US Bridges

FAS 21 over Mill Creek

Fair

Obion County, Tennessee · .5 Mi.W.Of Troy · Structure no. 66SR0210005

Built
1998
27 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
56 ft
3 main spans
Daily traffic
1,806
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 21 over Mill Creek is a concrete continuous culvert carrying FAS 21 over Mill Creek in Obion County, Tennessee. It was built in 1998, so it is 27 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 1,806 vehicles a day, roughly 5% of them trucks, projected to reach 2,736 by 2041. The structure is 56 ft (17.1 m) long and 47 ft wide. If it were closed, the detour would be 73.9 mi (119 km).

Location

Open in Google Maps
CarriesFAS 21
CrossesMill Creek
Location.5 Mi.W.Of Troy
RouteState Highway 21
CountyObion County
StateTennessee
Coordinates36.33642, -89.20644
Functional classRural Major 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 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span18 ft (5.5 m)
Deck width47 ft (14.2 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,806 (2021)
Projected traffic2,736 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed73.9 mi (119 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 21 over Mill Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is FAS 21 over Mill 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 FAS 21 over Mill Creek carry?

About 1,806 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAS 21 over Mill Creek?

The structure is 56 ft (17.1 m) long with a longest span of 18 ft (5.5 m) and a deck 47 ft wide.

Who owns FAS 21 over Mill Creek?

It is owned by the State Highway Agency.