US Bridges

Killian Hill Road over CSX Railroad

Fair

Gwinnett County, Georgia · In Lilburn · Structure no. 000000013500900

Built
1975
50 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
129 ft
3 main spans
Daily traffic
26,900
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Killian Hill Road over CSX Railroad is a prestressed concrete stringer/multi-beam or girder carrying Killian Hill Road over CSX Railroad in Gwinnett County, Georgia. It was built in 1975, so it is 50 years old, older than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 26,900 vehicles a day, roughly 1% of them trucks, projected to reach 27,510 by 2032. The structure is 129 ft (39.3 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesKillian Hill Road
CrossesCSX Railroad
LocationIn Lilburn
RouteCity Street 9317
CountyGwinnett County
StateGeorgia
Coordinates33.89106, -84.1273
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating35.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span43 ft (13.1 m)
Deck width47 ft (14.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,900 (2024)
Projected traffic27,510 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$756,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Killian Hill Road over CSX Railroad built?

It was built in 1975, making it 50 years old in 2025.

What condition is Killian Hill Road over CSX Railroad in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does Killian Hill Road over CSX Railroad carry?

About 26,900 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Killian Hill Road over CSX Railroad?

The structure is 129 ft (39.3 m) long with a longest span of 43 ft (13.1 m) and a deck 47 ft wide.

Who owns Killian Hill Road over CSX Railroad?

It is owned by the City or Municipal Highway Agency.