US Bridges

Willms Road over Main Creek

Fair

Stanislaus County, California · 1.2 MI SE JCT SR 120 · Structure no. 38C0253

Built
1929
96 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
66 ft
4 main spans
Daily traffic
85
2017 count
Owner
County
County Highway Agency

About this bridge

Willms Road over Main Creek is a concrete continuous tee beam carrying Willms Road over Main Creek in Stanislaus County, California. It was built in 1929, so it is 96 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 6 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 85 vehicles a day, roughly 20% of them trucks, projected to reach 216 by 2045. The structure is 66 ft (20.1 m) long and 22 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesWillms Road
CrossesMain Creek
Location1.2 MI SE JCT SR 120
RouteCounty Highway 0
CountyStanislaus County
StateCalifornia
Coordinates37.80053, -120.64561
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length66 ft (20.1 m)
Longest span16 ft (4.9 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2017)
Projected traffic216 by 2045
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 Willms Road over Main Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is Willms Road over Main Creek 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 September 2023.

How much traffic does Willms Road over Main Creek carry?

About 85 vehicles per day (2017 count), of which roughly 20% are trucks.

How long is Willms Road over Main Creek?

The structure is 66 ft (20.1 m) long with a longest span of 16 ft (4.9 m) and a deck 22 ft wide.

Who owns Willms Road over Main Creek?

It is owned by the County Highway Agency.