US Bridges

Horsely Mill Road over SR 166 South Bypass

Good

Carroll County, Georgia · 2 MI E of Carrollton · Structure no. 000000004500720

Built
1977
48 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
296 ft
4 main spans
Daily traffic
8,506
2024 count
Owner
State
State Highway Agency

About this bridge

Horsely Mill Road over SR 166 South Bypass is a steel continuous stringer/multi-beam or girder carrying Horsely Mill Road over SR 166 South Bypass in Carroll County, Georgia. It was built in 1977, so it is 48 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 8,506 vehicles a day, roughly 1% of them trucks, projected to reach 2,835 by 2031. The structure is 296 ft (90.2 m) long and 51 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesHorsely Mill Road
CrossesSR 166 South Bypass
Location2 MI E of Carrollton
RouteCity Street 812
StateGeorgia
Coordinates33.57698, -85.04168
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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length296 ft (90.2 m)
Longest span90 ft (27.4 m)
Deck width51 ft (15.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,506 (2024)
Projected traffic2,835 by 2031
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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$1.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Horsely Mill Road over SR 166 South Bypass built?

It was built in 1977, making it 48 years old in 2025.

What condition is Horsely Mill Road over SR 166 South Bypass 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 2024.

How much traffic does Horsely Mill Road over SR 166 South Bypass carry?

About 8,506 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Horsely Mill Road over SR 166 South Bypass?

The structure is 296 ft (90.2 m) long with a longest span of 90 ft (27.4 m) and a deck 51 ft wide.

Who owns Horsely Mill Road over SR 166 South Bypass?

It is owned by the State Highway Agency.