Structure 42C0163 · Fresno County, CA

S Marks AVE over Murphy Slough

Carries S Marks AVE over Murphy Slough, 0.7 Mi N Mt Whitney AVE.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT43 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

43 ft end to end, longest span 20 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built197551 years old
Length43.0 ft13.1 m
Daily traffic1,400counted 2009
Last inspectedFebruary 2024every 24 months

Location

StateCalifornia
CountyFresno
Location0.7 Mi N Mt Whitney AVE
CarriesS Marks AVE
CrossesMurphy Slough
Coordinates36.44181, -119.85115

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length43.0 ft (13.1 m)
Max Span20.0 ft (6.1 m)
Deck Width32.5 ft (9.9 m)
Deck Area129.7 sq m
Main Spans2
Year Built1975

Traffic

Avg Daily Traffic1,400 (2009)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number42C0163

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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