US Bridges

Mount Wilkinson Pa over I-285

Good

Cobb County, Georgia · 3.8 Mi. SE of Smyrna · Structure no. 000000006751840

Built
1998
27 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
412 ft
4 main spans
Daily traffic
2,047
2024 count
Owner
State
State Highway Agency

About this bridge

Mount Wilkinson Pa over I-285 is a prestressed concrete stringer/multi-beam or girder carrying Mount Wilkinson Pa over I-285 in Cobb County, Georgia. It was built in 1998, so it is 27 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 2,047 vehicles a day, roughly 1% of them trucks, projected to reach 2,895 by 2032. The structure is 412 ft (125.6 m) long and 86 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMount Wilkinson Pa
CrossesI-285
Location3.8 Mi. SE of Smyrna
RouteCounty Highway 7069
StateGeorgia
Coordinates33.87263, -84.47615
Functional classUrban Local

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 inspectionSeptember 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 rating50.9 US tons
Inventory rating35.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length412 ft (125.6 m)
Longest span120 ft (36.6 m)
Deck width86 ft (26.3 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,047 (2024)
Projected traffic2,895 by 2032
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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$3.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mount Wilkinson Pa over I-285 built?

It was built in 1998, making it 27 years old in 2025.

What condition is Mount Wilkinson Pa over I-285 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 September 2023.

How much traffic does Mount Wilkinson Pa over I-285 carry?

About 2,047 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Mount Wilkinson Pa over I-285?

The structure is 412 ft (125.6 m) long with a longest span of 120 ft (36.6 m) and a deck 86 ft wide.

Who owns Mount Wilkinson Pa over I-285?

It is owned by the State Highway Agency.