County profile · official public datasets

Grant County, KY

79 public highway bridges tracked in the FHWA National Bridge Inventory: 55.7% rated Good, 38% Fair, 6.3% Poor.

79
Public bridges: 55.7%
Good condition: 6.3%
Poor condition

The verdict

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

Grant County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 42%
lowest Poor share in state: 6.3%
Poor-condition share: 79
public highway bridges: 1988
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.

Grant County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Grant County ranks #50 of 120 Kentucky counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). Grant County, Kentucky contains 79 public highway bridges. Roughly 55.7% are rated “Good,” 38% “Fair,” and 6.3% “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 Grant County

Good condition

55.7%

44 of 79 rated 7-9

Fair condition

38%

30 of 79 rated 5-6

Poor condition

6.3%

5 of 79 rated 4 or below

In-state Poor-share rank

#50 of 120

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

Condition distribution

Share of 79 NBI-tracked bridges by lowest applicable component rating.

Good

55.7% (44)

Fair

38% (30)

Poor

6.3% (5)

Grant County's Poor-condition bridges carry 1,565 vehicle crossings a day

That is 0.8% of the county's reported daily bridge traffic on 6.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 313 crossings a day against 2,942 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 76 of 79 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

26.6% of Grant County's bridges have passed the 50-year mark

21 of the 79 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 55.7% 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 72.5% of the county's Poor-condition bridge traffic

KY-491 over BULLOCK CREEK, built 1970, carries 1,135 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 5-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,565 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

1
1930s

4
1950s

2
1960s

6
1970s

13
1980s

14
1990s

4
2000s

23
2010s

7
2020s

5

What this shows Construction peaked in the 2000s, when 23 of the county's bridges still in the inventory were built, which is 29.1% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1988, 10 years newer than the Kentucky average of 1978.

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

The 5 Kentucky counties nearest Grant County in number of bridges, with their condition splits. Its 6.3% Poor share is the 5th-lowest of these 6. Its average build year of 1988 against a peer-group mean of 1974 is 14 years newer.

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

Bridge inventory size and condition shares for Grant County and the 5 Kentucky counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Nicholas County	82	31.7%	63.4%	4.9%	1973
Todd County	80	16.3%	76.3%	7.5%	1972
Grant County (this page)	79	55.7%	38%	6.3%	1988
Lyon County	78	25.6%	70.5%	3.8%	1972
Metcalfe County	78	10.3%	87.2%	2.6%	1975
Wolfe County	77	54.5%	41.6%	3.9%	1979

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

Similar inventory size

Nearest county inventories outside KY (79 bridges here).

Cleveland County, AR · 79 bridges
Woodruff County, AR · 79 bridges
Barrow County, GA · 79 bridges
Edwards County, IL · 79 bridges

Similar average build year

Nearest mean year-built outside KY (1988 here).

Travis County, TX · avg 1988 · 1,544 bridges
Grant County, OK · avg 1988 · 476 bridges
Loudoun County, VA · avg 1988 · 442 bridges
Licking County, OH · avg 1988 · 439 bridges

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

All 79 Good 44 Fair 30 Poor 5

Good-condition bridges (44)

Sort:

Grant County Bridge Snapshot

Condition distribution

Grant County's Poor-condition bridges carry 1,565 vehicle crossings a day

26.6% of Grant County's bridges have passed the 50-year mark

One structure carries 72.5% of the county's Poor-condition bridge traffic

How Grant 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

Good-condition bridges (44)

KY 22

US-25

KY-36

KY-1132

TURNER ROAD CR1146

NAPOLEON-ZION STAT

LUSBY MILL ROAD

KY-1942

KY-3088

KY 330

BLANCHET ROAD

KY-2942

BARNES PIKE

U.S. 25

KY 22

KY 22

KY-1132

BARNES PIKE

TURNER RIDGE ROAD

US-0025

SIPPLE ROAD

BANNISTER PIKE

KY-22

KY-1994

MASON-SIPPLE ROAD

ARNOLDS CREEK ROAD

MASON SIPPLE ROAD

I-75 NORTHBOUND

KY 2937 HEEKIN RD

I-75 SOUTHBOUND

KY-36

BATON ROUGE RD.

KY-1993

CS-4009

KY-1993

KY-1993

EIBECK LANE

KY-2936

KY-2936

KY-330

NAPOLEON-ZION STAT

CYNTHIANA ROAD

KY-491

EAGLE TUNNEL RD

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