US Bridges

State Route 49 over Oliver Creek

Fair

Mariposa County, California · 10-MPA-049-5.46 · Structure no. 40 0024

Built
1948
77 years old
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
3,725
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 49 over Oliver Creek is a steel culvert carrying State Route 49 over Oliver Creek in Mariposa County, California. It was built in 1948, so it is 77 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 3,725 vehicles a day, roughly 4% of them trucks, projected to reach 4,794 by 2046. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesState Route 49
CrossesOliver Creek
Location10-MPA-049-5.46
RouteState Highway 49
CountyMariposa County
StateCalifornia
Coordinates37.46405, -119.78296
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,725 (2009)
Projected traffic4,794 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Oliver Creek built?

It was built in 1948, making it 77 years old in 2025.

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

About 3,725 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is State Route 49 over Oliver Creek?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns State Route 49 over Oliver Creek?

It is owned by the State Highway Agency.