US Bridges

Glendora Ave over Big Dalton Wash

Fair

Los Angeles County, California · 0.5MI S/O Alosta Ave · Structure no. 53C0682

Built
1960
65 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
37 ft
1 main span
Daily traffic
18,334
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Glendora Ave over Big Dalton Wash is a concrete slab carrying Glendora Ave over Big Dalton Wash in Los Angeles County, California. It was built in 1960, so it is 65 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 18,334 vehicles a day, roughly 1% of them trucks, projected to reach 22,001 by 2045. The structure is 37 ft (11.3 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGlendora Ave
CrossesBig Dalton Wash
Location0.5MI S/O Alosta Ave
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.12193, -117.86382
Functional classUrban Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 2025
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span34 ft (10.4 m)
Deck width72 ft (21.9 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,334 (2015)
Projected traffic22,001 by 2045
Trucks1%
Lanes on structure5
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 Glendora Ave over Big Dalton Wash built?

It was built in 1960, making it 65 years old in 2025.

What condition is Glendora 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 January 2025.

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

About 18,334 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Glendora Ave over Big Dalton Wash?

The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.4 m) and a deck 72 ft wide.

Who owns Glendora Ave over Big Dalton Wash?

It is owned by the City or Municipal Highway Agency.