US Bridges

Nfa 950 (sa 4122) over Dog Creek

Fair

Hickman County, Tennessee · .25 M East Primm Springs · Structure no. 41F04930001

Built
1972
53 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
60 ft
2 main spans
Daily traffic
336
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 950 (sa 4122) over Dog Creek is a concrete continuous culvert carrying Nfa 950 (sa 4122) over Dog Creek in Hickman County, Tennessee. It was built in 1972, so it is 53 years old, older 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.

It carries about 336 vehicles a day, roughly 3% of them trucks, projected to reach 469 by 2041. The structure is 60 ft (18.3 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesNfa 950 (sa 4122)
CrossesDog Creek
Location.25 M East Primm Springs
RouteCounty Highway 950
CountyHickman County
StateTennessee
Coordinates35.8187, -87.2542
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length60 ft (18.3 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic336 (2021)
Projected traffic469 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$400,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 950 (sa 4122) over Dog Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Nfa 950 (sa 4122) over Dog Creek 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 September 2023.

How much traffic does Nfa 950 (sa 4122) over Dog Creek carry?

About 336 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 950 (sa 4122) over Dog Creek?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns Nfa 950 (sa 4122) over Dog Creek?

It is owned by the County Highway Agency.