US Bridges

S-16-290 over Boggy Gully Swamp

Poor

Darlington County, South Carolina · 3MI N Lamar · Structure no. 000000000007345

Built
1980
45 years old
Condition
Poor
inspected February 2025
Type
Slab
Concrete
Length
90 ft
6 main spans
Daily traffic
275
2023 count
Owner
State
State Highway Agency

About this bridge

S-16-290 over Boggy Gully Swamp is a concrete slab carrying S-16-290 over Boggy Gully Swamp in Darlington County, South Carolina. It was built in 1980, so it is 45 years old, younger 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.

It carries about 275 vehicles a day, roughly 4% of them trucks, projected to reach 352 by 2043. The structure is 90 ft (27.4 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS-16-290
CrossesBoggy Gully Swamp
Location3MI N Lamar
RouteState Highway 290
Coordinates34.2189, -80.06739
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating26.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadH 15
Structure length90 ft (27.4 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic352 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-16-290 over Boggy Gully Swamp built?

It was built in 1980, making it 45 years old in 2025.

What condition is S-16-290 over Boggy Gully Swamp 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 February 2025.

How much traffic does S-16-290 over Boggy Gully Swamp carry?

About 275 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is S-16-290 over Boggy Gully Swamp?

The structure is 90 ft (27.4 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns S-16-290 over Boggy Gully Swamp?

It is owned by the State Highway Agency.