US Bridges

State Route 180 over Byrd Slough

Good

Fresno County, California · 06-FRE-180-R77.19 · Structure no. 42 0437R

Built
2020
5 years old
Condition
Good
inspected October 2023
Type
Slab
Prestressed Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
4,425
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 180 over Byrd Slough is a prestressed concrete continuous slab carrying State Route 180 over Byrd Slough in Fresno County, California. It was built in 2020, so it is 5 years old, younger 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 4,425 vehicles a day, roughly 11% of them trucks, projected to reach 10,517 by 2043. The structure is 162 ft (49.4 m) long and 80 ft wide.

CarriesState Route 180
CrossesByrd Slough
Location06-FRE-180-R77.19
RouteState Highway 180
Coordinates36.72503, -119.45706
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length162 ft (49.4 m)
Longest span63 ft (19.2 m)
Deck width80 ft (24.3 m)
Roadway width77 ft (23.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,425 (2009)
Projected traffic10,517 by 2043
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 180 over Byrd Slough built?

It was built in 2020, making it 5 years old in 2025.

What condition is State Route 180 over Byrd Slough 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 October 2023.

How much traffic does State Route 180 over Byrd Slough carry?

About 4,425 vehicles per day (2009 count), of which roughly 11% are trucks.

How long is State Route 180 over Byrd Slough?

The structure is 162 ft (49.4 m) long with a longest span of 63 ft (19.2 m) and a deck 80 ft wide.

Who owns State Route 180 over Byrd Slough?

It is owned by the State Highway Agency.