US Bridges

Lampley Road over T.I.D. Main Canal

Fair

Stanislaus County, California · 0.2 MI N/O Lake RD · Structure no. 38C0158

Built
1935
90 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
78 ft
4 main spans
Daily traffic
288
2018 count
Owner
County
County Highway Agency

About this bridge

Lampley Road over T.I.D. Main Canal is a concrete continuous slab carrying Lampley Road over T.I.D. Main Canal in Stanislaus County, California. It was built in 1935, so it is 90 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 288 vehicles a day, roughly 34% of them trucks, projected to reach 408 by 2046. The structure is 78 ft (23.8 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesLampley Road
CrossesT.I.D. Main Canal
Location0.2 MI N/O Lake RD
RouteCounty Highway 0
CountyStanislaus County
StateCalifornia
Coordinates37.62646, -120.71101
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionFebruary 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating18.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length78 ft (23.8 m)
Longest span19 ft (5.8 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic288 (2018)
Projected traffic408 by 2046
Trucks34%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Lampley Road over T.I.D. Main Canal built?

It was built in 1935, making it 90 years old in 2025.

What condition is Lampley Road over T.I.D. 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 February 2024.

How much traffic does Lampley Road over T.I.D. Main Canal carry?

About 288 vehicles per day (2018 count), of which roughly 34% are trucks.

How long is Lampley Road over T.I.D. Main Canal?

The structure is 78 ft (23.8 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.

Who owns Lampley Road over T.I.D. Main Canal?

It is owned by the County Highway Agency.