12-ORA-261-0.25-IRVN
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.71596, -117.79836
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length732 ft (223 m)
Longest span165 ft (50.3 m)
Deck width52 ft (15.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2020)
Projected traffic12,035 by 2043
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Jamboree Road (nb) over State Route 261 built?

It was built in 1997, making it 28 years old in 2025.

What condition is Jamboree Road (nb) over State Route 261 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 2023.

How much traffic does Jamboree Road (nb) over State Route 261 carry?

About 10,000 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Jamboree Road (nb) over State Route 261?

The structure is 732 ft (223 m) long with a longest span of 165 ft (50.3 m) and a deck 52 ft wide.

Who owns Jamboree Road (nb) over State Route 261?

It is owned by the State Highway Agency.