County profile · official public datasets

Warren County, TN

160 public highway bridges tracked in the FHWA National Bridge Inventory: 48.1% rated Good, 48.1% Fair, 3.8% Poor.

160
Public bridges: 48.1%
Good condition: 3.8%
Poor condition

The verdict

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

Warren County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

48th
of 95 on Poor share: 3.8%
Poor-condition share: 160
public highway bridges: 1976
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.

Warren County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Warren County ranks #48 of 95 Tennessee counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.8%). Warren County, Tennessee contains 160 public highway bridges. Roughly 48.1% are rated “Good,” 48.1% “Fair,” and 3.8% “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

160

Public highway bridges in Warren County

Good condition

48.1%

77 of 160 rated 7-9

Fair condition

48.1%

77 of 160 rated 5-6

Poor condition

3.8%

6 of 160 rated 4 or below

In-state Poor-share rank

#48 of 95

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

Condition distribution

Share of 160 NBI-tracked bridges by lowest applicable component rating.

Good

48.1% (77)

Fair

48.1% (77)

Poor

3.8% (6)

Warren County's Poor-condition bridges carry 5,084 vehicle crossings a day

That is 1.3% of the county's reported daily bridge traffic on 3.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 847 crossings a day against 1,851 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 160 of 160 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

46.9% of Warren County's bridges have passed the 50-year mark

75 of the 160 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 48.1% 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 48.4% of the county's Poor-condition bridge traffic

NFA A855 over MUD CREEK, built 1924, carries 2,460 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 6-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 5,084 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

3
1930s

8
1940s

8
1950s

19
1960s

29
1970s

18
1980s

32
1990s

21
2000s

6
2010s

15
2020s

1

What this shows Construction peaked in the 1980s, when 32 of the county's bridges still in the inventory were built, which is 20% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1976) matches the Tennessee average (1977).

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

The 5 Tennessee counties nearest Warren County in number of bridges, with their condition splits. Its 3.8% Poor share is the 3rd-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1979 is in line with the group.

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

Bridge inventory size and condition shares for Warren County and the 5 Tennessee counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Crockett County	167	44.9%	54.5%	0.6%	1985
Unicoi County	161	46%	49.1%	5%	1984
Warren County (this page)	160	48.1%	48.1%	3.8%	1976
Cannon County	159	45.9%	43.4%	10.7%	1974
Roane County	159	48.4%	49.7%	1.9%	1972
Franklin County	157	42.7%	53.5%	3.8%	1980

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

Similar inventory size

Nearest county inventories outside TN (160 bridges here).

Clay County, KY · 160 bridges
Kittson County, MN · 160 bridges
Rio Arriba County, NM · 160 bridges
Delaware County, OK · 160 bridges

Similar average build year

Nearest mean year-built outside TN (1976 here).

Marion County, IN · avg 1976 · 958 bridges
Mohave County, AZ · avg 1976 · 641 bridges
Comanche County, OK · avg 1976 · 593 bridges
Prince George's County, MD · avg 1976 · 576 bridges

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

All 160 Good 77 Fair 77 Poor 6

Good-condition bridges (77)

Sort:

Warren County Bridge Snapshot

Condition distribution

Warren County's Poor-condition bridges carry 5,084 vehicle crossings a day

46.9% of Warren County's bridges have passed the 50-year mark

One structure carries 48.4% of the county's Poor-condition bridge traffic

How Warren 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

Good-condition bridges (77)

NFA 1112

NFA 1112 (SA 8908)

NFA 1112 (SA 8908)

NFA A133

NFA A175

FAS 287

FAS 287

NFA 1123 (SA 8911)

NFA 928 (SA 8921)

NFA 928 (SA 8921)

FAS 288

NFA 0A611

FAP 1

FAP 1

FAP 1

FAP 1

FAP 1

FAP 1

FAP 1

FAP 1

FAP 56

FAP 56

FAP 56

FAP 56

FAS 108

FAS 108

NFA A419

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