US Bridges

Topanga School RD over Garapito Crk

Fair

Los Angeles County, California · 25FT W/O Topanga Cyn Blvd · Structure no. 53C1023

Built
1953
72 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
56 ft
1 main span
Daily traffic
765
2013 count
Owner
Local
Other Local Agency

About this bridge

Topanga School RD over Garapito Crk is a concrete frame carrying Topanga School RD over Garapito Crk in Los Angeles County, California. It was built in 1953, so it is 72 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 765 vehicles a day, projected to reach 842 by 2043. The structure is 56 ft (17 m) long and 38 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTopanga School RD
CrossesGarapito Crk
Location25FT W/O Topanga Cyn Blvd
RouteCounty Highway 0
CountyLos Angeles County
StateCalifornia
Coordinates34.09123, -118.60212
Functional classRural Local

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length56 ft (17 m)
Longest span49 ft (14.9 m)
Deck width38 ft (11.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic765 (2013)
Projected traffic842 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 Topanga School RD over Garapito Crk built?

It was built in 1953, making it 72 years old in 2025.

What condition is Topanga School RD over Garapito Crk 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 March 2023.

How much traffic does Topanga School RD over Garapito Crk carry?

About 765 vehicles per day (2013 count).

How long is Topanga School RD over Garapito Crk?

The structure is 56 ft (17 m) long with a longest span of 49 ft (14.9 m) and a deck 38 ft wide.

Who owns Topanga School RD over Garapito Crk?

It is owned by the Other Local Agency.