US Bridges

Sc 170 over Savannah River Swamp

Fair

Jasper County, South Carolina · Nr Ga/Sc LN · Structure no. 000000000001065

Built
1940
85 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
210 ft
7 main spans
Daily traffic
3,800
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 170 over Savannah River Swamp is a concrete tee beam carrying Sc 170 over Savannah River Swamp in Jasper County, South Carolina. It was built in 1940, so it is 85 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 3,800 vehicles a day, roughly 30% of them trucks, projected to reach 4,256 by 2043. The structure is 210 ft (64 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSc 170
CrossesSavannah River Swamp
LocationNr Ga/Sc LN
RouteState Highway 170
CountyJasper County
StateSouth Carolina
Coordinates32.17862, -81.08242
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length210 ft (64 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2023)
Projected traffic4,256 by 2043
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$558,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 170 over Savannah River Swamp built?

It was built in 1940, making it 85 years old in 2025.

What condition is Sc 170 over Savannah 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 November 2023.

How much traffic does Sc 170 over Savannah River Swamp carry?

About 3,800 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is Sc 170 over Savannah River Swamp?

The structure is 210 ft (64 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns Sc 170 over Savannah River Swamp?

It is owned by the State Highway Agency.