US Bridges

Nfa A434 over Mcclanahan Branch

Good

Maury County, Tennessee · 6.5 M. Nw. Mt. Pleasant. · Structure no. 600A4340001

Built
1993
32 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
57 ft
3 main spans
Daily traffic
250
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A434 over Mcclanahan Branch is a concrete continuous culvert carrying Nfa A434 over Mcclanahan Branch in Maury County, Tennessee. It was built in 1993, so it is 32 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 250 vehicles a day, roughly 2% of them trucks, projected to reach 400 by 2040. The structure is 57 ft (17.4 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa A434
CrossesMcclanahan Branch
Location6.5 M. Nw. Mt. Pleasant.
RouteCounty Highway 434
CountyMaury County
StateTennessee
Coordinates35.5981, -87.29185
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
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 rating49.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic400 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$92,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A434 over Mcclanahan Branch built?

It was built in 1993, making it 32 years old in 2025.

What condition is Nfa A434 over Mcclanahan Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Nfa A434 over Mcclanahan Branch carry?

About 250 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A434 over Mcclanahan Branch?

The structure is 57 ft (17.4 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns Nfa A434 over Mcclanahan Branch?

It is owned by the County Highway Agency.