US Bridges

Chestnut ST over Westminster Channel

Good

Orange County, California · 0.3 MI North Bolsa Ave · Structure no. 55C0547

Built
1974
51 years old
Condition
Good
inspected April 2021
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
1,500
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Chestnut ST over Westminster Channel is a concrete culvert carrying Chestnut ST over Westminster Channel in Orange County, California. It was built in 1974, so it is 51 years old, younger 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 1,500 vehicles a day, roughly 1% of them trucks, projected to reach 2,137 by 2039. The structure is 39 ft (11.9 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesChestnut ST
CrossesWestminster Channel
Location0.3 MI North Bolsa Ave
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.74822, -118.00253
Functional classUrban Collector

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 inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width75 ft (23 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2021)
Projected traffic2,137 by 2039
Trucks1%
Lanes on structure2
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 Chestnut ST over Westminster Channel built?

It was built in 1974, making it 51 years old in 2025.

What condition is Chestnut 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 April 2021.

How much traffic does Chestnut ST over Westminster Channel carry?

About 1,500 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Chestnut ST over Westminster Channel?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m) and a deck 75 ft wide.

Who owns Chestnut ST over Westminster Channel?

It is owned by the City or Municipal Highway Agency.