US Bridges

Union Hill Road over Big Creek

Good

Forsyth County, Georgia · 6.7 MI SW of Cumming · Structure no. 000000011750170

Built
1985
40 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
62 ft
5 main spans
Daily traffic
5,450
2024 count
Owner
County
County Highway Agency

About this bridge

Union Hill Road over Big Creek is a concrete culvert carrying Union Hill Road over Big Creek in Forsyth County, Georgia. It was built in 1985, so it is 40 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 5,450 vehicles a day, roughly 1% of them trucks, projected to reach 5,070 by 2032. The structure is 62 ft (18.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUnion Hill Road
CrossesBig Creek
Location6.7 MI SW of Cumming
RouteCounty Highway 456
StateGeorgia
Coordinates34.13494, -84.21699
Functional classUrban Local

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,450 (2024)
Projected traffic5,070 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$363,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Hill Road over Big Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Union Hill Road over Big 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 May 2023.

How much traffic does Union Hill Road over Big Creek carry?

About 5,450 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Union Hill Road over Big Creek?

The structure is 62 ft (18.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Union Hill Road over Big Creek?

It is owned by the County Highway Agency.