US Bridges

I-520 over SR 121 (us 25)

Good

Richmond County, Georgia · 7.5 MI N of Hephzibah · Structure no. 000000024500640

Built
1981
44 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
264 ft
2 main spans
Daily traffic
46,500
2024 count
Owner
State
State Highway Agency

About this bridge

I-520 over SR 121 (us 25) is a prestressed concrete continuous box beam or girders - single or spread carrying I-520 over SR 121 (us 25) in Richmond County, Georgia. It was built in 1981, so it is 44 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 46,500 vehicles a day, roughly 1% of them trucks, projected to reach 54,630 by 2032. The structure is 264 ft (80.5 m) long and 127 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-520
CrossesSR 121 (us 25)
Location7.5 MI N of Hephzibah
RouteInterstate 520
CountyRichmond County
StateGeorgia
Coordinates33.40648, -82.02673
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2023
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 rating58 US tons
Inventory rating34.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length264 ft (80.5 m)
Longest span140 ft (42.7 m)
Deck width127 ft (38.8 m)
Roadway width121 ft (37 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,500 (2024)
Projected traffic54,630 by 2032
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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$2.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-520 over SR 121 (us 25) built?

It was built in 1981, making it 44 years old in 2025.

What condition is I-520 over SR 121 (us 25) 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 October 2023.

How much traffic does I-520 over SR 121 (us 25) carry?

About 46,500 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-520 over SR 121 (us 25)?

The structure is 264 ft (80.5 m) long with a longest span of 140 ft (42.7 m) and a deck 127 ft wide.

Who owns I-520 over SR 121 (us 25)?

It is owned by the State Highway Agency.