US Bridges

Glendora Ave over San Dimas Wash

Fair

Los Angeles County, California · 230FT N/O Arrow HWY · Structure no. 53C0804

Built
1966
59 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
13,117
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Glendora Ave over San Dimas Wash is a concrete slab carrying Glendora Ave over San Dimas Wash in Los Angeles County, California. It was built in 1966, so it is 59 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 6 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 13,117 vehicles a day, roughly 2% of them trucks, projected to reach 15,085 by 2045. The structure is 28 ft (8.5 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGlendora Ave
CrossesSan Dimas Wash
Location230FT N/O Arrow HWY
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.10754, -117.86371
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 evaluation6: Equal to 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 rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width75 ft (23 m)
Roadway width64 ft (19.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,117 (2015)
Projected traffic15,085 by 2045
Trucks2%
Lanes on structure4
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 San Dimas Wash built?

It was built in 1966, making it 59 years old in 2025.

What condition is Glendora Ave over San Dimas 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 San Dimas Wash carry?

About 13,117 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Glendora Ave over San Dimas Wash?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 75 ft wide.

Who owns Glendora Ave over San Dimas Wash?

It is owned by the City or Municipal Highway Agency.