Structure 1941 · Colleton County, SC

US 17 over Edisto River

Carries US 17 over Edisto River, At Jacksonboro.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT680 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 5/9

680 ft end to end, longest span 80 ft: about 1.9 football fields. 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.

Built1953rebuilt 1973
Length680.1 ft207.3 m
Daily traffic19,300counted 2023
Last inspectedFebruary 2025every 12 months

Location

StateSouth Carolina
CountyColleton
LocationAt Jacksonboro
CarriesUS 17
CrossesEdisto River
Coordinates32.76496, -80.44633

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length680.1 ft (207.3 m)
Max Span80.1 ft (24.4 m)
Deck Width75.5 ft (23 m)
Deck Area4767.9 sq m
Main Spans4
Year Built1953 (reconstructed 1973)

Traffic

Avg Daily Traffic19,300 (2023)
Truck Traffic12%
Lanes On Bridge6

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000001941

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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