US Bridges

Portola Parkway over Borrego Canyon Wash

Good

Orange County, California · 0.11 Mi. E/O Alton Pkwy. · Structure no. 55C0600

Built
1990
35 years old
Condition
Good
inspected September 2022
Type
Culvert
Steel
Length
24 ft
1 main span
Daily traffic
8,330
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Portola Parkway over Borrego Canyon Wash is a steel culvert carrying Portola Parkway over Borrego Canyon Wash in Orange County, California. It was built in 1990, so it is 35 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 8,330 vehicles a day, roughly 1% of them trucks, projected to reach 12,868 by 2041. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPortola Parkway
CrossesBorrego Canyon Wash
Location0.11 Mi. E/O Alton Pkwy.
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.68189, -117.66588
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,330 (2017)
Projected traffic12,868 by 2041
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRelief for waterway
Detour if closed3.1 mi (5 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 Portola Parkway over Borrego Canyon Wash built?

It was built in 1990, making it 35 years old in 2025.

What condition is Portola Parkway over Borrego Canyon Wash 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 September 2022.

How much traffic does Portola Parkway over Borrego Canyon Wash carry?

About 8,330 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Portola Parkway over Borrego Canyon Wash?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m).

Who owns Portola Parkway over Borrego Canyon Wash?

It is owned by the City or Municipal Highway Agency.