US Bridges

US 17 SR 25 Ocean over Thornhill Creek

Good

Glynn County, Georgia · 5 MI N of Brunswick · Structure no. 000000012700090

Built
1955
70 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete
Length
81 ft
3 main spans
Daily traffic
13,600
2024 count
Owner
State
State Highway Agency

About this bridge

US 17 SR 25 Ocean over Thornhill Creek is a concrete tee beam carrying US 17 SR 25 Ocean over Thornhill Creek in Glynn County, Georgia. It was built in 1955, so it is 70 years old, older than the Georgia average of 47.5 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 13,600 vehicles a day, roughly 4% of them trucks, projected to reach 20,175 by 2031. The structure is 81 ft (24.7 m) long and 34 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesUS 17 SR 25 Ocean
CrossesThornhill Creek
Location5 MI N of Brunswick
RouteU.S. Route 17
StateGeorgia
Coordinates31.24514, -81.44964
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating26.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length81 ft (24.7 m)
Longest span27 ft (8.2 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,600 (2024)
Projected traffic20,175 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$475,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 17 SR 25 Ocean over Thornhill Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is US 17 SR 25 Ocean over Thornhill 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 October 2024.

How much traffic does US 17 SR 25 Ocean over Thornhill Creek carry?

About 13,600 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is US 17 SR 25 Ocean over Thornhill Creek?

The structure is 81 ft (24.7 m) long with a longest span of 27 ft (8.2 m) and a deck 34 ft wide.

Who owns US 17 SR 25 Ocean over Thornhill Creek?

It is owned by the State Highway Agency.