US Bridges

State Route 165 over Interstate 5

Fair

Merced County, California · 10-MER-165-L0.01 · Structure no. 39 0152

Built
1971
54 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
241 ft
2 main spans
Daily traffic
1,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 165 over Interstate 5 is a prestressed concrete continuous box beam or girders - multiple carrying State Route 165 over Interstate 5 in Merced County, California. It was built in 1971, so it is 54 years old, younger 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 1,800 vehicles a day, roughly 9% of them trucks, projected to reach 4,353 by 2045. The structure is 241 ft (73.5 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesState Route 165
CrossesInterstate 5
Location10-MER-165-L0.01
RouteState Highway 165
CountyMerced County
StateCalifornia
Coordinates36.93003, -120.84081
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
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating25.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length241 ft (73.5 m)
Longest span126 ft (38.5 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2009)
Projected traffic4,353 by 2045
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 165 over Interstate 5 built?

It was built in 1971, making it 54 years old in 2025.

What condition is State Route 165 over Interstate 5 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 April 2023.

How much traffic does State Route 165 over Interstate 5 carry?

About 1,800 vehicles per day (2009 count), of which roughly 9% are trucks.

How long is State Route 165 over Interstate 5?

The structure is 241 ft (73.5 m) long with a longest span of 126 ft (38.5 m) and a deck 34 ft wide.

Who owns State Route 165 over Interstate 5?

It is owned by the State Highway Agency.