US Bridges

Ralphs Ranch Rd. over Unnamed Wash

Good

Los Angeles County, California · 0.5MI N/O Gorman RD · Structure no. 53C1643

Built
1966
59 years old
Condition
Good
inspected March 2022
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
1,224
2012 count
Owner
County
County Highway Agency

About this bridge

Ralphs Ranch Rd. over Unnamed Wash is a concrete culvert carrying Ralphs Ranch Rd. over Unnamed Wash in Los Angeles County, California. It was built in 1966, so it is 59 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 1,224 vehicles a day, projected to reach 1,373 by 2044. The structure is 22 ft (6.7 m) long and 79 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesRalphs Ranch Rd.
CrossesUnnamed Wash
Location0.5MI N/O Gorman RD
RouteCounty Highway 0WP16
CountyLos Angeles County
StateCalifornia
Coordinates34.79526, -118.85994
Functional classRural Minor Collector

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 inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: 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
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width79 ft (24 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,224 (2012)
Projected traffic1,373 by 2044
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ralphs Ranch Rd. over Unnamed Wash built?

It was built in 1966, making it 59 years old in 2025.

What condition is Ralphs Ranch Rd. over Unnamed 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 March 2022.

How much traffic does Ralphs Ranch Rd. over Unnamed Wash carry?

About 1,224 vehicles per day (2012 count).

How long is Ralphs Ranch Rd. over Unnamed Wash?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m) and a deck 79 ft wide.

Who owns Ralphs Ranch Rd. over Unnamed Wash?

It is owned by the County Highway Agency.