US Bridges

Hollenbeck Ave over San Dimas Wash

Fair

Los Angeles County, California · 0.4MI S/O Arrow HWY · Structure no. 53C0668

Built
1959
66 years old
Condition
Fair
inspected September 2023
Type
Frame
Concrete
Length
34 ft
1 main span
Daily traffic
13,366
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hollenbeck Ave over San Dimas Wash is a concrete frame carrying Hollenbeck Ave over San Dimas 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 13,366 vehicles a day, roughly 2% of them trucks, projected to reach 15,371 by 2041. The structure is 34 ft (10.4 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHollenbeck Ave
CrossesSan Dimas Wash
Location0.4MI S/O Arrow HWY
RouteCity Street 0Q923
CountyLos Angeles County
StateCalifornia
Coordinates34.10071, -117.89887
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
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 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 rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width72 ft (21.8 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,366 (2017)
Projected traffic15,371 by 2041
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 Hollenbeck Ave over San Dimas Wash built?

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

What condition is Hollenbeck 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 September 2023.

How much traffic does Hollenbeck Ave over San Dimas Wash carry?

About 13,366 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Hollenbeck Ave over San Dimas Wash?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 72 ft wide.

Who owns Hollenbeck Ave over San Dimas Wash?

It is owned by the City or Municipal Highway Agency.