US Bridges

US 17 Alt over Savanna Creek

Good

Berkeley County, South Carolina · 16.2MI NE Moncks Crn · Structure no. 000000000001429

Built
1948
77 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
4,700
2023 count
Owner
State
State Highway Agency

About this bridge

US 17 Alt over Savanna Creek is a concrete culvert carrying US 17 Alt over Savanna Creek in Berkeley County, South Carolina. It was built in 1948, so it is 77 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,700 vehicles a day, roughly 17% of them trucks, projected to reach 7,473 by 2043. The structure is 27 ft (8.2 m) long and 55 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesUS 17 Alt
CrossesSavanna Creek
Location16.2MI NE Moncks Crn
RouteU.S. Route 17
Coordinates33.28639, -79.75583
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width55 ft (16.8 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,700 (2023)
Projected traffic7,473 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 17 Alt over Savanna Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is US 17 Alt over Savanna 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 September 2023.

How much traffic does US 17 Alt over Savanna Creek carry?

About 4,700 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is US 17 Alt over Savanna Creek?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 55 ft wide.

Who owns US 17 Alt over Savanna Creek?

It is owned by the State Highway Agency.