US Bridges

US 17 Alt over Scl RR & S-1

PoorClosed to traffic

Hampton County, South Carolina · In Yemassee · Structure no. 000000000000872

Built
1938
87 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
280 ft
7 main spans
Daily traffic
1,950
2023 count
Owner
State
State Highway Agency

About this bridge

US 17 Alt over Scl RR & S-1 is a steel stringer/multi-beam or girder carrying US 17 Alt over Scl RR & S-1 in Hampton County, South Carolina. It was built in 1938, so it is 87 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 1,950 vehicles a day, roughly 13% of them trucks, projected to reach 3,101 by 2043. The structure is 280 ft (85.4 m) long and 31 ft wide.

CarriesUS 17 Alt
CrossesScl RR & S-1
LocationIn Yemassee
RouteU.S. Route 17
Coordinates32.68984, -80.85032
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.8 US tons
Inventory rating42.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length280 ft (85.4 m)
Longest span42 ft (12.7 m)
Deck width31 ft (9.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,950 (2023)
Projected traffic3,101 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$410,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 17 Alt over Scl RR & S-1 built?

It was built in 1938, making it 87 years old in 2025.

What condition is US 17 Alt over Scl RR & S-1 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does US 17 Alt over Scl RR & S-1 carry?

About 1,950 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 17 Alt over Scl RR & S-1?

The structure is 280 ft (85.4 m) long with a longest span of 42 ft (12.7 m) and a deck 31 ft wide.

Who owns US 17 Alt over Scl RR & S-1?

It is owned by the State Highway Agency.