US Bridges

State Route 41 over Big Creek

Fair

Mariposa County, California · 06-MPA-041-3.48 · Structure no. 40 0027

Built
1931
94 years old, rebuilt 1985
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
2 main spans
Daily traffic
2,300
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 41 over Big Creek is a steel stringer/multi-beam or girder carrying State Route 41 over Big Creek in Mariposa County, California. It was built in 1931 and reconstructed in 1985, so it is 94 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 6 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 2,300 vehicles a day, roughly 7% of them trucks, projected to reach 5,677 by 2042. The structure is 70 ft (21.2 m) long and 44 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesState Route 41
CrossesBig Creek
Location06-MPA-041-3.48
RouteState Highway 41
Coordinates37.47957, -119.637
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating31.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length70 ft (21.2 m)
Longest span33 ft (10 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2009)
Projected traffic5,677 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemYes

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 41 over Big Creek built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1985.

What condition is State Route 41 over Big 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 July 2024.

How much traffic does State Route 41 over Big Creek carry?

About 2,300 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is State Route 41 over Big Creek?

The structure is 70 ft (21.2 m) long with a longest span of 33 ft (10 m) and a deck 44 ft wide.

Who owns State Route 41 over Big Creek?

It is owned by the State Highway Agency.