US Bridges

SR 400 (nbl) over Nancy Creek

Good

Fulton County, Georgia · In N Atlanta · Structure no. 000000012107470

Built
1992
33 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
422 ft
5 main spans
Daily traffic
117,000
2024 count
Owner
State
State Highway Agency

About this bridge

SR 400 (nbl) over Nancy Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 400 (nbl) over Nancy Creek in Fulton County, Georgia. It was built in 1992, so it is 33 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 117,000 vehicles a day, roughly 1% of them trucks, projected to reach 170,670 by 2032. The structure is 422 ft (128.6 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 400 (nbl)
CrossesNancy Creek
LocationIn N Atlanta
RouteState Highway 400
StateGeorgia
Coordinates33.88161, -84.36469
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 rating67.9 US tons
Inventory rating38.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length422 ft (128.6 m)
Longest span104 ft (31.7 m)
Deck width65 ft (19.9 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117,000 (2024)
Projected traffic170,670 by 2032
Trucks1%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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$3.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 400 (nbl) over Nancy Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is SR 400 (nbl) over Nancy Creek 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 May 2023.

How much traffic does SR 400 (nbl) over Nancy Creek carry?

About 117,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 400 (nbl) over Nancy Creek?

The structure is 422 ft (128.6 m) long with a longest span of 104 ft (31.7 m) and a deck 65 ft wide.

Who owns SR 400 (nbl) over Nancy Creek?

It is owned by the State Highway Agency.