US Bridges

Bolsa Chica ST over Westminster Channel

Good

Orange County, California · 100 N/O Edinger Ave · Structure no. 55C0075

Built
1960
65 years old, rebuilt 1972
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
87 ft
3 main spans
Daily traffic
36,000
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bolsa Chica ST over Westminster Channel is a concrete continuous slab carrying Bolsa Chica ST over Westminster Channel in Orange County, California. It was built in 1960 and reconstructed in 1972, so it is 65 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 36,000 vehicles a day, roughly 1% of them trucks, projected to reach 32,695 by 2040. The structure is 87 ft (26.5 m) long and 102 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBolsa Chica ST
CrossesWestminster Channel
Location100 N/O Edinger Ave
RouteCity Street 0
Coordinates33.72997, -118.04143
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating66.5 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span28 ft (8.5 m)
Deck width102 ft (31.1 m)
Roadway width85 ft (26 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,000 (2020)
Projected traffic32,695 by 2040
Trucks1%
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 Bolsa Chica ST over Westminster Channel built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1972.

What condition is Bolsa Chica ST over Westminster 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 Westminster Channel carry?

About 36,000 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Bolsa Chica ST over Westminster Channel?

The structure is 87 ft (26.5 m) long with a longest span of 28 ft (8.5 m) and a deck 102 ft wide.

Who owns Bolsa Chica ST over Westminster Channel?

It is owned by the City or Municipal Highway Agency.