US Bridges

Nfa 2230 (sa 7104) over Martin Creek

FairPosted for load

Putnam County, Tennessee · On Jackson&putnam CO Line · Structure no. 71022300005

Built
1973
52 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
221 ft
4 main spans
Daily traffic
92
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2230 (sa 7104) over Martin Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa 2230 (sa 7104) over Martin Creek in Putnam County, Tennessee. It was built in 1973, so it is 52 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 6 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 92 vehicles a day, roughly 2% of them trucks, projected to reach 147 by 2042. The structure is 221 ft (67.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNfa 2230 (sa 7104)
CrossesMartin Creek
LocationOn Jackson&putnam CO Line
RouteCounty Highway 2230
Coordinates36.23681, -85.75765
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating19.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length221 ft (67.4 m)
Longest span56 ft (17.1 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92 (2021)
Projected traffic147 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2230 (sa 7104) over Martin Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Nfa 2230 (sa 7104) over Martin 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 August 2024.

How much traffic does Nfa 2230 (sa 7104) over Martin Creek carry?

About 92 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Nfa 2230 (sa 7104) over Martin Creek?

The structure is 221 ft (67.4 m) long with a longest span of 56 ft (17.1 m) and a deck 30 ft wide.

Who owns Nfa 2230 (sa 7104) over Martin Creek?

It is owned by the County Highway Agency.