US Bridges

State Route 49 over Moccasin Creek

Fair

Tuolumne County, California · 10-TUO-049-4.47 · Structure no. 32 0032

Built
1952
73 years old
Condition
Fair
inspected September 2023
Type
Girder and Floorbeam System
Concrete Continuous
Length
135 ft
3 main spans
Daily traffic
765
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 49 over Moccasin Creek is a concrete continuous girder and floorbeam system carrying State Route 49 over Moccasin Creek in Tuolumne County, California. It was built in 1952, so it is 73 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 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 765 vehicles a day, roughly 8% of them trucks, projected to reach 924 by 2045. The structure is 135 ft (41.1 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesState Route 49
CrossesMoccasin Creek
Location10-TUO-049-4.47
RouteState Highway 49
CountyTuolumne County
StateCalifornia
Coordinates37.79674, -120.28472
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
Deck7 GoodSome minor problems.
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
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating27.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span53 ft (16.2 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic765 (2009)
Projected traffic924 by 2045
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 49 over Moccasin Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is State Route 49 over Moccasin 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 State Route 49 over Moccasin Creek carry?

About 765 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is State Route 49 over Moccasin Creek?

The structure is 135 ft (41.1 m) long with a longest span of 53 ft (16.2 m) and a deck 30 ft wide.

Who owns State Route 49 over Moccasin Creek?

It is owned by the State Highway Agency.