US Bridges

S Marks Ave over Murphy Slough

Fair

Fresno County, California · 0.7 MI N Mt Whitney Ave · Structure no. 42C0163

Built
1975
50 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
43 ft
2 main spans
Daily traffic
1,400
2009 count
Owner
County
County Highway Agency

About this bridge

S Marks Ave over Murphy Slough is a concrete continuous slab carrying S Marks Ave over Murphy Slough in Fresno County, California. It was built in 1975, so it is 50 years old, younger 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 1,400 vehicles a day, roughly 16% of them trucks, projected to reach 3,336 by 2042. The structure is 43 ft (13.1 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesS Marks Ave
CrossesMurphy Slough
Location0.7 MI N Mt Whitney Ave
RouteCounty Highway 0
CountyFresno County
StateCalifornia
Coordinates36.44181, -119.85115
Functional classRural Major Collector

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 inspectionFebruary 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 rating101.1 US tons
Inventory rating60.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length43 ft (13.1 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2009)
Projected traffic3,336 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Marks Ave over Murphy Slough built?

It was built in 1975, making it 50 years old in 2025.

What condition is S Marks 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 February 2024.

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

About 1,400 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is S Marks Ave over Murphy Slough?

The structure is 43 ft (13.1 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns S Marks Ave over Murphy Slough?

It is owned by the County Highway Agency.