US Bridges

S133-N405 Conn over San Diego Creek

Fair

Orange County, California · 12-ORA-133-8.59-IRVN · Structure no. 55 0290F

Built
1968
57 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
151 ft
5 main spans
Daily traffic
13,270
2018 count
Owner
State
State Highway Agency

About this bridge

S133-N405 Conn over San Diego Creek is a concrete continuous slab carrying S133-N405 Conn over San Diego Creek in Orange County, California. It was built in 1968, so it is 57 years old, older 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 13,270 vehicles a day, roughly 3% of them trucks, projected to reach 13,950 by 2043. The structure is 151 ft (46 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS133-N405 Conn
CrossesSan Diego Creek
Location12-ORA-133-8.59-IRVN
RouteState Highway 133
Coordinates33.65463, -117.75995
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length151 ft (46 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,270 (2018)
Projected traffic13,950 by 2043
Trucks3%
Lanes on structure1
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was S133-N405 Conn over San Diego Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is S133-N405 Conn over San Diego 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 2024.

How much traffic does S133-N405 Conn over San Diego Creek carry?

About 13,270 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is S133-N405 Conn over San Diego Creek?

The structure is 151 ft (46 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns S133-N405 Conn over San Diego Creek?

It is owned by the State Highway Agency.