US Bridges

Nfa 1437 (sa 6604) over Zion Creek

Fair

Obion County, Tennessee · 3.5 MI E of Lake Co. · Structure no. 66S80050001

Built
1992
33 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
475
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1437 (sa 6604) over Zion Creek is a prestressed concrete box beam or girders - single or spread carrying Nfa 1437 (sa 6604) over Zion Creek in Obion County, Tennessee. It was built in 1992, so it is 33 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 475 vehicles a day, roughly 3% of them trucks, projected to reach 960 by 2041. The structure is 92 ft (28 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1437 (sa 6604)
CrossesZion Creek
Location3.5 MI E of Lake Co.
RouteCounty Highway 1437
CountyObion County
StateTennessee
Coordinates36.22858, -89.3318
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length92 ft (28 m)
Longest span92 ft (28 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2021)
Projected traffic960 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 1437 (sa 6604) over Zion Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Nfa 1437 (sa 6604) over Zion 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 March 2023.

How much traffic does Nfa 1437 (sa 6604) over Zion Creek carry?

About 475 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1437 (sa 6604) over Zion Creek?

The structure is 92 ft (28 m) long with a longest span of 92 ft (28 m) and a deck 30 ft wide.

Who owns Nfa 1437 (sa 6604) over Zion Creek?

It is owned by the County Highway Agency.