US Bridges

Lammers Road over Delta-Mendota Canal

Fair

San Joaquin County, California · 0.8 MI S Valpico Road · Structure no. 29C0348

Built
1950
75 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
1,439
2013 count
Owner
County
County Highway Agency

About this bridge

Lammers Road over Delta-Mendota Canal is a concrete continuous tee beam carrying Lammers Road over Delta-Mendota Canal in San Joaquin 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 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 1,439 vehicles a day, roughly 10% of them trucks, projected to reach 3,071 by 2044. The structure is 108 ft (33 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesLammers Road
CrossesDelta-Mendota Canal
Location0.8 MI S Valpico Road
RouteCounty Highway 0
CountySan Joaquin County
StateCalifornia
Coordinates37.69915, -121.47647
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating18.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length108 ft (33 m)
Longest span40 ft (12.2 m)
Deck width25 ft (7.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,439 (2013)
Projected traffic3,071 by 2044
Trucks10%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lammers Road over Delta-Mendota Canal built?

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

What condition is Lammers Road over Delta-Mendota 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 June 2024.

How much traffic does Lammers Road over Delta-Mendota Canal carry?

About 1,439 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is Lammers Road over Delta-Mendota Canal?

The structure is 108 ft (33 m) long with a longest span of 40 ft (12.2 m) and a deck 25 ft wide.

Who owns Lammers Road over Delta-Mendota Canal?

It is owned by the County Highway Agency.