US Bridges

Nfa 2122 over Overflow (gwma)

FairPosted for load

Obion County, Tennessee · In Waterfowl Mngmt Area · Structure no. 660A8100001

Built
1989
36 years old
Condition
Fair
inspected March 2023
Type
Channel Beam
Concrete
Length
68 ft
3 main spans
Daily traffic
242
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2122 over Overflow (gwma) is a concrete channel beam carrying Nfa 2122 over Overflow (gwma) in Obion County, Tennessee. It was built in 1989, so it is 36 years old, younger than the Tennessee average of 47.4 years.

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

It carries about 242 vehicles a day, roughly 3% of them trucks, projected to reach 363 by 2041. The structure is 68 ft (20.7 m) long and 22 ft wide. If it were closed, the detour would be 90.1 mi (145 km).

Location

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CarriesNfa 2122
CrossesOverflow (gwma)
LocationIn Waterfowl Mngmt Area
RouteCounty Highway 2122
CountyObion County
StateTennessee
Coordinates36.26058, -89.11422
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length68 ft (20.7 m)
Longest span17 ft (5.2 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic242 (2021)
Projected traffic363 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed90.1 mi (145 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$799,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2122 over Overflow (gwma) built?

It was built in 1989, making it 36 years old in 2025.

What condition is Nfa 2122 over Overflow (gwma) 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 March 2023.

How much traffic does Nfa 2122 over Overflow (gwma) carry?

About 242 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2122 over Overflow (gwma)?

The structure is 68 ft (20.7 m) long with a longest span of 17 ft (5.2 m) and a deck 22 ft wide.

Who owns Nfa 2122 over Overflow (gwma)?

It is owned by the County Highway Agency.