US Bridges

I-16 (ebl) over SR 421 (I-516)

Good

Chatham County, Georgia · In Savannah City Limits · Structure no. 000000005100920

Built
1966
59 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
223 ft
4 main spans
Daily traffic
60,800
2024 count
Owner
State
State Highway Agency

About this bridge

I-16 (ebl) over SR 421 (I-516) is a steel continuous stringer/multi-beam or girder carrying I-16 (ebl) over SR 421 (I-516) in Chatham County, Georgia. It was built in 1966, so it is 59 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 60,800 vehicles a day, roughly 7% of them trucks, projected to reach 85,755 by 2031. The structure is 223 ft (68 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-16 (ebl)
CrossesSR 421 (I-516)
LocationIn Savannah City Limits
RouteInterstate 16
CountyChatham County
StateGeorgia
Coordinates32.07068, -81.13531
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 inspectionAugust 2024
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 rating53.9 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length223 ft (68 m)
Longest span80 ft (24.4 m)
Deck width58 ft (17.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60,800 (2024)
Projected traffic85,755 by 2031
Trucks7%
Lanes on structure4
Traffic directionOne-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-16 (ebl) over SR 421 (I-516) built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-16 (ebl) over SR 421 (I-516) 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 August 2024.

How much traffic does I-16 (ebl) over SR 421 (I-516) carry?

About 60,800 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is I-16 (ebl) over SR 421 (I-516)?

The structure is 223 ft (68 m) long with a longest span of 80 ft (24.4 m) and a deck 58 ft wide.

Who owns I-16 (ebl) over SR 421 (I-516)?

It is owned by the State Highway Agency.