County profile · official public datasets

Trousdale County, TN

88 public highway bridges tracked in the FHWA National Bridge Inventory: 70.5% rated Good, 27.3% Fair, 2.3% Poor.

88
Public bridges: 70.5%
Good condition: 2.3%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Trousdale County posts a top-quartile lowest Poor-condition share among rated counties in the state across rated county bridge inventory.

Top 22%
lowest Poor share in state: 2.3%
Poor-condition share: 88
public highway bridges: 1979
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Trousdale County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Trousdale County ranks #21 of 95 Tennessee counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.3%). Trousdale County, Tennessee contains 88 public highway bridges. Roughly 70.5% are rated “Good,” 27.3% “Fair,” and 2.3% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

Public highway bridges in Trousdale County

Good condition

70.5%

62 of 88 rated 7-9

Fair condition

27.3%

24 of 88 rated 5-6

Poor condition

2.3%

2 of 88 rated 4 or below

In-state Poor-share rank

#21 of 95

Among Tennessee counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 88 NBI-tracked bridges by lowest applicable component rating.

Good

70.5% (62)

Fair

27.3% (24)

Poor

2.3% (2)

Trousdale County's Poor-condition bridges carry 10,070 vehicle crossings a day

That is 6.9% of the county's reported daily bridge traffic on 2.3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 5,035 crossings a day against 895 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 88 of 88 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

28.4% of Trousdale County's bridges have passed the 50-year mark

25 of the 88 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 70.5% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 50.9% of the county's Poor-condition bridge traffic

FAS 141 over OVERFLOW CUMBERLAND RIVE, built 1979, carries 5,129 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 2-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 10,070 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

1
1940s

8
1950s

10
1960s

4
1970s

5
1980s

37
1990s

15
2000s

5
2010s

3

What this shows Construction peaked in the 1980s, when 37 of the county's bridges still in the inventory were built, which is 42% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1979) matches the Tennessee average (1977).

How Trousdale County compares with Tennessee's closest counties by inventory size

The 5 Tennessee counties nearest Trousdale County in number of bridges, with their condition splits. Its 2.3% Poor share is the 3rd-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1974 is 5 years newer.

Showing the 5 closest of 94 Tennessee counties eligible for comparison.

Bridge inventory size and condition shares for Trousdale County and the 5 Tennessee counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Claiborne County	98	35.7%	60.2%	4.1%	1985
Grainger County	88	27.3%	68.2%	4.5%	1970
Trousdale County (this page)	88	70.5%	27.3%	2.3%	1979
Grundy County	85	49.4%	49.4%	1.2%	1969
Bledsoe County	83	50.6%	48.2%	1.2%	1970
Overton County	78	55.1%	41%	3.8%	1977

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Trousdale County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Trousdale County, both outside Tennessee so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside TN (88 bridges here).

Chicot County, AR · 88 bridges
Prairie County, AR · 88 bridges
Grand County, CO · 88 bridges
Spalding County, GA · 88 bridges

Similar average build year

Nearest mean year-built outside TN (1979 here).

Pima County, AZ · avg 1979 · 1,150 bridges
Jefferson County, KY · avg 1979 · 662 bridges
Spartanburg County, SC · avg 1979 · 638 bridges
McPherson County, KS · avg 1979 · 586 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 88 Good 62 Fair 24 Poor 2

All bridges (88)

Sort:

Trousdale County Bridge Snapshot

Condition distribution

Trousdale County's Poor-condition bridges carry 10,070 vehicle crossings a day

28.4% of Trousdale County's bridges have passed the 50-year mark

One structure carries 50.9% of the county's Poor-condition bridge traffic

How Trousdale County compares with Tennessee's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (88)

NFA A021

NFA A025

NFA A026

NFA A028

NFA A035

NFA A036

NFA A040

NFA A040

NFA A041

NFA A044

NFA A044

NFA A051

NFA A054

NFA A054

NFA A054

NFA A054

NFA A057

NFA A062

NFA A062

NFA A062

NFA A109

NFA A118

NFA A119

NFA A125

NFA A125

NFA A135

NFA A135

NFA B109

NFA B130

NFA 1070 (SA 8503)

NFA 1070 (SA 8503)

FAS 260

NFA 1082 (SA 8507)

NFA 1074 (SA 8508)

FAP 10

FAS 141

FAS 141

FAS 141

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