US Bridges

W91 on Ramp over Houston Ave Drain

Good

Orange County, California · 12-ORA-091-2.15-ANA · Structure no. 55 0320K

Built
1958
67 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
76 ft
3 main spans
Daily traffic
8,650
2012 count
Owner
State
State Highway Agency

About this bridge

W91 on Ramp over Houston Ave Drain is a concrete culvert carrying W91 on Ramp over Houston Ave Drain in Orange County, California. It was built in 1958, so it is 67 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 8,650 vehicles a day, roughly 8% of them trucks, projected to reach 9,707 by 2046. The structure is 76 ft (23.2 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesW91 on Ramp
CrossesHouston Ave Drain
Location12-ORA-091-2.15-ANA
RouteState Highway 91
Coordinates33.85439, -117.94454
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span25 ft (7.6 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,650 (2012)
Projected traffic9,707 by 2046
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 W91 on Ramp over Houston Ave Drain built?

It was built in 1958, making it 67 years old in 2025.

What condition is W91 on Ramp over Houston Ave Drain 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 November 2024.

How much traffic does W91 on Ramp over Houston Ave Drain carry?

About 8,650 vehicles per day (2012 count), of which roughly 8% are trucks.

How long is W91 on Ramp over Houston Ave Drain?

The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 35 ft wide.

Who owns W91 on Ramp over Houston Ave Drain?

It is owned by the State Highway Agency.