US Bridges

Flood Road over Mormon Slough

Fair

San Joaquin County, California · 0.9 MI West of Fine Road · Structure no. 29C0105

Built
1973
52 years old
Condition
Fair
inspected February 2025
Type
Tee Beam
Concrete Continuous
Length
190 ft
3 main spans
Daily traffic
401
2017 count
Owner
County
County Highway Agency

About this bridge

Flood Road over Mormon Slough is a concrete continuous tee beam carrying Flood Road over Mormon Slough in San Joaquin County, California. It was built in 1973, so it is 52 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 5 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 401 vehicles a day, roughly 20% of them trucks, projected to reach 709 by 2045. The structure is 190 ft (57.9 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFlood Road
CrossesMormon Slough
Location0.9 MI West of Fine Road
RouteCounty Highway 0
Coordinates38.01625, -121.06695
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating45 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length190 ft (57.9 m)
Longest span68 ft (20.7 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic401 (2017)
Projected traffic709 by 2045
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Flood Road over Mormon Slough built?

It was built in 1973, making it 52 years old in 2025.

What condition is Flood Road over Mormon 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 February 2025.

How much traffic does Flood Road over Mormon Slough carry?

About 401 vehicles per day (2017 count), of which roughly 20% are trucks.

How long is Flood Road over Mormon Slough?

The structure is 190 ft (57.9 m) long with a longest span of 68 ft (20.7 m) and a deck 32 ft wide.

Who owns Flood Road over Mormon Slough?

It is owned by the County Highway Agency.