US Bridges

Larson Lane over Irrigation Canal

Good

Mono County, California · 1.2 MI E RTE 395 Pm 110 · Structure no. 47C0036

Built
1952
73 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
20 ft
1 main span
Daily traffic
104
2019 count
Owner
County
County Highway Agency

About this bridge

Larson Lane over Irrigation Canal is a steel stringer/multi-beam or girder carrying Larson Lane over Irrigation Canal in Mono County, California. It was built in 1952, so it is 73 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 104 vehicles a day, roughly 2% of them trucks, projected to reach 189 by 2042. The structure is 20 ft (6.1 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesLarson Lane
CrossesIrrigation Canal
Location1.2 MI E RTE 395 Pm 110
RouteCounty Highway 0
CountyMono County
StateCalifornia
Coordinates38.54576, -119.4794
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104 (2019)
Projected traffic189 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Larson Lane over Irrigation Canal built?

It was built in 1952, making it 73 years old in 2025.

What condition is Larson Lane over Irrigation Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Larson Lane over Irrigation Canal carry?

About 104 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Larson Lane over Irrigation Canal?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns Larson Lane over Irrigation Canal?

It is owned by the County Highway Agency.