US Bridges

Sutter Street over Mormon Slough

Fair

San Joaquin County, California · 0.5 MI N Charter Way · Structure no. 29C0232

Built
1915
110 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
204 ft
8 main spans
Daily traffic
2,700
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sutter Street over Mormon Slough is a concrete continuous slab carrying Sutter Street over Mormon Slough in San Joaquin County, California. It was built in 1915, so it is 110 years old, older 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 2,700 vehicles a day, roughly 5% of them trucks, projected to reach 1,604 by 2045. The structure is 204 ft (62.2 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSutter Street
CrossesMormon Slough
Location0.5 MI N Charter Way
RouteCity Street 0
Coordinates37.94662, -121.28395
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating37.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length204 ft (62.2 m)
Longest span26 ft (7.9 m)
Deck width48 ft (14.5 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2019)
Projected traffic1,604 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sutter Street over Mormon Slough built?

It was built in 1915, making it 110 years old in 2025.

What condition is Sutter Street 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 January 2025.

How much traffic does Sutter Street over Mormon Slough carry?

About 2,700 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Sutter Street over Mormon Slough?

The structure is 204 ft (62.2 m) long with a longest span of 26 ft (7.9 m) and a deck 48 ft wide.

Who owns Sutter Street over Mormon Slough?

It is owned by the City or Municipal Highway Agency.