US Bridges

Gypsum Canyon Road over Santa Ana River

Fair

Orange County, California · 0.2 Mi. N/O Route 91 Fwy. · Structure no. 55C0580

Built
1989
36 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,730 ft
7 main spans
Daily traffic
11,449
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gypsum Canyon Road over Santa Ana River is a prestressed concrete continuous box beam or girders - multiple carrying Gypsum Canyon Road over Santa Ana River in Orange County, California. It was built in 1989, so it is 36 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,449 vehicles a day, roughly 1% of them trucks, projected to reach 21,370 by 2041. The structure is 1,730 ft (527.3 m) long and 78 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGypsum Canyon Road
CrossesSanta Ana River
Location0.2 Mi. N/O Route 91 Fwy.
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.86881, -117.71238
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length1,730 ft (527.3 m)
Longest span330 ft (100.6 m)
Deck width78 ft (23.8 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,449 (2023)
Projected traffic21,370 by 2041
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Gypsum Canyon Road over Santa Ana River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Gypsum Canyon Road over Santa Ana River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Gypsum Canyon Road over Santa Ana River carry?

About 11,449 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Gypsum Canyon Road over Santa Ana River?

The structure is 1,730 ft (527.3 m) long with a longest span of 330 ft (100.6 m) and a deck 78 ft wide.

Who owns Gypsum Canyon Road over Santa Ana River?

It is owned by the City or Municipal Highway Agency.