US Bridges

S-10-91RIVER RD over Tidal Creek

Fair

Charleston County, South Carolina · 5.5 MI W of Folly Beach · Structure no. 000000000004947

Built
1967
58 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
60 ft
4 main spans
Daily traffic
6,100
2023 count
Owner
State
State Highway Agency

About this bridge

S-10-91RIVER RD over Tidal Creek is a concrete slab carrying S-10-91RIVER RD over Tidal Creek in Charleston County, South Carolina. It was built in 1967, so it is 58 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 5 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 6,100 vehicles a day, roughly 7% of them trucks, projected to reach 7,442 by 2043. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesS-10-91RIVER RD
CrossesTidal Creek
Location5.5 MI W of Folly Beach
RouteState Highway 91
CountyCharleston County
StateSouth Carolina
Coordinates32.68128, -80.02932
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length60 ft (18.3 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2023)
Projected traffic7,442 by 2043
Trucks7%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$207,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-10-91RIVER RD over Tidal Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is S-10-91RIVER RD over Tidal 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-10-91RIVER RD over Tidal Creek carry?

About 6,100 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is S-10-91RIVER RD over Tidal Creek?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-10-91RIVER RD over Tidal Creek?

It is owned by the State Highway Agency.