US Bridges

US-1/ SR-4 (nbl) over Cobb Creek

Good

Toombs County, Georgia · 11 Miles South of Lyons · Structure no. 000000027950370

Built
2021
4 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
360 ft
4 main spans
Daily traffic
3,350
2024 count
Owner
State
State Highway Agency

About this bridge

US-1/ SR-4 (nbl) over Cobb Creek is a prestressed concrete stringer/multi-beam or girder carrying US-1/ SR-4 (nbl) over Cobb Creek in Toombs County, Georgia. It was built in 2021, so it is 4 years old, younger 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 3,350 vehicles a day, roughly 24% of them trucks, projected to reach 4,150 by 2040. The structure is 360 ft (109.7 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-1/ SR-4 (nbl)
CrossesCobb Creek
Location11 Miles South of Lyons
RouteU.S. Route 1
StateGeorgia
Coordinates32.02031, -82.3464
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating40.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length360 ft (109.7 m)
Longest span90 ft (27.4 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,350 (2024)
Projected traffic4,150 by 2040
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$48 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US-1/ SR-4 (nbl) over Cobb Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is US-1/ SR-4 (nbl) over Cobb 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 June 2023.

How much traffic does US-1/ SR-4 (nbl) over Cobb Creek carry?

About 3,350 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is US-1/ SR-4 (nbl) over Cobb Creek?

The structure is 360 ft (109.7 m) long with a longest span of 90 ft (27.4 m) and a deck 39 ft wide.

Who owns US-1/ SR-4 (nbl) over Cobb Creek?

It is owned by the State Highway Agency.