US Bridges

State Route 210 over San Dimas Cyn RD

Fair

Los Angeles County, California · 07-LA-210-R46.21-SDMS · Structure no. 53 2069

Built
1970
55 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
157 ft
1 main span
Daily traffic
193,000
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 210 over San Dimas Cyn RD is a prestressed concrete box beam or girders - multiple carrying State Route 210 over San Dimas Cyn RD in Los Angeles County, California. It was built in 1970, so it is 55 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 193,000 vehicles a day, roughly 9% of them trucks, projected to reach 399,416 by 2043. The structure is 157 ft (47.8 m) long and 148 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 210
CrossesSan Dimas Cyn RD
Location07-LA-210-R46.21-SDMS
RouteInterstate 210
Coordinates34.11958, -117.79429
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length157 ft (47.8 m)
Longest span155 ft (47.2 m)
Deck width148 ft (45.1 m)
Roadway width143 ft (43.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic193,000 (2017)
Projected traffic399,416 by 2043
Trucks9%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 210 over San Dimas Cyn RD built?

It was built in 1970, making it 55 years old in 2025.

What condition is State Route 210 over San Dimas Cyn RD 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 February 2025.

How much traffic does State Route 210 over San Dimas Cyn RD carry?

About 193,000 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is State Route 210 over San Dimas Cyn RD?

The structure is 157 ft (47.8 m) long with a longest span of 155 ft (47.2 m) and a deck 148 ft wide.

Who owns State Route 210 over San Dimas Cyn RD?

It is owned by the State Highway Agency.