US Bridges

State College Blvd over Carbon Creek Channel

Fair

Orange County, California · 0.15 MI S/O Orangethorpe · Structure no. 55C0346

Built
1969
56 years old, rebuilt 1977
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
25 ft
3 main spans
Daily traffic
35,300
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

State College Blvd over Carbon Creek Channel is a concrete culvert carrying State College Blvd over Carbon Creek Channel in Orange County, California. It was built in 1969 and reconstructed in 1977, so it is 56 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 35,300 vehicles a day, roughly 2% of them trucks, projected to reach 66,488 by 2042. The structure is 25 ft (7.6 m) long and 148 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState College Blvd
CrossesCarbon Creek Channel
Location0.15 MI S/O Orangethorpe
RouteCity Street 0
Coordinates33.85798, -117.88905
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width148 ft (45.1 m)
Roadway width85 ft (25.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,300 (2018)
Projected traffic66,488 by 2042
Trucks2%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 College Blvd over Carbon Creek Channel built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1977.

What condition is State College Blvd over Carbon Creek Channel 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 February 2024.

How much traffic does State College Blvd over Carbon Creek Channel carry?

About 35,300 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is State College Blvd over Carbon Creek Channel?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m) and a deck 148 ft wide.

Who owns State College Blvd over Carbon Creek Channel?

It is owned by the City or Municipal Highway Agency.