US Bridges

Irwindale Ave over Big Dalton Wash

Fair

Los Angeles County, California · 0.8MI S/O Arrow HWY · Structure no. 53C0495

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
23,745
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Irwindale Ave over Big Dalton Wash is a prestressed concrete stringer/multi-beam or girder carrying Irwindale Ave over Big Dalton Wash in Los Angeles County, California. It was built in 1959, so it is 66 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 23,745 vehicles a day, roughly 3% of them trucks, projected to reach 28,494 by 2041. The structure is 72 ft (21.9 m) long and 92 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIrwindale Ave
CrossesBig Dalton Wash
Location0.8MI S/O Arrow HWY
RouteCity Street 0L374
CountyLos Angeles County
StateCalifornia
Coordinates34.097, -117.93408
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 protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span66 ft (20.1 m)
Deck width92 ft (28.1 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,745 (2017)
Projected traffic28,494 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Irwindale Ave over Big Dalton Wash built?

It was built in 1959, making it 66 years old in 2025.

What condition is Irwindale Ave over Big Dalton Wash 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 April 2023.

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

About 23,745 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Irwindale Ave over Big Dalton Wash?

The structure is 72 ft (21.9 m) long with a longest span of 66 ft (20.1 m) and a deck 92 ft wide.

Who owns Irwindale Ave over Big Dalton Wash?

It is owned by the City or Municipal Highway Agency.