US Bridges

Oslo Road over Lateral #6

Fair

Merced County, California · 0.5 MI N August Avenue · Structure no. 39C0123

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
40
2014 count
Owner
County
County Highway Agency

About this bridge

Oslo Road over Lateral #6 is a concrete continuous slab carrying Oslo Road over Lateral #6 in Merced County, California. It was built in 1950, so it is 75 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 40 vehicles a day, roughly 2% of them trucks, projected to reach 88 by 2042. The structure is 24 ft (7.3 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesOslo Road
CrossesLateral #6
Location0.5 MI N August Avenue
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.42582, -120.85889
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span12 ft (3.7 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2014)
Projected traffic88 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Oslo Road over Lateral #6 built?

It was built in 1950, making it 75 years old in 2025.

What condition is Oslo Road over Lateral #6 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 January 2024.

How much traffic does Oslo Road over Lateral #6 carry?

About 40 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Oslo Road over Lateral #6?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m) and a deck 22 ft wide.

Who owns Oslo Road over Lateral #6?

It is owned by the County Highway Agency.