US Bridges

Cooperstown Road over Rydberg Creek

Poor

Stanislaus County, California · 3.9 MI NW LA Grange RD · Structure no. 38C0257

Built
1922
103 years old
Condition
Poor
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
60 ft
3 main spans
Daily traffic
37
2018 count
Owner
County
County Highway Agency

About this bridge

Cooperstown Road over Rydberg Creek is a concrete continuous tee beam carrying Cooperstown Road over Rydberg Creek in Stanislaus County, California. It was built in 1922, so it is 103 years old, older 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 37 vehicles a day, roughly 26% of them trucks, projected to reach 105 by 2042. The structure is 60 ft (18.3 m) long and 22 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesCooperstown Road
CrossesRydberg Creek
Location3.9 MI NW LA Grange RD
RouteCounty Highway 0
CountyStanislaus County
StateCalifornia
Coordinates37.71867, -120.52012
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.4 US tons
Inventory rating14.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (2018)
Projected traffic105 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$479,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cooperstown Road over Rydberg Creek built?

It was built in 1922, making it 103 years old in 2025.

What condition is Cooperstown Road over Rydberg Creek 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 2023.

How much traffic does Cooperstown Road over Rydberg Creek carry?

About 37 vehicles per day (2018 count), of which roughly 26% are trucks.

How long is Cooperstown Road over Rydberg Creek?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Cooperstown Road over Rydberg Creek?

It is owned by the County Highway Agency.