US Bridges

Don Ave over Mosher Slough

Poor

San Joaquin County, California · 0.1 MI S Waudman Ave · Structure no. 29C0096

Built
1976
49 years old
Condition
Poor
inspected January 2024
Type
Slab
Concrete Continuous
Length
71 ft
2 main spans
Daily traffic
10,641
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Don Ave over Mosher Slough is a concrete continuous slab carrying Don Ave over Mosher Slough in San Joaquin County, California. It was built in 1976, so it is 49 years old, younger 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 10,641 vehicles a day, roughly 2% of them trucks, projected to reach 21,377 by 2042. The structure is 71 ft (21.6 m) long and 49 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDon Ave
CrossesMosher Slough
Location0.1 MI S Waudman Ave
RouteCity Street 0
CountySan Joaquin County
StateCalifornia
Coordinates38.0283, -121.34545
Functional classUrban Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span34 ft (10.4 m)
Deck width49 ft (14.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,641 (2010)
Projected traffic21,377 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$540,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Don Ave over Mosher Slough built?

It was built in 1976, making it 49 years old in 2025.

What condition is Don Ave over Mosher Slough 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 January 2024.

How much traffic does Don Ave over Mosher Slough carry?

About 10,641 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Don Ave over Mosher Slough?

The structure is 71 ft (21.6 m) long with a longest span of 34 ft (10.4 m) and a deck 49 ft wide.

Who owns Don Ave over Mosher Slough?

It is owned by the City or Municipal Highway Agency.