US Bridges

Mabry Road over Noahs Spring Branch

Fair

Montgomery County, Tennessee · 0.25 MI E Boiling Spring · Structure no. DAPFORCAK0BR053

Built
2008
17 years old
Condition
Fair
inspected November 2024
Type
Culvert
Steel
Length
31 ft
3 main spans
Daily traffic
300
2022 count
Owner
Federal
Army

About this bridge

Mabry Road over Noahs Spring Branch is a steel culvert carrying Mabry Road over Noahs Spring Branch in Montgomery County, Tennessee. It was built in 2008, so it is 17 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 300 vehicles a day, roughly 40% of them trucks, projected to reach 300 by 2046. The structure is 31 ft (9.5 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMabry Road
CrossesNoahs Spring Branch
Location0.25 MI E Boiling Spring
CountyMontgomery County
StateTennessee
Coordinates36.62237, -87.51376
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span9 ft (2.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)
Projected traffic300 by 2046
Trucks40%
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

OwnerArmy
Maintained byArmy
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mabry Road over Noahs Spring Branch built?

It was built in 2008, making it 17 years old in 2025.

What condition is Mabry Road over Noahs Spring 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 November 2024.

How much traffic does Mabry Road over Noahs Spring Branch carry?

About 300 vehicles per day (2022 count), of which roughly 40% are trucks.

How long is Mabry Road over Noahs Spring Branch?

The structure is 31 ft (9.5 m) long with a longest span of 9 ft (2.6 m).

Who owns Mabry Road over Noahs Spring Branch?

It is owned by the Army.