US Bridges

S-137 over Calabash Branch

Fair

McCormick County, South Carolina · 8.5 MI NE of Mccormick · Structure no. 000000000010193

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
20 ft
1 main span
Daily traffic
125
2023 count
Owner
State
State Highway Agency

About this bridge

S-137 over Calabash Branch is a wood or timber stringer/multi-beam or girder carrying S-137 over Calabash Branch in McCormick County, South Carolina. It was built in 1960, so it is 65 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 125 vehicles a day, roughly 8% of them trucks, projected to reach 183 by 2043. The structure is 20 ft (6.1 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesS-137
CrossesCalabash Branch
Location8.5 MI NE of Mccormick
RouteState Highway 137
CountyMcCormick County
StateSouth Carolina
Coordinates34.00874, -82.2458
Functional classRural Major 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width19 ft (5.9 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2023)
Projected traffic183 by 2043
Trucks8%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$78,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-137 over Calabash Branch built?

It was built in 1960, making it 65 years old in 2025.

What condition is S-137 over Calabash Branch 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 June 2024.

How much traffic does S-137 over Calabash Branch carry?

About 125 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-137 over Calabash Branch?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 19 ft wide.

Who owns S-137 over Calabash Branch?

It is owned by the State Highway Agency.