US Bridges

Sienna Drive over Kelly Mill Branch

Good

Forsyth County, Georgia · In City Limits of Cumming · Structure no. 000000011750480

Built
2006
19 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
1,594
2024 count
Owner
County
County Highway Agency

About this bridge

Sienna Drive over Kelly Mill Branch is a concrete culvert carrying Sienna Drive over Kelly Mill Branch in Forsyth County, Georgia. It was built in 2006, so it is 19 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 1,594 vehicles a day, roughly 1% of them trucks, projected to reach 238 by 2031. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSienna Drive
CrossesKelly Mill Branch
LocationIn City Limits of Cumming
RouteCounty Highway 99999
StateGeorgia
Coordinates34.20638, -84.15933
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
Channel and channel protection7 GoodSome minor problems.
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 rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,594 (2024)
Projected traffic238 by 2031
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$141,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Sienna Drive over Kelly Mill Branch built?

It was built in 2006, making it 19 years old in 2025.

What condition is Sienna Drive over Kelly Mill Branch 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 Sienna Drive over Kelly Mill Branch carry?

About 1,594 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Sienna Drive over Kelly Mill Branch?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns Sienna Drive over Kelly Mill Branch?

It is owned by the County Highway Agency.