US Bridges

SR 108 over Sera & Sanguinetti RD

Fair

Tuolumne County, California · 10-TUO-108-R2.02-SRA · Structure no. 32 0062

Built
1987
38 years old, rebuilt 2003
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
166 ft
2 main spans
Daily traffic
17,450
2009 count
Owner
State
State Highway Agency

About this bridge

SR 108 over Sera & Sanguinetti RD is a concrete continuous box beam or girders - multiple carrying SR 108 over Sera & Sanguinetti RD in Tuolumne County, California. It was built in 1987 and reconstructed in 2003, so it is 38 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 17,450 vehicles a day, roughly 8% of them trucks, projected to reach 34,081 by 2045. The structure is 166 ft (50.6 m) long and 69 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 108
CrossesSera & Sanguinetti RD
Location10-TUO-108-R2.02-SRA
RouteState Highway 108
CountyTuolumne County
StateCalifornia
Coordinates37.974, -120.36035
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length166 ft (50.6 m)
Longest span97 ft (29.6 m)
Deck width69 ft (21 m)
Roadway width65 ft (19.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,450 (2009)
Projected traffic34,081 by 2045
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 108 over Sera & Sanguinetti RD built?

It was built in 1987, making it 38 years old in 2025. It was reconstructed in 2003.

What condition is SR 108 over Sera & Sanguinetti 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 September 2023.

How much traffic does SR 108 over Sera & Sanguinetti RD carry?

About 17,450 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is SR 108 over Sera & Sanguinetti RD?

The structure is 166 ft (50.6 m) long with a longest span of 97 ft (29.6 m) and a deck 69 ft wide.

Who owns SR 108 over Sera & Sanguinetti RD?

It is owned by the State Highway Agency.