US Bridges

Lake Road over Highline Canal

Fair

Stanislaus County, California · 0.6 M E/O Lampley RD · Structure no. 38C0280

Built
1959
66 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
1,504
2019 count
Owner
County
County Highway Agency

About this bridge

Lake Road over Highline Canal is a concrete continuous culvert carrying Lake Road over Highline Canal in Stanislaus 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 6 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 1,504 vehicles a day, roughly 16% of them trucks, projected to reach 1,744 by 2043. The structure is 27 ft (8.2 m) long and 28 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesLake Road
CrossesHighline Canal
Location0.6 M E/O Lampley RD
RouteCounty Highway 0
CountyStanislaus County
StateCalifornia
Coordinates37.62374, -120.7004
Functional classRural Minor 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating19 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span13 ft (4 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,504 (2019)
Projected traffic1,744 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Lake Road over Highline Canal built?

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

What condition is Lake Road over Highline 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 February 2025.

How much traffic does Lake Road over Highline Canal carry?

About 1,504 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is Lake Road over Highline Canal?

The structure is 27 ft (8.2 m) long with a longest span of 13 ft (4 m) and a deck 28 ft wide.

Who owns Lake Road over Highline Canal?

It is owned by the County Highway Agency.