US Bridges

Idaho Street over Imperial Channel

Good

Orange County, California · 0.1 Mi. N/O Imperial Hwy. · Structure no. 55C0325

Built
1963
62 years old, rebuilt 1999
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
17,000
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Idaho Street over Imperial Channel is a concrete culvert carrying Idaho Street over Imperial Channel in Orange County, California. It was built in 1963 and reconstructed in 1999, so it is 62 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 17,000 vehicles a day, roughly 1% of them trucks, projected to reach 37,320 by 2043. The structure is 28 ft (8.5 m) long and 139 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIdaho Street
CrossesImperial Channel
Location0.1 Mi. N/O Imperial Hwy.
RouteCity Street 0
Coordinates33.91896, -117.9591
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
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 loadUnknown
Structure length28 ft (8.5 m)
Longest span13 ft (4 m)
Deck width139 ft (42.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2017)
Projected traffic37,320 by 2043
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 Idaho Street over Imperial Channel built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1999.

What condition is Idaho Street over Imperial 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 2023.

How much traffic does Idaho Street over Imperial Channel carry?

About 17,000 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Idaho Street over Imperial Channel?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (4 m) and a deck 139 ft wide.

Who owns Idaho Street over Imperial Channel?

It is owned by the City or Municipal Highway Agency.