US Bridges

S Polk Ave over Murphy Slough

Fair

Fresno County, California · 1.2 MI S/O Davis Ave · Structure no. 42C0366

Built
1950
75 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
69 ft
3 main spans
Daily traffic
400
2008 count
Owner
County
County Highway Agency

About this bridge

S Polk Ave over Murphy Slough is a concrete continuous slab carrying S Polk Ave over Murphy Slough in Fresno County, California. It was built in 1950, so it is 75 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 400 vehicles a day, roughly 5% of them trucks, projected to reach 512 by 2042. The structure is 69 ft (21 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesS Polk Ave
CrossesMurphy Slough
Location1.2 MI S/O Davis Ave
RouteCounty Highway 0
CountyFresno County
StateCalifornia
Coordinates36.45741, -119.89618
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length69 ft (21 m)
Longest span22 ft (6.7 m)
Deck width29 ft (8.9 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2008)
Projected traffic512 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 S Polk Ave over Murphy Slough built?

It was built in 1950, making it 75 years old in 2025.

What condition is S Polk Ave over Murphy Slough 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 January 2024.

How much traffic does S Polk Ave over Murphy Slough carry?

About 400 vehicles per day (2008 count), of which roughly 5% are trucks.

How long is S Polk Ave over Murphy Slough?

The structure is 69 ft (21 m) long with a longest span of 22 ft (6.7 m) and a deck 29 ft wide.

Who owns S Polk Ave over Murphy Slough?

It is owned by the County Highway Agency.