US Bridges

SR20 over HWY 316

Good

Gwinnett County, Georgia · In Lawrenceville · Structure no. 000000013552580

Built
2016
9 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
359 ft
4 main spans
Daily traffic
53,100
2024 count
Owner
State
State Highway Agency

About this bridge

SR20 over HWY 316 is a prestressed concrete stringer/multi-beam or girder carrying SR20 over HWY 316 in Gwinnett County, Georgia. It was built in 2016, so it is 9 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 53,100 vehicles a day, roughly 1% of them trucks, projected to reach 38,595 by 2032. The structure is 359 ft (109.3 m) long and 138 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSR20
CrossesHWY 316
LocationIn Lawrenceville
RouteState Highway 20
StateGeorgia
Coordinates33.97926, -83.98542
Functional classUrban Other Principal Arterial

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.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating32 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length359 ft (109.3 m)
Longest span105 ft (32 m)
Deck width138 ft (42.2 m)
Roadway width124 ft (37.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,100 (2024)
Projected traffic38,595 by 2032
Trucks1%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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$47.7 million (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR20 over HWY 316 built?

It was built in 2016, making it 9 years old in 2025.

What condition is SR20 over HWY 316 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 SR20 over HWY 316 carry?

About 53,100 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR20 over HWY 316?

The structure is 359 ft (109.3 m) long with a longest span of 105 ft (32 m) and a deck 138 ft wide.

Who owns SR20 over HWY 316?

It is owned by the State Highway Agency.