US Bridges

E Frk RD over Horse Cyn Crk

Good

Los Angeles County, California · 3.0MI E/O San Gab Cyn RD · Structure no. 53C1410

Built
1942
83 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
2,000
2017 count
Owner
County
County Highway Agency

About this bridge

E Frk RD over Horse Cyn Crk is a concrete slab carrying E Frk RD over Horse Cyn Crk in Los Angeles County, California. It was built in 1942, so it is 83 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,200 by 2042. The structure is 22 ft (6.7 m) long and 30 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesE Frk RD
CrossesHorse Cyn Crk
Location3.0MI E/O San Gab Cyn RD
RouteCounty Highway 0W480
Coordinates34.23159, -117.79235
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2017)
Projected traffic2,200 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 E Frk RD over Horse Cyn Crk built?

It was built in 1942, making it 83 years old in 2025.

What condition is E Frk RD over Horse Cyn Crk 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 October 2023.

How much traffic does E Frk RD over Horse Cyn Crk carry?

About 2,000 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is E Frk RD over Horse Cyn Crk?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns E Frk RD over Horse Cyn Crk?

It is owned by the County Highway Agency.