US Bridges

Rock Bridge RD over Camp Creek

Good

Gwinnett County, Georgia · In Lilburn · Structure no. 000000013550700

Built
1991
34 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
190 ft
3 main spans
Daily traffic
18,106
2024 count
Owner
County
County Highway Agency

About this bridge

Rock Bridge RD over Camp Creek is a prestressed concrete stringer/multi-beam or girder carrying Rock Bridge RD over Camp Creek in Gwinnett County, Georgia. It was built in 1991, so it is 34 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 18,106 vehicles a day, roughly 1% of them trucks, projected to reach 27,480 by 2032. The structure is 190 ft (57.9 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRock Bridge RD
CrossesCamp Creek
LocationIn Lilburn
RouteCounty Highway 494
StateGeorgia
Coordinates33.87959, -84.15588
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 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 rating50.9 US tons
Inventory rating35.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length190 ft (57.9 m)
Longest span70 ft (21.3 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,106 (2024)
Projected traffic27,480 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$1.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Bridge RD over Camp Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Rock Bridge RD over Camp 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 September 2023.

How much traffic does Rock Bridge RD over Camp Creek carry?

About 18,106 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Rock Bridge RD over Camp Creek?

The structure is 190 ft (57.9 m) long with a longest span of 70 ft (21.3 m) and a deck 55 ft wide.

Who owns Rock Bridge RD over Camp Creek?

It is owned by the County Highway Agency.