Structure 7210 · Chester County, SC

I-77 NB over Rr Lc

Carries I-77 NB over Rr Lc, 0.8 Mi NW Of Richburg.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT220 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

220 ft end to end, longest span 55 ft: about 3 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.

Built197947 years old
Length220.1 ft67.1 m
Daily traffic24,450counted 2023
Last inspectedMarch 2025every 24 months

Location

StateSouth Carolina
CountyChester
Location0.8 Mi NW Of Richburg
CarriesI-77 NB
CrossesRr Lc
Coordinates34.72208, -81.03246

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length220.1 ft (67.1 m)
Max Span55.1 ft (16.8 m)
Deck Width44.3 ft (13.5 m)
Deck Area905.9 sq m
Main Spans4
Year Built1979

Traffic

Avg Daily Traffic24,450 (2023)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007210

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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