US Bridges

SR 85 (sbl) over I-75 (sbl Ramp)

Good

Clayton County, Georgia · 0.2 MI S of JCT I-75 · Structure no. 000000006300160

Built
1977
48 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
272 ft
3 main spans
Daily traffic
12,500
2024 count
Owner
State
State Highway Agency

About this bridge

SR 85 (sbl) over I-75 (sbl Ramp) is a prestressed concrete continuous box beam or girders - single or spread carrying SR 85 (sbl) over I-75 (sbl Ramp) in Clayton County, Georgia. It was built in 1977, so it is 48 years old, older 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 12,500 vehicles a day, roughly 1% of them trucks, projected to reach 23,925 by 2032. The structure is 272 ft (82.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 85 (sbl)
CrossesI-75 (sbl Ramp)
Location0.2 MI S of JCT I-75
RouteState Highway 85
CountyClayton County
StateGeorgia
Coordinates33.62639, -84.40121
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.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length272 ft (82.9 m)
Longest span158 ft (48.2 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2024)
Projected traffic23,925 by 2032
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 85 (sbl) over I-75 (sbl Ramp) built?

It was built in 1977, making it 48 years old in 2025.

What condition is SR 85 (sbl) over I-75 (sbl Ramp) 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 June 2023.

How much traffic does SR 85 (sbl) over I-75 (sbl Ramp) carry?

About 12,500 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 85 (sbl) over I-75 (sbl Ramp)?

The structure is 272 ft (82.9 m) long with a longest span of 158 ft (48.2 m) and a deck 32 ft wide.

Who owns SR 85 (sbl) over I-75 (sbl Ramp)?

It is owned by the State Highway Agency.