US Bridges

Nfa 1691 (sa 3906) over Harmon Creek

Fair

Henderson County, Tennessee · 2 MI N of SR20 · Structure no. 39016910003

Built
1987
38 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
36 ft
2 main spans
Daily traffic
622
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1691 (sa 3906) over Harmon Creek is a concrete continuous culvert carrying Nfa 1691 (sa 3906) over Harmon Creek in Henderson County, Tennessee. It was built in 1987, so it is 38 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 6 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 622 vehicles a day, roughly 1% of them trucks, projected to reach 1,024 by 2038. The structure is 36 ft (11 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa 1691 (sa 3906)
CrossesHarmon Creek
Location2 MI N of SR20
RouteCounty Highway 1691
CountyHenderson County
StateTennessee
Coordinates35.66233, -88.34608
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating99.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length36 ft (11 m)
Longest span16 ft (5 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic622 (2021)
Projected traffic1,024 by 2038
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1691 (sa 3906) over Harmon Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Nfa 1691 (sa 3906) over Harmon 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 June 2024.

How much traffic does Nfa 1691 (sa 3906) over Harmon Creek carry?

About 622 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa 1691 (sa 3906) over Harmon Creek?

The structure is 36 ft (11 m) long with a longest span of 16 ft (5 m) and a deck 28 ft wide.

Who owns Nfa 1691 (sa 3906) over Harmon Creek?

It is owned by the County Highway Agency.