US Bridges

State Route 74 over Hot Springs Canyon

Fair

Orange County, California · 12-ORA-074-12.34-SJCP · Structure no. 55 0063

Built
1991
34 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
105 ft
1 main span
Daily traffic
9,800
2014 count
Owner
State
State Highway Agency

About this bridge

State Route 74 over Hot Springs Canyon is a prestressed concrete box beam or girders - multiple carrying State Route 74 over Hot Springs Canyon in Orange County, California. It was built in 1991, so it is 34 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 9,800 vehicles a day, roughly 5% of them trucks, projected to reach 23,300 by 2040. The structure is 105 ft (32 m) long and 44 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 74
CrossesHot Springs Canyon
Location12-ORA-074-12.34-SJCP
RouteState Highway 74
CountyOrange County
StateCalifornia
Coordinates33.58902, -117.51572
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length105 ft (32 m)
Longest span100 ft (30.5 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,800 (2014)
Projected traffic23,300 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 74 over Hot Springs Canyon built?

It was built in 1991, making it 34 years old in 2025.

What condition is State Route 74 over Hot Springs Canyon 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 August 2023.

How much traffic does State Route 74 over Hot Springs Canyon carry?

About 9,800 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is State Route 74 over Hot Springs Canyon?

The structure is 105 ft (32 m) long with a longest span of 100 ft (30.5 m) and a deck 44 ft wide.

Who owns State Route 74 over Hot Springs Canyon?

It is owned by the State Highway Agency.