US Bridges

Sc 61/AUGUSTA HWY over Edisto River Swamp

Fair

Colleton County, South Carolina · 2MINW Coll/Dorch CO LN · Structure no. 000000000001616

Built
1949
76 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
500 ft
16 main spans
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 61/AUGUSTA HWY over Edisto River Swamp is a concrete tee beam carrying Sc 61/AUGUSTA HWY over Edisto River Swamp in Colleton County, South Carolina. It was built in 1949, so it is 76 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,000 vehicles a day, roughly 14% of them trucks, projected to reach 4,770 by 2043. The structure is 500 ft (152.4 m) long and 32 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesSc 61/AUGUSTA HWY
CrossesEdisto River Swamp
Location2MINW Coll/Dorch CO LN
RouteState Highway 61
CountyColleton County
StateSouth Carolina
Coordinates33.03201, -80.39973
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating32.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans16
Design loadHS 15
Structure length500 ft (152.4 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,770 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 61/AUGUSTA HWY over Edisto River Swamp built?

It was built in 1949, making it 76 years old in 2025.

What condition is Sc 61/AUGUSTA HWY over Edisto River Swamp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2024.

How much traffic does Sc 61/AUGUSTA HWY over Edisto River Swamp carry?

About 3,000 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Sc 61/AUGUSTA HWY over Edisto River Swamp?

The structure is 500 ft (152.4 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns Sc 61/AUGUSTA HWY over Edisto River Swamp?

It is owned by the State Highway Agency.