US Bridges

S-42-591 over Middle Tyger River

Fair

Spartanburg County, South Carolina · 5.0 MI SE Duncan · Structure no. 000000000004218

Built
1963
62 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
240 ft
8 main spans
Daily traffic
2,100
2023 count
Owner
State
State Highway Agency

About this bridge

S-42-591 over Middle Tyger River is a concrete tee beam carrying S-42-591 over Middle Tyger River in Spartanburg County, South Carolina. It was built in 1963, so it is 62 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 2,100 vehicles a day, roughly 2% of them trucks, projected to reach 3,150 by 2043. The structure is 240 ft (73.2 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-42-591
CrossesMiddle Tyger River
Location5.0 MI SE Duncan
RouteState Highway 591
Coordinates34.89922, -82.05716
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 15
Structure length240 ft (73.2 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2023)
Projected traffic3,150 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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-42-591 over Middle Tyger River built?

It was built in 1963, making it 62 years old in 2025.

What condition is S-42-591 over Middle Tyger River 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 August 2023.

How much traffic does S-42-591 over Middle Tyger River carry?

About 2,100 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S-42-591 over Middle Tyger River?

The structure is 240 ft (73.2 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns S-42-591 over Middle Tyger River?

It is owned by the State Highway Agency.