US Bridges

Thompson Mill RD over Big Flat Creek

Good

Walton County, Georgia · 3.3 MI NE of Walnut Grove · Structure no. 000000029750830

Built
2001
24 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
1,594
2024 count
Owner
County
County Highway Agency

About this bridge

Thompson Mill RD over Big Flat Creek is a steel stringer/multi-beam or girder carrying Thompson Mill RD over Big Flat Creek in Walton County, Georgia. It was built in 2001, so it is 24 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 1,594 vehicles a day, roughly 1% of them trucks, projected to reach 735 by 2032. The structure is 42 ft (12.8 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesThompson Mill RD
CrossesBig Flat Creek
Location3.3 MI NE of Walnut Grove
RouteCounty Highway 78
StateGeorgia
Coordinates33.78336, -83.82136
Functional classRural 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span42 ft (12.8 m)
Deck width18 ft (5.4 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,594 (2024)
Projected traffic735 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$246,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Thompson Mill RD over Big Flat Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is Thompson Mill RD over Big Flat 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 July 2023.

How much traffic does Thompson Mill RD over Big Flat Creek carry?

About 1,594 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Thompson Mill RD over Big Flat Creek?

The structure is 42 ft (12.8 m) long with a longest span of 42 ft (12.8 m) and a deck 18 ft wide.

Who owns Thompson Mill RD over Big Flat Creek?

It is owned by the County Highway Agency.