US Bridges

US 17 Alt over Ports Creek

Fair

Georgetown County, South Carolina · 4MI W of Georgetown · Structure no. 000000000002957

Built
1919
106 years old, rebuilt 1985
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
12,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 17 Alt over Ports Creek is a concrete continuous culvert carrying US 17 Alt over Ports Creek in Georgetown County, South Carolina. It was built in 1919 and reconstructed in 1985, so it is 106 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 6 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 12,000 vehicles a day, roughly 11% of them trucks, projected to reach 20,880 by 2043. The structure is 45 ft (13.6 m) long and 138 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 17 Alt
CrossesPorts Creek
Location4MI W of Georgetown
RouteU.S. Route 17
Coordinates33.39307, -79.38059
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length45 ft (13.6 m)
Longest span10 ft (3 m)
Deck width138 ft (42.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2023)
Projected traffic20,880 by 2043
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 17 Alt over Ports Creek built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1985.

What condition is US 17 Alt over Ports Creek 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 May 2024.

How much traffic does US 17 Alt over Ports Creek carry?

About 12,000 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 17 Alt over Ports Creek?

The structure is 45 ft (13.6 m) long with a longest span of 10 ft (3 m) and a deck 138 ft wide.

Who owns US 17 Alt over Ports Creek?

It is owned by the State Highway Agency.