County profile · official public datasets

Grundy County, TN

85 public highway bridges tracked in the FHWA National Bridge Inventory: 49.4% rated Good, 49.4% Fair, 1.2% Poor.

85
Public bridges: 49.4%
Good condition: 1.2%
Poor condition

The verdict

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

Grundy County pairs a top-10% lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.

Top 8%
lowest Poor share in state: 1.2%
Poor-condition share: 85
public highway bridges: 1969
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.

Grundy County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Grundy County ranks #8 of 95 Tennessee counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.2%). Grundy County, Tennessee contains 85 public highway bridges. Roughly 49.4% are rated “Good,” 49.4% “Fair,” and 1.2% “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 Grundy County

Good condition

49.4%

42 of 85 rated 7-9

Fair condition

49.4%

42 of 85 rated 5-6

Poor condition

1.2%

1 of 85 rated 4 or below

In-state Poor-share rank

#8 of 95

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

Condition distribution

Share of 85 NBI-tracked bridges by lowest applicable component rating.

Good

49.4% (42)

Fair

49.4% (42)

Poor

1.2% (1)

Grundy County's Poor-condition bridges carry 1,051 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 1.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,051 crossings a day against 884 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 85 of 85 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

50.6% of Grundy County's bridges have passed the 50-year mark

43 of the 85 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 49.4% 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 100% of the county's Poor-condition bridge traffic

FAP 108 over LICK CREEK, built 1950, carries 1,051 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 1-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,051 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

4
1930s

8
1940s

18
1950s

6
1960s

4
1970s

4
1980s

14
1990s

14
2000s

9
2010s

3
2020s

1

What this shows Construction peaked in the 1940s, when 18 of the county's bridges still in the inventory were built, which is 21.2% of those with a recorded year. That cohort is now 75 to 84 years old in the 2024 inventory. Its average build year is 1969, 8 years older than the Tennessee average of 1977.

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

The 5 Tennessee counties nearest Grundy County in number of bridges, with their condition splits. Its 1.2% Poor share is the 1st-lowest of these 6. Its average build year of 1969 against a peer-group mean of 1974 is 5 years older.

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

Bridge inventory size and condition shares for Grundy County and the 5 Tennessee counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Grainger County	88	27.3%	68.2%	4.5%	1970
Trousdale County	88	70.5%	27.3%	2.3%	1979
Grundy County (this page)	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
Meigs County	76	53.9%	42.1%	3.9%	1975

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 Grundy 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 Grundy County, both outside Tennessee so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside TN (85 bridges here).

Monroe County, AR · 85 bridges
Elbert County, CO · 85 bridges
Hardee County, FL · 85 bridges
Early County, GA · 85 bridges

Similar average build year

Nearest mean year-built outside TN (1969 here).

Cook County, IL · avg 1969 · 1,721 bridges
Fresno County, CA · avg 1969 · 916 bridges
Cuyahoga County, OH · avg 1969 · 871 bridges
Ventura County, CA · avg 1969 · 501 bridges

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

All 85 Good 42 Fair 42 Poor 1

All bridges (85)

Sort:

Grundy County Bridge Snapshot

Condition distribution

Grundy County's Poor-condition bridges carry 1,051 vehicle crossings a day

50.6% of Grundy County's bridges have passed the 50-year mark

One structure carries 100% of the county's Poor-condition bridge traffic

How Grundy 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 (85)

NFA A022

NFA A510

NFA A375

FAP 56

NFA A130

NFA A430

FAS 399

FAP 56

FAS 108

FAS 150

FAS 150

FAP 50

NFA A023

FAS 2

FAS 2

NFA A441

FAS 2

NFA 2136 (SA 3108)

NFA A023

NFA A032

NFA A073

NFA A106

NFA A217

NFA A310

NFA A509

NFA 1133 (SA 3103)

I24

I24

I24

I24

NFA 2132 (SA 3101)

FAS 50

FAS 50

NFA 928 (SA 3105)

FAS 2

FAP 50

FAS 50

FAP 56

FAP 56

FAP 108

FAP 108

FAP 108

NFA A267

FAS 50

FAP 108

FAS 108

FAS 108

FAS 2

NFA 2130 (SA 3102)

NFA 2130 (SA 3102)

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