US Bridges

SR 316 Ramp over I-85 I-85 Nbcd & Sbcd

Good

Gwinnett County, Georgia · 2 Miles SE of Duluth · Structure no. 000000013552140

Built
2007
18 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,602 ft
21 main spans
Daily traffic
10,700
2024 count
Owner
State
State Highway Agency

About this bridge

SR 316 Ramp over I-85 I-85 Nbcd & Sbcd is a prestressed concrete stringer/multi-beam or girder carrying SR 316 Ramp over I-85 I-85 Nbcd & Sbcd in Gwinnett County, Georgia. It was built in 2007, so it is 18 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 10,700 vehicles a day, roughly 1% of them trucks, projected to reach 12,300 by 2032. The structure is 2,602 ft (793.1 m) long and 31 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesSR 316 Ramp
CrossesI-85 I-85 Nbcd & Sbcd
Location2 Miles SE of Duluth
RouteState Highway 316
StateGeorgia
Coordinates33.96554, -84.10279
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating34.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans21
Design loadHS 20 + Mod
Structure length2,602 ft (793.1 m)
Longest span164 ft (50 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,700 (2024)
Projected traffic12,300 by 2032
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$11.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 316 Ramp over I-85 I-85 Nbcd & Sbcd built?

It was built in 2007, making it 18 years old in 2025.

What condition is SR 316 Ramp over I-85 I-85 Nbcd & Sbcd 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 February 2024.

How much traffic does SR 316 Ramp over I-85 I-85 Nbcd & Sbcd carry?

About 10,700 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 316 Ramp over I-85 I-85 Nbcd & Sbcd?

The structure is 2,602 ft (793.1 m) long with a longest span of 164 ft (50 m) and a deck 31 ft wide.

Who owns SR 316 Ramp over I-85 I-85 Nbcd & Sbcd?

It is owned by the State Highway Agency.