US Bridges

Longden Ave over Eaton Wash

Good

Los Angeles County, California · 0.5MI E/O Sn Gabriel Blvd · Structure no. 53C0653

Built
1957
68 years old
Condition
Good
inspected July 2021
Type
Frame
Concrete
Length
39 ft
1 main span
Daily traffic
4,386
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

Longden Ave over Eaton Wash is a concrete frame carrying Longden Ave over Eaton Wash in Los Angeles County, California. It was built in 1957, so it is 68 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 4,386 vehicles a day, roughly 1% of them trucks, projected to reach 4,825 by 2041. The structure is 39 ft (11.9 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLongden Ave
CrossesEaton Wash
Location0.5MI E/O Sn Gabriel Blvd
RouteCity Street 0Q497
Coordinates34.11346, -118.08074
Functional classUrban Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2021
Inspection intervalevery 48 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span35 ft (10.7 m)
Deck width47 ft (14.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,386 (2012)
Projected traffic4,825 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Longden Ave over Eaton Wash built?

It was built in 1957, making it 68 years old in 2025.

What condition is Longden Ave over Eaton Wash 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 July 2021.

How much traffic does Longden Ave over Eaton Wash carry?

About 4,386 vehicles per day (2012 count), of which roughly 1% are trucks.

How long is Longden Ave over Eaton Wash?

The structure is 39 ft (11.9 m) long with a longest span of 35 ft (10.7 m) and a deck 47 ft wide.

Who owns Longden Ave over Eaton Wash?

It is owned by the City or Municipal Highway Agency.