Structure 6573 · Richland County, SC

Sc 277 SB over I-20

Carries Sc 277 SB over I-20, 6 Mi NE Of Cola.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT368 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

368 ft end to end, longest span 118 ft: about 5 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built197452 years old
Length368.1 ft112.2 m
Daily traffic26,700counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateSouth Carolina
CountyRichland
Location6 Mi NE Of Cola
CarriesSc 277 SB
CrossesI-20
Coordinates34.07331, -80.97052

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length368.1 ft (112.2 m)
Max Span118.1 ft (36 m)
Deck Width42.7 ft (13 m)
Deck Area1458.6 sq m
Main Spans4
Year Built1974

Traffic

Avg Daily Traffic26,700 (2023)
Truck Traffic2%
Lanes On Bridge2
Lanes Under Bridge8

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000006573

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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