Structure 5350 · Marion County, SC

S-34-320 over Mill Creek Branch

Carries S-34-320 over Mill Creek Branch, 2mi E Mullins.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT45 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

45 ft end to end, longest span 15 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.

Built1968rebuilt 2020
Length44.9 ft13.7 m
Daily traffic150counted 2023
Last inspectedJune 2024every 24 months

Location

StateSouth Carolina
CountyMarion
Location2mi E Mullins
CarriesS-34-320
CrossesMill Creek Branch
Coordinates34.19889, -79.19028

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length44.9 ft (13.7 m)
Max Span15.1 ft (4.6 m)
Deck Width27.9 ft (8.5 m)
Deck Area116.5 sq m
Main Spans3
Year Built1968 (reconstructed 2020)

Traffic

Avg Daily Traffic150 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000000005350

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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