US Bridges

State Route 180 over Byrd Slough

Good

Fresno County, California · 06-FRE-180-77.20 · Structure no. 42 0437

Built
2020
5 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
160 ft
5 main spans
Daily traffic
8,850
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 180 over Byrd Slough is a 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 8,850 vehicles a day, roughly 11% of them trucks, projected to reach 21,037 by 2043. The structure is 160 ft (48.8 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesState Route 180
CrossesByrd Slough
Location06-FRE-180-77.20
RouteState Highway 180
CountyFresno County
StateCalifornia
Coordinates36.72447, -119.45853
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 geometry4: Meets minimum tolerable limits to be left in place as is
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
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadGreater than HL 93
Structure length160 ft (48.8 m)
Longest span35 ft (10.8 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,850 (2009)
Projected traffic21,037 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-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 8,850 vehicles per day (2009 count), of which roughly 11% are trucks.

How long is State Route 180 over Byrd Slough?

The structure is 160 ft (48.8 m) long with a longest span of 35 ft (10.8 m) and a deck 35 ft wide.

Who owns State Route 180 over Byrd Slough?

It is owned by the State Highway Agency.