US Bridges

Research Road over Big Slough Trib

PoorClosed to traffic

Mitchell County, Georgia · App 3 MI SW of Camilla · Structure no. 000000020550390

Built
1930
95 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
4 main spans
Daily traffic
10
2024 count
Owner
County
County Highway Agency

About this bridge

Research Road over Big Slough Trib is a wood or timber stringer/multi-beam or girder carrying Research Road over Big Slough Trib in Mitchell County, Georgia. It was built in 1930, so it is 95 years old, older than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 1 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 10 vehicles a day, roughly 1% of them trucks, projected to reach 156 by 2031. The structure is 40 ft (12.2 m) long and 17 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesResearch Road
CrossesBig Slough Trib
LocationApp 3 MI SW of Camilla
RouteCounty Highway 137
StateGeorgia
Coordinates31.18622, -84.23206
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span10 ft (3 m)
Deck width17 ft (5.2 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2024)
Projected traffic156 by 2031
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Research Road over Big Slough Trib built?

It was built in 1930, making it 95 years old in 2025.

What condition is Research Road over Big Slough Trib in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Research Road over Big Slough Trib carry?

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

How long is Research Road over Big Slough Trib?

The structure is 40 ft (12.2 m) long with a longest span of 10 ft (3 m) and a deck 17 ft wide.

Who owns Research Road over Big Slough Trib?

It is owned by the County Highway Agency.