US Bridges

FAP 1 over Four Mile Branch

Fair

Dickson County, Tennessee · .4 Mi.W.Of Montgomery Bel · Structure no. 22SR0010011

Built
1940
85 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
57 ft
2 main spans
Daily traffic
7,241
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 1 over Four Mile Branch is a concrete tee beam carrying FAP 1 over Four Mile Branch in Dickson County, Tennessee. It was built in 1940, so it is 85 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.

It carries about 7,241 vehicles a day, roughly 5% of them trucks, projected to reach 11,040 by 2040. The structure is 57 ft (17.4 m) long and 43 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesFAP 1
CrossesFour Mile Branch
Location.4 Mi.W.Of Montgomery Bel
RouteU.S. Route 70
CountyDickson County
StateTennessee
Coordinates36.10242, -87.28854
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionApril 2024
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 rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span27 ft (8.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,241 (2021)
Projected traffic11,040 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$574,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 1 over Four Mile Branch built?

It was built in 1940, making it 85 years old in 2025.

What condition is FAP 1 over Four Mile Branch 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 April 2024.

How much traffic does FAP 1 over Four Mile Branch carry?

About 7,241 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAP 1 over Four Mile Branch?

The structure is 57 ft (17.4 m) long with a longest span of 27 ft (8.2 m) and a deck 43 ft wide.

Who owns FAP 1 over Four Mile Branch?

It is owned by the State Highway Agency.