US Bridges

Azusa Ave over Big Dalton Wash

Poor

Los Angeles County, California · 0.1MI S/O Arrow HWY · Structure no. 53C2047

Built
1941
84 years old, rebuilt 1959
Condition
Poor
inspected September 2023
Type
Tee Beam
Concrete
Length
115 ft
3 main spans
Daily traffic
35,490
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Azusa Ave over Big Dalton Wash is a concrete tee beam carrying Azusa Ave over Big Dalton Wash in Los Angeles County, California. It was built in 1941 and reconstructed in 1959, so it is 84 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 35,490 vehicles a day, roughly 3% of them trucks, projected to reach 42,588 by 2041. The structure is 115 ft (35.1 m) long and 98 ft wide.

Location

Open in Google Maps
CarriesAzusa Ave
CrossesBig Dalton Wash
Location0.1MI S/O Arrow HWY
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.10566, -117.90752
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length115 ft (35.1 m)
Longest span81 ft (24.7 m)
Deck width98 ft (29.9 m)
Roadway width69 ft (20.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,490 (2017)
Projected traffic42,588 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 Azusa Ave over Big Dalton Wash built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1959.

What condition is Azusa Ave over Big Dalton Wash in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Azusa Ave over Big Dalton Wash carry?

About 35,490 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Azusa Ave over Big Dalton Wash?

The structure is 115 ft (35.1 m) long with a longest span of 81 ft (24.7 m) and a deck 98 ft wide.

Who owns Azusa Ave over Big Dalton Wash?

It is owned by the City or Municipal Highway Agency.