US Bridges

Howard Road over San Joaquin River 01

Poor

San Joaquin County, California · 1.6 MI W of S Wolfe RD · Structure no. 29C0231

Built
1975
50 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
363 ft
3 main spans
Daily traffic
1,482
2013 count
Owner
County
County Highway Agency

About this bridge

Howard Road over San Joaquin River 01 is a prestressed concrete stringer/multi-beam or girder carrying Howard Road over San Joaquin River 01 in San Joaquin County, California. It was built in 1975, so it is 50 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 1,482 vehicles a day, roughly 5% of them trucks, projected to reach 1,637 by 2044. The structure is 363 ft (110.5 m) long and 33 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesHoward Road
CrossesSan Joaquin River 01
Location1.6 MI W of S Wolfe RD
RouteCounty Highway 0
Coordinates37.87775, -121.33261
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating44.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length363 ft (110.5 m)
Longest span120 ft (36.6 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,482 (2013)
Projected traffic1,637 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Howard Road over San Joaquin River 01 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Howard Road over San Joaquin River 01 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 September 2024.

How much traffic does Howard Road over San Joaquin River 01 carry?

About 1,482 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Howard Road over San Joaquin River 01?

The structure is 363 ft (110.5 m) long with a longest span of 120 ft (36.6 m) and a deck 33 ft wide.

Who owns Howard Road over San Joaquin River 01?

It is owned by the County Highway Agency.