US Bridges

S-31-228 over Black River

PoorPosted for load

Lee County, South Carolina · 7 MI S of Bishopville · Structure no. 000000000004603

Built
1965
60 years old
Condition
Poor
inspected August 2024
Type
Slab
Concrete
Length
135 ft
9 main spans
Daily traffic
125
2023 count
Owner
State
State Highway Agency

About this bridge

S-31-228 over Black River is a concrete slab carrying S-31-228 over Black River in Lee County, South Carolina. It was built in 1965, so it is 60 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: posted for load restriction.

It carries about 125 vehicles a day, roughly 5% of them trucks, projected to reach 160 by 2043. The structure is 135 ft (41.1 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesS-31-228
CrossesBlack River
Location7 MI S of Bishopville
RouteState Highway 228
Coordinates34.11568, -80.21604
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans9
Design loadH 10
Structure length135 ft (41.1 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2023)
Projected traffic160 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$599,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-31-228 over Black River built?

It was built in 1965, making it 60 years old in 2025.

What condition is S-31-228 over Black River 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 August 2024.

How much traffic does S-31-228 over Black River carry?

About 125 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-31-228 over Black River?

The structure is 135 ft (41.1 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-31-228 over Black River?

It is owned by the State Highway Agency.