US Bridges

Bolsa Chica ST over Sunset Channel

Good

Orange County, California · 0.4 MI S/O Edinger Ave · Structure no. 55C0156

Built
1966
59 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
29,000
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bolsa Chica ST over Sunset Channel is a concrete culvert carrying Bolsa Chica ST over Sunset Channel in Orange County, California. It was built in 1966, so it is 59 years old, older 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 29,000 vehicles a day, roughly 1% of them trucks, projected to reach 31,640 by 2040. The structure is 25 ft (7.6 m) long and 113 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBolsa Chica ST
CrossesSunset Channel
Location0.4 MI S/O Edinger Ave
RouteCity Street 0
Coordinates33.72479, -118.04133
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
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 spans2
Design loadHS 15
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width113 ft (34.4 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2018)
Projected traffic31,640 by 2040
Trucks1%
Lanes on structure6
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bolsa Chica ST over Sunset Channel built?

It was built in 1966, making it 59 years old in 2025.

What condition is Bolsa Chica ST over Sunset Channel 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 September 2023.

How much traffic does Bolsa Chica ST over Sunset Channel carry?

About 29,000 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Bolsa Chica ST over Sunset Channel?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m) and a deck 113 ft wide.

Who owns Bolsa Chica ST over Sunset Channel?

It is owned by the City or Municipal Highway Agency.