US Bridges

S-46-51 over Unnamed Stream

Fair

York County, South Carolina · Rock Hill · Structure no. 000000000005637

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
25
2023 count
Owner
State
State Highway Agency

About this bridge

S-46-51 over Unnamed Stream is a concrete culvert carrying S-46-51 over Unnamed Stream in York County, South Carolina. It was built in 1969, so it is 56 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 25 vehicles a day, projected to reach 32 by 2043. The structure is 30 ft (9.1 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS-46-51
CrossesUnnamed Stream
LocationRock Hill
RouteState Highway 51
CountyYork County
StateSouth Carolina
Coordinates34.935, -81.01056
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating58.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length30 ft (9.1 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic32 by 2043
Trucks0%
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-46-51 over Unnamed Stream built?

It was built in 1969, making it 56 years old in 2025.

What condition is S-46-51 over Unnamed Stream 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 2024.

How much traffic does S-46-51 over Unnamed Stream carry?

About 25 vehicles per day (2023 count).

How long is S-46-51 over Unnamed Stream?

The structure is 30 ft (9.1 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns S-46-51 over Unnamed Stream?

It is owned by the State Highway Agency.