US Bridges

State Route 180 over Kings Slough Overflow

Fair

Fresno County, California · 06-FRE-180-26.40 · Structure no. 42 0039

Built
1946
79 years old, rebuilt 2009
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
122 ft
7 main spans
Daily traffic
5,650
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 180 over Kings Slough Overflow is a concrete continuous slab carrying State Route 180 over Kings Slough Overflow in Fresno County, California. It was built in 1946 and reconstructed in 2009, so it is 79 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 5,650 vehicles a day, roughly 14% of them trucks, projected to reach 11,617 by 2044. The structure is 122 ft (37.2 m) long and 42 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesState Route 180
CrossesKings Slough Overflow
Location06-FRE-180-26.40
RouteState Highway 180
Coordinates36.7318, -120.35279
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span22 ft (6.8 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,650 (2009)
Projected traffic11,617 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 180 over Kings Slough Overflow built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 2009.

What condition is State Route 180 over Kings Slough Overflow 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 December 2024.

How much traffic does State Route 180 over Kings Slough Overflow carry?

About 5,650 vehicles per day (2009 count), of which roughly 14% are trucks.

How long is State Route 180 over Kings Slough Overflow?

The structure is 122 ft (37.2 m) long with a longest span of 22 ft (6.8 m) and a deck 42 ft wide.

Who owns State Route 180 over Kings Slough Overflow?

It is owned by the State Highway Agency.