US Bridges

Valyermo RD over Big Rock Crk

Fair

Los Angeles County, California · 100FT W/O Bobs Gap RD · Structure no. 53C0589

Built
1927
98 years old, rebuilt 1960
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
161 ft
3 main spans
Daily traffic
1,530
2017 count
Owner
County
County Highway Agency

About this bridge

Valyermo RD over Big Rock Crk is a concrete tee beam carrying Valyermo RD over Big Rock Crk in Los Angeles County, California. It was built in 1927 and reconstructed in 1960, so it is 98 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,530 vehicles a day, roughly 1% of them trucks, projected to reach 1,683 by 2041. The structure is 161 ft (49.1 m) long and 35 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesValyermo RD
CrossesBig Rock Crk
Location100FT W/O Bobs Gap RD
RouteCounty Highway 0W494
CountyLos Angeles County
StateCalifornia
Coordinates34.43599, -117.83713
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length161 ft (49.1 m)
Longest span53 ft (16.2 m)
Deck width35 ft (10.6 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,530 (2017)
Projected traffic1,683 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Valyermo RD over Big Rock Crk built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1960.

What condition is Valyermo RD over Big Rock Crk in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does Valyermo RD over Big Rock Crk carry?

About 1,530 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Valyermo RD over Big Rock Crk?

The structure is 161 ft (49.1 m) long with a longest span of 53 ft (16.2 m) and a deck 35 ft wide.

Who owns Valyermo RD over Big Rock Crk?

It is owned by the County Highway Agency.