US Bridges

State Route 165 over Slough No 3

Good

Merced County, California · 10-MER-165-21.52 · Structure no. 39 0207

Built
1959
66 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
5,100
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 165 over Slough No 3 is a concrete continuous culvert carrying State Route 165 over Slough No 3 in Merced County, California. It was built in 1959, so it is 66 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,100 vehicles a day, roughly 8% of them trucks, projected to reach 21,477 by 2041. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 16.2 mi (26 km).

CarriesState Route 165
CrossesSlough No 3
Location10-MER-165-21.52
RouteState Highway 165
Coordinates37.23558, -120.85199
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length32 ft (9.8 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 traffic5,100 (2009)
Projected traffic21,477 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 165 over Slough No 3 built?

It was built in 1959, making it 66 years old in 2025.

What condition is State Route 165 over Slough No 3 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does State Route 165 over Slough No 3 carry?

About 5,100 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is State Route 165 over Slough No 3?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns State Route 165 over Slough No 3?

It is owned by the State Highway Agency.