US Bridges

Discovery Blvd. over Nickajack Creek

Good

Cobb County, Georgia · 6.8 Miles South of Smyrna · Structure no. 000000006752460

Built
1995
30 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
466 ft
7 main spans
Daily traffic
10,700
2024 count
Owner
County
County Highway Agency

About this bridge

Discovery Blvd. over Nickajack Creek is a prestressed concrete stringer/multi-beam or girder carrying Discovery Blvd. over Nickajack Creek in Cobb County, Georgia. It was built in 1995, so it is 30 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 10,700 vehicles a day, roughly 1% of them trucks, projected to reach 10 by 2032. The structure is 466 ft (142 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesDiscovery Blvd.
CrossesNickajack Creek
Location6.8 Miles South of Smyrna
RouteCounty Highway 9025
StateGeorgia
Coordinates33.79022, -84.52186
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length466 ft (142 m)
Longest span80 ft (24.4 m)
Deck width43 ft (13.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,700 (2024)
Projected traffic10 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$2.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Discovery Blvd. over Nickajack Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Discovery Blvd. over Nickajack 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 Discovery Blvd. over Nickajack Creek carry?

About 10,700 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Discovery Blvd. over Nickajack Creek?

The structure is 466 ft (142 m) long with a longest span of 80 ft (24.4 m) and a deck 43 ft wide.

Who owns Discovery Blvd. over Nickajack Creek?

It is owned by the County Highway Agency.