US Bridges

US 17 SB over South Santee River

Fair

Georgetown County, South Carolina · 15 MI S Georgetown · Structure no. 000000000001712

Built
1950
75 years old
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,655 ft
8 main spans
Daily traffic
5,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 17 SB over South Santee River is a steel continuous girder and floorbeam system carrying US 17 SB over South Santee River in Georgetown County, South Carolina. It was built in 1950, so it is 75 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 5,100 vehicles a day, roughly 16% of them trucks, projected to reach 8,874 by 2043. The structure is 1,655 ft (504.4 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 17 SB
CrossesSouth Santee River
Location15 MI S Georgetown
RouteU.S. Route 17
Coordinates33.18583, -79.40435
Functional classRural Principal Arterial - Other

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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating23.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8 (+25 approach)
Design loadHS 15
Structure length1,655 ft (504.4 m)
Longest span120 ft (36.6 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,100 (2023)
Projected traffic8,874 by 2043
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$8.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 17 SB over South Santee River built?

It was built in 1950, making it 75 years old in 2025.

What condition is US 17 SB over South Santee River 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 October 2023.

How much traffic does US 17 SB over South Santee River carry?

About 5,100 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 17 SB over South Santee River?

The structure is 1,655 ft (504.4 m) long with a longest span of 120 ft (36.6 m) and a deck 33 ft wide.

Who owns US 17 SB over South Santee River?

It is owned by the State Highway Agency.