US Bridges

Blacks Mill Road over Black Mill Creek

Good

Dawson County, Georgia · 5 MI SW of Dawsonville · Structure no. 000000008550310

Built
2019
6 years old
Condition
Good
inspected August 2024
Type
Channel Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
150
2024 count
Owner
County
County Highway Agency

About this bridge

Blacks Mill Road over Black Mill Creek is a prestressed concrete channel beam carrying Blacks Mill Road over Black Mill Creek in Dawson County, Georgia. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, roughly 1% of them trucks, projected to reach 255 by 2032. The structure is 40 ft (12.2 m) long and 16 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesBlacks Mill Road
CrossesBlack Mill Creek
Location5 MI SW of Dawsonville
RouteCounty Highway 115
StateGeorgia
Coordinates34.35107, -84.09093
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic255 by 2032
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$5.3 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Blacks Mill Road over Black Mill Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is Blacks Mill Road over Black Mill 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 August 2024.

How much traffic does Blacks Mill Road over Black Mill Creek carry?

About 150 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Blacks Mill Road over Black Mill Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 16 ft wide.

Who owns Blacks Mill Road over Black Mill Creek?

It is owned by the County Highway Agency.