US Bridges

9th Street over Tuolumne River River RD

Fair

Stanislaus County, California · 0.1 MI N/O River Rd. · Structure no. 38C0330

Built
2004
21 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
2,011 ft
16 main spans
Daily traffic
24,390
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

9th Street over Tuolumne River River RD is a prestressed concrete box beam or girders - multiple carrying 9th Street over Tuolumne River River RD in Stanislaus County, California. It was built in 2004, so it is 21 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 24,390 vehicles a day, roughly 4% of them trucks, projected to reach 35,000 by 2042. The structure is 2,011 ft (613 m) long and 83 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries9th Street
CrossesTuolumne River River RD
Location0.1 MI N/O River Rd.
RouteCity Street 0
Coordinates37.62641, -120.98695
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans16
Design loadHS 20 + Mod
Structure length2,011 ft (613 m)
Longest span203 ft (62 m)
Deck width83 ft (25.4 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,390 (2018)
Projected traffic35,000 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
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 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 9th Street over Tuolumne River River RD built?

It was built in 2004, making it 21 years old in 2025.

What condition is 9th Street over Tuolumne River River RD 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 August 2024.

How much traffic does 9th Street over Tuolumne River River RD carry?

About 24,390 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is 9th Street over Tuolumne River River RD?

The structure is 2,011 ft (613 m) long with a longest span of 203 ft (62 m) and a deck 83 ft wide.

Who owns 9th Street over Tuolumne River River RD?

It is owned by the City or Municipal Highway Agency.