US Bridges

Phillips Ranch RD over Unknown Wash

Good

Los Angeles County, California · 0.3MI N/O SR-60 Fwy · Structure no. 53C1794

Built
1981
44 years old
Condition
Good
inspected December 2021
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
19,900
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Phillips Ranch RD over Unknown Wash is a concrete culvert carrying Phillips Ranch RD over Unknown Wash in Los Angeles County, California. It was built in 1981, so it is 44 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 19,900 vehicles a day, roughly 1% of them trucks, projected to reach 24,169 by 2041. The structure is 33 ft (10.1 m) long and 114 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesPhillips Ranch RD
CrossesUnknown Wash
Location0.3MI N/O SR-60 Fwy
RouteCity Street 0L647
CountyLos Angeles County
StateCalifornia
Coordinates34.02793, -117.77177
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width114 ft (34.7 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,900 (2013)
Projected traffic24,169 by 2041
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Phillips Ranch RD over Unknown Wash built?

It was built in 1981, making it 44 years old in 2025.

What condition is Phillips Ranch RD over Unknown 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 December 2021.

How much traffic does Phillips Ranch RD over Unknown Wash carry?

About 19,900 vehicles per day (2013 count), of which roughly 1% are trucks.

How long is Phillips Ranch RD over Unknown Wash?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 114 ft wide.

Who owns Phillips Ranch RD over Unknown Wash?

It is owned by the City or Municipal Highway Agency.