US Bridges

SR 400 (nbl) over M-9323 Sidney Marcus Bld

Good

Fulton County, Georgia · North Atlanta · Structure no. 000000012107360

Built
1992
33 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
243 ft
4 main spans
Daily traffic
81,500
2024 count
Owner
State
State Highway Agency

About this bridge

SR 400 (nbl) over M-9323 Sidney Marcus Bld is a prestressed concrete stringer/multi-beam or girder carrying SR 400 (nbl) over M-9323 Sidney Marcus Bld 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 81,500 vehicles a day, roughly 1% of them trucks, projected to reach 119,025 by 2032. The structure is 243 ft (74.1 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 400 (nbl)
CrossesM-9323 Sidney Marcus Bld
LocationNorth Atlanta
RouteState Highway 400
CountyFulton County
StateGeorgia
Coordinates33.82507, -84.35961
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.
Last inspectionApril 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 rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length243 ft (74.1 m)
Longest span68 ft (20.7 m)
Deck width66 ft (20 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic81,500 (2024)
Projected traffic119,025 by 2032
Trucks1%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 400 (nbl) over M-9323 Sidney Marcus Bld built?

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

What condition is SR 400 (nbl) over M-9323 Sidney Marcus Bld 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 April 2023.

How much traffic does SR 400 (nbl) over M-9323 Sidney Marcus Bld carry?

About 81,500 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 400 (nbl) over M-9323 Sidney Marcus Bld?

The structure is 243 ft (74.1 m) long with a longest span of 68 ft (20.7 m) and a deck 66 ft wide.

Who owns SR 400 (nbl) over M-9323 Sidney Marcus Bld?

It is owned by the State Highway Agency.