US Bridges

Sierra HWY Oc over Route 14

Fair

Los Angeles County, California · 07-LA-014-R52.17 · Structure no. 53 0979

Built
1965
60 years old
Condition
Fair
inspected February 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
288 ft
4 main spans
Daily traffic
4,900
2017 count
Owner
State
State Highway Agency

About this bridge

Sierra HWY Oc over Route 14 is a concrete continuous box beam or girders - multiple carrying Sierra HWY Oc over Route 14 in Los Angeles County, California. It was built in 1965, so it is 60 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 5 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 4,900 vehicles a day, roughly 2% of them trucks, projected to reach 7,211 by 2041. The structure is 288 ft (87.9 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSierra HWY Oc
CrossesRoute 14
Location07-LA-014-R52.17
RouteCounty Highway 0
Coordinates34.4876, -118.14035
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating32.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length288 ft (87.9 m)
Longest span92 ft (28 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2017)
Projected traffic7,211 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sierra HWY Oc over Route 14 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Sierra HWY Oc over Route 14 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 February 2023.

How much traffic does Sierra HWY Oc over Route 14 carry?

About 4,900 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Sierra HWY Oc over Route 14?

The structure is 288 ft (87.9 m) long with a longest span of 92 ft (28 m) and a deck 35 ft wide.

Who owns Sierra HWY Oc over Route 14?

It is owned by the State Highway Agency.