US Bridges

S-7-79 over Jarvis Creek

Good

Beaufort County, South Carolina · In Hilton Head Island · Structure no. 000000000002137

Built
2017
8 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
480 ft
12 main spans
Daily traffic
5,300
2023 count
Owner
State
State Highway Agency

About this bridge

S-7-79 over Jarvis Creek is a concrete continuous slab carrying S-7-79 over Jarvis Creek in Beaufort County, South Carolina. It was built in 2017, so it is 8 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,300 vehicles a day, roughly 3% of them trucks, projected to reach 8,056 by 2043. The structure is 480 ft (146.3 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-7-79
CrossesJarvis Creek
LocationIn Hilton Head Island
RouteState Highway 79
CountyBeaufort County
StateSouth Carolina
Coordinates32.21018, -80.74652
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHL 93
Structure length480 ft (146.3 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2023)
Projected traffic8,056 by 2043
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-7-79 over Jarvis Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is S-7-79 over Jarvis Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does S-7-79 over Jarvis Creek carry?

About 5,300 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-7-79 over Jarvis Creek?

The structure is 480 ft (146.3 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns S-7-79 over Jarvis Creek?

It is owned by the State Highway Agency.