US Bridges

Dyer Road over Santa Ana Delhi Channel

Good

Orange County, California · 100 E/O Flower ST · Structure no. 55C0363

Built
1971
54 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
23,000
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dyer Road over Santa Ana Delhi Channel is a concrete culvert carrying Dyer Road over Santa Ana Delhi Channel in Orange County, California. It was built in 1971, so it is 54 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 23,000 vehicles a day, roughly 1% of them trucks, projected to reach 56,889 by 2047. The structure is 34 ft (10.4 m) long and 81 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDyer Road
CrossesSanta Ana Delhi Channel
Location100 E/O Flower ST
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.70955, -117.87669
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal 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 length34 ft (10.4 m)
Longest span16 ft (4.9 m)
Deck width81 ft (24.6 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2021)
Projected traffic56,889 by 2047
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 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dyer Road over Santa Ana Delhi Channel built?

It was built in 1971, making it 54 years old in 2025.

What condition is Dyer Road over Santa Ana Delhi 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 February 2025.

How much traffic does Dyer Road over Santa Ana Delhi Channel carry?

About 23,000 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Dyer Road over Santa Ana Delhi Channel?

The structure is 34 ft (10.4 m) long with a longest span of 16 ft (4.9 m) and a deck 81 ft wide.

Who owns Dyer Road over Santa Ana Delhi Channel?

It is owned by the City or Municipal Highway Agency.