US Bridges

Hamilton Mill RD over I-85 (sr 403)

Good

Gwinnett County, Georgia · 4.8 MI SE of Buford · Structure no. 000000013551920

Built
2001
24 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
221 ft
2 main spans
Daily traffic
36,000
2024 count
Owner
State
State Highway Agency

About this bridge

Hamilton Mill RD over I-85 (sr 403) is a prestressed concrete stringer/multi-beam or girder carrying Hamilton Mill RD over I-85 (sr 403) in Gwinnett County, Georgia. It was built in 2001, so it is 24 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 36,000 vehicles a day, roughly 1% of them trucks, projected to reach 51,315 by 2032. The structure is 221 ft (67.4 m) long and 86 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHamilton Mill RD
CrossesI-85 (sr 403)
Location4.8 MI SE of Buford
RouteCounty Highway 134
CountyGwinnett County
StateGeorgia
Coordinates34.07507, -83.91779
Functional classUrban Collector

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.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length221 ft (67.4 m)
Longest span111 ft (33.8 m)
Deck width86 ft (26.2 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,000 (2024)
Projected traffic51,315 by 2032
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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$2.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Hamilton Mill RD over I-85 (sr 403) built?

It was built in 2001, making it 24 years old in 2025.

What condition is Hamilton Mill RD over I-85 (sr 403) 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 November 2023.

How much traffic does Hamilton Mill RD over I-85 (sr 403) carry?

About 36,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Hamilton Mill RD over I-85 (sr 403)?

The structure is 221 ft (67.4 m) long with a longest span of 111 ft (33.8 m) and a deck 86 ft wide.

Who owns Hamilton Mill RD over I-85 (sr 403)?

It is owned by the State Highway Agency.