US Bridges

S-10-54/RIVER RD over Simmons Creek

Fair

Charleston County, South Carolina · 13.8 MI SW Charleston · Structure no. 000000000003210

Built
1994
31 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
120 ft
4 main spans
Daily traffic
7,700
2023 count
Owner
State
State Highway Agency

About this bridge

S-10-54/RIVER RD over Simmons Creek is a concrete continuous slab carrying S-10-54/RIVER RD over Simmons Creek in Charleston County, South Carolina. It was built in 1994, so it is 31 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 7,700 vehicles a day, roughly 6% of them trucks, projected to reach 9,394 by 2043. The structure is 120 ft (36.6 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesS-10-54/RIVER RD
CrossesSimmons Creek
Location13.8 MI SW Charleston
RouteState Highway 54
Coordinates32.77591, -80.08957
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,700 (2023)
Projected traffic9,394 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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-10-54/RIVER RD over Simmons Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is S-10-54/RIVER RD over Simmons 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 June 2023.

How much traffic does S-10-54/RIVER RD over Simmons Creek carry?

About 7,700 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is S-10-54/RIVER RD over Simmons Creek?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns S-10-54/RIVER RD over Simmons Creek?

It is owned by the State Highway Agency.