US Bridges

Larsen Road over Central Main Canal

Fair

Imperial County, California · 30 Ft E/O Austin RD · Structure no. 58C0207

Built
1950
75 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
46 ft
3 main spans
Daily traffic
570
2016 count
Owner
County
County Highway Agency

About this bridge

Larsen Road over Central Main Canal is a wood or timber stringer/multi-beam or girder carrying Larsen Road over Central Main Canal in Imperial County, California. It was built in 1950, so it is 75 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 570 vehicles a day, roughly 1% of them trucks, projected to reach 657 by 2045. The structure is 46 ft (14 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLarsen Road
CrossesCentral Main Canal
Location30 Ft E/O Austin RD
RouteCounty Highway 0
CountyImperial County
StateCalifornia
Coordinates32.8763, -115.5948
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length46 ft (14 m)
Longest span15 ft (4.6 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2016)
Projected traffic657 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Larsen Road over Central Main Canal built?

It was built in 1950, making it 75 years old in 2025.

What condition is Larsen Road over Central Main Canal 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 Larsen Road over Central Main Canal carry?

About 570 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Larsen Road over Central Main Canal?

The structure is 46 ft (14 m) long with a longest span of 15 ft (4.6 m) and a deck 27 ft wide.

Who owns Larsen Road over Central Main Canal?

It is owned by the County Highway Agency.