US Bridges

Lampson Avenue over Bolsa Chica Channel

Good

Orange County, California · 0.8 MI W/O Valley View · Structure no. 55C0160

Built
1966
59 years old
Condition
Good
inspected April 2024
Type
Tee Beam
Concrete
Length
52 ft
1 main span
Daily traffic
25,000
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lampson Avenue over Bolsa Chica Channel is a concrete tee beam carrying Lampson Avenue over Bolsa Chica 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 25,000 vehicles a day, roughly 1% of them trucks, projected to reach 40,886 by 2041. The structure is 52 ft (15.8 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLampson Avenue
CrossesBolsa Chica Channel
Location0.8 MI W/O Valley View
RouteCity Street 0
Coordinates33.78103, -118.04183
Functional classUrban Minor 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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating40 US tons
Inventory rating31.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span50 ft (15.2 m)
Deck width73 ft (22.2 m)
Roadway width53 ft (16.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2020)
Projected traffic40,886 by 2041
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Lampson Avenue over Bolsa Chica Channel built?

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

What condition is Lampson Avenue over Bolsa Chica 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 April 2024.

How much traffic does Lampson Avenue over Bolsa Chica Channel carry?

About 25,000 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Lampson Avenue over Bolsa Chica Channel?

The structure is 52 ft (15.8 m) long with a longest span of 50 ft (15.2 m) and a deck 73 ft wide.

Who owns Lampson Avenue over Bolsa Chica Channel?

It is owned by the City or Municipal Highway Agency.