US Bridges

State Route 108 over SR 49 NB & Woods Creek

Good

Tuolumne County, California · 10-TUO-108-R0.03-SRA · Structure no. 32 0059

Built
1987
38 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
253 ft
3 main spans
Daily traffic
17,450
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 108 over SR 49 NB & Woods Creek is a prestressed concrete continuous box beam or girders - multiple carrying State Route 108 over SR 49 NB & Woods Creek in Tuolumne County, California. It was built in 1987, 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 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 17,450 vehicles a day, roughly 8% of them trucks, projected to reach 34,081 by 2045. The structure is 253 ft (77.1 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 108
CrossesSR 49 NB & Woods Creek
Location10-TUO-108-R0.03-SRA
RouteState Highway 108
Coordinates37.9652, -120.39342
Functional classRural Minor Arterial

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 protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length253 ft (77.1 m)
Longest span105 ft (32 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,450 (2009)
Projected traffic34,081 by 2045
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 108 over SR 49 NB & Woods Creek built?

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

What condition is State Route 108 over SR 49 NB & Woods 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 September 2023.

How much traffic does State Route 108 over SR 49 NB & Woods Creek carry?

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

How long is State Route 108 over SR 49 NB & Woods Creek?

The structure is 253 ft (77.1 m) long with a longest span of 105 ft (32 m) and a deck 44 ft wide.

Who owns State Route 108 over SR 49 NB & Woods Creek?

It is owned by the State Highway Agency.