County profile · official public datasets

Greene County, TN

306 public highway bridges tracked in the FHWA National Bridge Inventory: 30.4% rated Good, 67% Fair, 2.6% Poor.

306
Public bridges: 30.4%
Good condition: 2.6%
Poor condition

The verdict

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

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

Top 27%
lowest Poor share in state: 2.6%
Poor-condition share: 306
public highway bridges: 1974
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.

Greene County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Greene County ranks #26 of 95 Tennessee counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.6%). Greene County, Tennessee contains 306 public highway bridges. Roughly 30.4% are rated “Good,” 67% “Fair,” and 2.6% “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

306

Public highway bridges in Greene County

Good condition

30.4%

93 of 306 rated 7-9

Fair condition

67%

205 of 306 rated 5-6

Poor condition

2.6%

8 of 306 rated 4 or below

In-state Poor-share rank

#26 of 95

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

Condition distribution

Share of 306 NBI-tracked bridges by lowest applicable component rating.

Good

30.4% (93)

Fair

67% (205)

Poor

2.6% (8)

Greene County's Poor-condition bridges carry 109,253 vehicle crossings a day

That is 5.5% of the county's reported daily bridge traffic on 2.6% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 13,657 crossings a day against 3,957 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 306 of 306 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

47.4% of Greene County's bridges have passed the 50-year mark

145 of the 306 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 30.4% 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 40.6% of the county's Poor-condition bridge traffic

I81 over SR 34, built 1968, carries 44,318 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 8-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 109,253 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

17
1930s

21
1940s

11
1950s

16
1960s

27
1970s

56
1980s

82
1990s

35
2000s

33
2010s

6
2020s

1

What this shows Construction peaked in the 1980s, when 82 of the county's bridges still in the inventory were built, which is 26.8% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1974) matches the Tennessee average (1977).

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

The 5 Tennessee counties nearest Greene County in number of bridges, with their condition splits. Its 2.6% Poor share is the 3rd-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1974 is in line with the group.

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

Bridge inventory size and condition shares for Greene County and the 5 Tennessee counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Hickman County	331	38.7%	56.2%	5.1%	1979
Giles County	321	56.1%	41.7%	2.2%	1968
Greene County (this page)	306	30.4%	67%	2.6%	1974
Lincoln County	304	52.6%	44.4%	3%	1974
Bedford County	294	58.5%	38.8%	2.7%	1973
Washington County	284	48.6%	48.9%	2.5%	1976

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

Similar inventory size

Nearest county inventories outside TN (306 bridges here).

La Paz County, AZ · 306 bridges
Adair County, IA · 306 bridges
Greene County, PA · 306 bridges
Grant County, WA · 306 bridges

Similar average build year

Nearest mean year-built outside TN (1974 here).

Summit County, OH · avg 1974 · 563 bridges
Onondaga County, NY · avg 1974 · 472 bridges
Orange County, NY · avg 1974 · 472 bridges
Pierce County, WA · avg 1974 · 472 bridges

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

All 306 Good 93 Fair 205 Poor 8

Good-condition bridges (93)

Sort:

Greene County Bridge Snapshot

Condition distribution

Greene County's Poor-condition bridges carry 109,253 vehicle crossings a day

47.4% of Greene County's bridges have passed the 50-year mark

One structure carries 40.6% of the county's Poor-condition bridge traffic

How Greene 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 (93)

NFA A622

NFA A633

NFA A653

NFA A759

NFA B451

NFA A823

NFA A906

NFA A930

NFA A934

NFA A973

NFA B010

NFA B061

NFA B095

NFA C106

FAS 350

NFA 1352 (SA 3014)

I81

I81

I81

I81

FAS 340

NFA 1350 (SA 3016)

NFA 1236 (SA 3026)

NFA 1342 (SA 3002)

FAP 34

FAP 34

FAP 34

FAP 70

FAP 70

FAP 93

FAU 5389

FAS 107

FAP 93

FAS 351

NFA 2582 (SA 3009)

I81

NFA A283

NFSR 41

NFSR 41

I81

I81

NFA 2590

NFA A170

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