US Bridges

Ralphs Ranch Rd. over Unnamed Wash

Good

Los Angeles County, California · 0.1MI W/O I-5 Fwy · Structure no. 53C1044

Built
1970
55 years old
Condition
Good
inspected March 2024
Type
Arch - Deck
Steel
Length
46 ft
2 main spans
Daily traffic
1,530
2017 count
Owner
County
County Highway Agency

About this bridge

Ralphs Ranch Rd. over Unnamed Wash is a steel arch - deck carrying Ralphs Ranch Rd. over Unnamed Wash in Los Angeles County, California. It was built in 1970, so it is 55 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 1,530 vehicles a day, projected to reach 1,683 by 2043. The structure is 46 ft (14 m) long and 33 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
Location0.1MI W/O I-5 Fwy
RouteCounty Highway 0WP16
CountyLos Angeles County
StateCalifornia
Coordinates34.81536, -118.88469
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
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110 US tons
Inventory rating92.8 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length46 ft (14 m)
Longest span14 ft (4.3 m)
Deck width33 ft (10 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,530 (2017)
Projected traffic1,683 by 2043
Trucks0%
Lanes on structure2
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 1970, making it 55 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 2024.

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

About 1,530 vehicles per day (2017 count).

How long is Ralphs Ranch Rd. over Unnamed Wash?

The structure is 46 ft (14 m) long with a longest span of 14 ft (4.3 m) and a deck 33 ft wide.

Who owns Ralphs Ranch Rd. over Unnamed Wash?

It is owned by the County Highway Agency.