US Bridges

West Lane over Calaveras River

Poor

San Joaquin County, California · 0.5 MI N Fulton ST · Structure no. 29C0157R

Built
1966
59 years old
Condition
Poor
inspected February 2025
Type
Slab
Concrete Continuous
Length
286 ft
11 main spans
Daily traffic
41,000
2007 count
Owner
City
City or Municipal Highway Agency

About this bridge

West Lane over Calaveras River is a concrete continuous slab carrying West Lane over Calaveras River in San Joaquin County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 41,000 vehicles a day, roughly 11% of them trucks, projected to reach 22,803 by 2047. The structure is 286 ft (87.2 m) long and 48 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesWest Lane
CrossesCalaveras River
Location0.5 MI N Fulton ST
RouteCounty Highway 0
Coordinates37.99252, -121.28676
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length286 ft (87.2 m)
Longest span26 ft (7.9 m)
Deck width48 ft (14.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,000 (2007)
Projected traffic22,803 by 2047
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.1 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was West Lane over Calaveras River built?

It was built in 1966, making it 59 years old in 2025.

What condition is West Lane over Calaveras River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2025.

How much traffic does West Lane over Calaveras River carry?

About 41,000 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is West Lane over Calaveras River?

The structure is 286 ft (87.2 m) long with a longest span of 26 ft (7.9 m) and a deck 48 ft wide.

Who owns West Lane over Calaveras River?

It is owned by the City or Municipal Highway Agency and maintained by the County Highway Agency.