US Bridges

Ferretti RD over Big Creek

Good

Tuolumne County, California · 3.3 MI Ne/O SR 120 · Structure no. 32C0055

Built
1970
55 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
177 ft
2 main spans
Daily traffic
1,837
2015 count
Owner
County
County Highway Agency

About this bridge

Ferretti RD over Big Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Ferretti RD over Big Creek in Tuolumne County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,837 vehicles a day, roughly 1% of them trucks, projected to reach 5,854 by 2041. The structure is 177 ft (54.1 m) long and 29 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesFerretti RD
CrossesBig Creek
Location3.3 MI Ne/O SR 120
RouteCounty Highway 0
CountyTuolumne County
StateCalifornia
Coordinates37.86356, -120.21386
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating28.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length177 ft (54.1 m)
Longest span89 ft (27.1 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,837 (2015)
Projected traffic5,854 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Ferretti RD over Big Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Ferretti RD over Big Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Ferretti RD over Big Creek carry?

About 1,837 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Ferretti RD over Big Creek?

The structure is 177 ft (54.1 m) long with a longest span of 89 ft (27.1 m) and a deck 29 ft wide.

Who owns Ferretti RD over Big Creek?

It is owned by the County Highway Agency.