County profile · official public datasets

Trigg County, KY

109 public highway bridges tracked in the FHWA National Bridge Inventory: 39.4% rated Good, 51.4% Fair, 9.2% Poor.

109
Public bridges: 39.4%
Good condition: 9.2%
Poor condition

The verdict

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

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

89th
of 120 on Poor share: 9.2%
Poor-condition share: 109
public highway bridges: 1980
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.

Trigg County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Trigg County ranks #89 of 120 Kentucky counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.2%). Trigg County, Kentucky contains 109 public highway bridges. Roughly 39.4% are rated “Good,” 51.4% “Fair,” and 9.2% “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

109

Public highway bridges in Trigg County

Good condition

39.4%

43 of 109 rated 7-9

Fair condition

51.4%

56 of 109 rated 5-6

Poor condition

9.2%

10 of 109 rated 4 or below

In-state Poor-share rank

#89 of 120

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

Condition distribution

Share of 109 NBI-tracked bridges by lowest applicable component rating.

Good

39.4% (43)

Fair

51.4% (56)

Poor

9.2% (10)

Trigg County's Poor-condition bridges carry 3,733 vehicle crossings a day

That is 2.3% of the county's reported daily bridge traffic on 9.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 373 crossings a day against 2,190 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 109 of 109 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

42.2% of Trigg County's bridges have passed the 50-year mark

46 of the 109 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 39.4% 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 37.6% of the county's Poor-condition bridge traffic

KY-274 over DRYERS CREEK, built 1963, carries 1,405 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 10-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 3,733 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1930s

11
1950s

10
1960s

15
1970s

18
1980s

15
1990s

10
2000s

14
2010s

14
2020s

2

What this shows Construction peaked in the 1970s, when 18 of the county's bridges still in the inventory were built, which is 16.5% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1980) matches the Kentucky average (1978).

How Trigg County compares with Kentucky's closest counties by inventory size

The 5 Kentucky counties nearest Trigg County in number of bridges, with their condition splits. Its 9.2% Poor share is the 5th-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1980 is in line with the group.

Showing the 5 closest of 119 Kentucky counties eligible for comparison.

Bridge inventory size and condition shares for Trigg County and the 5 Kentucky counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Bourbon County	112	18.8%	78.6%	2.7%	1974
Leslie County	112	28.6%	58%	13.4%	1980
Powell County	110	39.1%	59.1%	1.8%	1975
Trigg County (this page)	109	39.4%	51.4%	9.2%	1980
Magoffin County	107	43.9%	53.3%	2.8%	1986
Warren County	106	18.9%	77.4%	3.8%	1984

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

Similar inventory size

Nearest county inventories outside KY (109 bridges here).

Mariposa County, CA · 109 bridges
Boone County, IL · 109 bridges
Gove County, KS · 109 bridges
Hodgeman County, KS · 109 bridges

Similar average build year

Nearest mean year-built outside KY (1980 here).

Tulsa County, OK · avg 1980 · 1,135 bridges
Miami-Dade County, FL · avg 1980 · 1,057 bridges
Pulaski County, AR · avg 1980 · 721 bridges
McLennan County, TX · avg 1980 · 714 bridges

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

All 109 Good 43 Fair 56 Poor 10

All bridges (109)

Sort:

Trigg County Bridge Snapshot

Condition distribution

Trigg County's Poor-condition bridges carry 3,733 vehicle crossings a day

42.2% of Trigg County's bridges have passed the 50-year mark

One structure carries 37.6% of the county's Poor-condition bridge traffic

How Trigg County compares with Kentucky'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 (109)

LBL ROAD 134

LBL ROAD 134

LBL ROAD 165

LBL ROAD 165

LBL ROAD 165

Stone Road

LBL ROAD 174

KY-1175

PPOOL RD

IC-8036N

PLEASANT HILL CHUR

KY-164

KY-778

KY-124

KY-276

KY-274

KY-525

KY-124

KY-6049

KY-139

KY-126

KY-164

SAM DOWNS RD.

KY-126

I-24-10 NC

I-24

KY-139

KY-139

KY-164

KY-276

CANTON BLUE SPG RD

KY-128

US-68X

KY-124

I-24-10 NC

KY-164

KY-1253

KY-274

KY-1489

US 68

KY-126

KY-272

KY-164

KY-276

KY-276

KY-1062

KY-624

STATE PARK RD

KY-124

EAST LAKE RD

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