US Bridges

SR 164 (rosemead) over Rio Hondo

Fair

Los Angeles County, California · 07-LA-164-4.91-EMTE · Structure no. 53 0235

Built
1937
88 years old, rebuilt 1951
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete Continuous
Length
414 ft
9 main spans
Daily traffic
44,100
2021 count
Owner
State
State Highway Agency

About this bridge

SR 164 (rosemead) over Rio Hondo is a concrete continuous tee beam carrying SR 164 (rosemead) over Rio Hondo in Los Angeles County, California. It was built in 1937 and reconstructed in 1951, so it is 88 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 44,100 vehicles a day, roughly 4% of them trucks, projected to reach 57,524 by 2043. The structure is 414 ft (126.2 m) long and 92 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 164 (rosemead)
CrossesRio Hondo
Location07-LA-164-4.91-EMTE
RouteState Highway 164
CountyLos Angeles County
StateCalifornia
Coordinates34.06383, -118.06606
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
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.2 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadH 15
Structure length414 ft (126.2 m)
Longest span48 ft (14.6 m)
Deck width92 ft (28 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,100 (2021)
Projected traffic57,524 by 2043
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 164 (rosemead) over Rio Hondo built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1951.

What condition is SR 164 (rosemead) over Rio Hondo 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 December 2024.

How much traffic does SR 164 (rosemead) over Rio Hondo carry?

About 44,100 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is SR 164 (rosemead) over Rio Hondo?

The structure is 414 ft (126.2 m) long with a longest span of 48 ft (14.6 m) and a deck 92 ft wide.

Who owns SR 164 (rosemead) over Rio Hondo?

It is owned by the State Highway Agency.