US Bridges

S-20-28 over Mobley Creek

Fair

Fairfield County, South Carolina · 12.2 MI NW Winnsboro · Structure no. 000000000008070

Built
1987
38 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
225 ft
1 main span
Daily traffic
25
2023 count
Owner
State
State Highway Agency

About this bridge

S-20-28 over Mobley Creek is a steel stringer/multi-beam or girder carrying S-20-28 over Mobley Creek in Fairfield County, South Carolina. It was built in 1987, so it is 38 years old, younger 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 25 vehicles a day, projected to reach 35 by 2043. The structure is 225 ft (68.6 m) long and 37 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesS-20-28
CrossesMobley Creek
Location12.2 MI NW Winnsboro
RouteState Highway 28
Coordinates34.51732, -81.22285
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+5 approach)
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span75 ft (22.9 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic35 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

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 S-20-28 over Mobley Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is S-20-28 over Mobley 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 April 2023.

How much traffic does S-20-28 over Mobley Creek carry?

About 25 vehicles per day (2023 count).

How long is S-20-28 over Mobley Creek?

The structure is 225 ft (68.6 m) long with a longest span of 75 ft (22.9 m) and a deck 37 ft wide.

Who owns S-20-28 over Mobley Creek?

It is owned by the State Highway Agency.