US Bridges

Sierra HWY over Metrolink & UP RR Creek

Fair

Los Angeles County, California · 0.1 MI East of I-5 · Structure no. 53C0183

Built
1911
114 years old, rebuilt 1934
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
159 ft
5 main spans
Daily traffic
6,100
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sierra HWY over Metrolink & UP RR Creek is a concrete continuous tee beam carrying Sierra HWY over Metrolink & UP RR Creek in Los Angeles County, California. It was built in 1911 and reconstructed in 1934, so it is 114 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 6,100 vehicles a day, roughly 2% of them trucks, projected to reach 8,410 by 2046. The structure is 159 ft (48.5 m) long and 48 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSierra HWY
CrossesMetrolink & UP RR Creek
Location0.1 MI East of I-5
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.3328, -118.50601
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating37.5 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length159 ft (48.5 m)
Longest span38 ft (11.6 m)
Deck width48 ft (14.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2018)
Projected traffic8,410 by 2046
Trucks2%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad and waterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Sierra HWY over Metrolink & UP RR Creek built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 1934.

What condition is Sierra HWY over Metrolink & UP RR Creek 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 August 2024.

How much traffic does Sierra HWY over Metrolink & UP RR Creek carry?

About 6,100 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Sierra HWY over Metrolink & UP RR Creek?

The structure is 159 ft (48.5 m) long with a longest span of 38 ft (11.6 m) and a deck 48 ft wide.

Who owns Sierra HWY over Metrolink & UP RR Creek?

It is owned by the City or Municipal Highway Agency.