US Bridges

Fresno Road over Mariposa Creek

Fair

Merced County, California · 0.2 MI N Hainline Ave · Structure no. 39C0291

Built
1930
95 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
121 ft
7 main spans
Daily traffic
55
2015 count
Owner
County
County Highway Agency

About this bridge

Fresno Road over Mariposa Creek is a wood or timber stringer/multi-beam or girder carrying Fresno Road over Mariposa Creek in Merced County, California. It was built in 1930, so it is 95 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 55 vehicles a day, roughly 3% of them trucks, projected to reach 83 by 2043. The structure is 121 ft (36.9 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFresno Road
CrossesMariposa Creek
Location0.2 MI N Hainline Ave
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.23789, -120.24359
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans7
Design loadUnknown
Structure length121 ft (36.9 m)
Longest span17 ft (5.2 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2015)
Projected traffic83 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Fresno Road over Mariposa Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Fresno Road over Mariposa 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 2024.

How much traffic does Fresno Road over Mariposa Creek carry?

About 55 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Fresno Road over Mariposa Creek?

The structure is 121 ft (36.9 m) long with a longest span of 17 ft (5.2 m) and a deck 20 ft wide.

Who owns Fresno Road over Mariposa Creek?

It is owned by the County Highway Agency.