US Bridges

State Route 133 SB over Little Sycamore Creek

Fair

Orange County, California · 12-ORA-133-M5.20 · Structure no. 55 0998L

Built
2004
21 years old
Condition
Fair
inspected November 2022
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
117 ft
2 main spans
Daily traffic
28,500
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 133 SB over Little Sycamore Creek is a concrete continuous box beam or girders - multiple carrying State Route 133 SB over Little Sycamore Creek in Orange County, California. It was built in 2004, so it is 21 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 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 28,500 vehicles a day, roughly 2% of them trucks, projected to reach 40,700 by 2040. The structure is 117 ft (35.8 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 133 SB
CrossesLittle Sycamore Creek
Location12-ORA-133-M5.20
RouteState Highway 133
Coordinates33.6078, -117.76102
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
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

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length117 ft (35.8 m)
Longest span67 ft (20.4 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,500 (2020)
Projected traffic40,700 by 2040
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 State Route 133 SB over Little Sycamore Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is State Route 133 SB over Little Sycamore Creek 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 November 2022.

How much traffic does State Route 133 SB over Little Sycamore Creek carry?

About 28,500 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is State Route 133 SB over Little Sycamore Creek?

The structure is 117 ft (35.8 m) long with a longest span of 67 ft (20.4 m) and a deck 40 ft wide.

Who owns State Route 133 SB over Little Sycamore Creek?

It is owned by the State Highway Agency.