Total bridges
79
Public highway bridges in Grant County
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.
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.
When Grant County's bridges were built
79 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1930s 4
1930–1939
4 bridges
- 1950s 2
1950–1959
2 bridges
- 1960s 6
1960–1969
6 bridges
- 1970s
1970–1979
13 bridges
- 1980s
1980–1989
14 bridges
- 1990s 4
1990–1999
4 bridges
- 2000s
2000–2009
23 bridges
- 2010s 7
2010–2019
7 bridges
- 2020s 5
2020–2029
5 bridges
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.
| 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.
Poor-condition bridges (5)
CHERRY GROVE ROAD
PoorOver: NS (CNO&TP) SYSTEM
0.5 MI. EAST OF US. 25, Grant, KY
Built 1920 Load: 0.1 t ADT: 105
KY-491
PoorOver: BULLOCK CREEK
ON BOONE - GRANT CL, Grant, KY
Built 1970 Load: 14.9 t ADT: 1,135
CLARKS CREEK ROAD
PoorOver: CLARKS CREEK
.5 MI N OF JCT KY 36, Grant, KY
Built 1970 Load: 15.9 t ADT: 93
FORDS MILL ROAD
PoorOver: CLARKS CREEK
1 MI NW OF JCT KY 36, Grant, KY
Built 1970 Load: 18.8 t ADT: 93
DRY RIDGE-MOUNT ZI
PoorOver: ARNOLDS CREEK
.8 MI S OF JCT KY 1994, Grant, KY
Built 1965 Load: 50.3 t ADT: 139
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.