US Bridges

Cole Drive over Mosher Slough

Fair

San Joaquin County, California · N of Ashley Lane · Structure no. 29C0257

Built
1977
48 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
566
2013 count
Owner
County
County Highway Agency

About this bridge

Cole Drive over Mosher Slough is a concrete continuous culvert carrying Cole Drive over Mosher Slough in San Joaquin County, California. It was built in 1977, so it is 48 years old, younger 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 566 vehicles a day, roughly 15% of them trucks, projected to reach 383 by 2045. The structure is 39 ft (11.9 m) long and 59 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCole Drive
CrossesMosher Slough
LocationN of Ashley Lane
RouteCounty Highway 0
CountySan Joaquin County
StateCalifornia
Coordinates38.0429, -121.25281
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span12 ft (3.8 m)
Deck width59 ft (18 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic566 (2013)
Projected traffic383 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Cole Drive over Mosher Slough built?

It was built in 1977, making it 48 years old in 2025.

What condition is Cole Drive over Mosher Slough 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 December 2023.

How much traffic does Cole Drive over Mosher Slough carry?

About 566 vehicles per day (2013 count), of which roughly 15% are trucks.

How long is Cole Drive over Mosher Slough?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.8 m) and a deck 59 ft wide.

Who owns Cole Drive over Mosher Slough?

It is owned by the County Highway Agency.