US Bridges

Lobo Cyn RD W/Xing over Lobo Crk

Good

Los Angeles County, California · 1.4MI W/O Trifuno Cyn RD · Structure no. 53C1017

Built
1954
71 years old
Condition
Good
inspected October 2024
Type
Frame
Wood or Timber
Length
26 ft
1 main span
Daily traffic
189
2017 count
Owner
County
County Highway Agency

About this bridge

Lobo Cyn RD W/Xing over Lobo Crk is a wood or timber frame carrying Lobo Cyn RD W/Xing over Lobo Crk in Los Angeles County, California. It was built in 1954, so it is 71 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 189 vehicles a day, roughly 1% of them trucks, projected to reach 189 by 2042. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLobo Cyn RD W/Xing
CrossesLobo Crk
Location1.4MI W/O Trifuno Cyn RD
RouteCounty Highway 0
Coordinates34.11853, -118.81529
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeFrame
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width28 ft (8.4 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2017)
Projected traffic189 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Lobo Cyn RD W/Xing over Lobo Crk built?

It was built in 1954, making it 71 years old in 2025.

What condition is Lobo Cyn RD W/Xing over Lobo 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 2024.

How much traffic does Lobo Cyn RD W/Xing over Lobo Crk carry?

About 189 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Lobo Cyn RD W/Xing over Lobo Crk?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Lobo Cyn RD W/Xing over Lobo Crk?

It is owned by the County Highway Agency.