US Bridges

Crowther Avenue over Placentia Storm Channel

Good

Orange County, California · 100 W/O Route 57 Fwy. · Structure no. 55C0356

Built
1969
56 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
4,500
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Crowther Avenue over Placentia Storm Channel is a concrete culvert carrying Crowther Avenue over Placentia Storm Channel in Orange County, California. It was built in 1969, 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 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 4,500 vehicles a day, roughly 1% of them trucks, projected to reach 16,931 by 2042. The structure is 21 ft (6.4 m) long and 81 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCrowther Avenue
CrossesPlacentia Storm Channel
Location100 W/O Route 57 Fwy.
RouteCity Street 0
Coordinates33.86597, -117.87931
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 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 spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width81 ft (24.8 m)
Roadway width64 ft (19.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2015)
Projected traffic16,931 by 2042
Trucks1%
Lanes on structure5
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 Crowther Avenue over Placentia Storm Channel built?

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

What condition is Crowther Avenue over Placentia Storm 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 October 2024.

How much traffic does Crowther Avenue over Placentia Storm Channel carry?

About 4,500 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Crowther Avenue over Placentia Storm Channel?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 81 ft wide.

Who owns Crowther Avenue over Placentia Storm Channel?

It is owned by the City or Municipal Highway Agency.