Total bridges
44
Public highway bridges in Trimble County
County profile · official public datasets
Trimble County, KY
44 public highway bridges tracked in the FHWA National Bridge Inventory: 11.4% rated Good, 79.5% Fair, 9.1% Poor.
- 44
- Public bridges
- 11.4%
- Good condition
- 9.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Trimble County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- 87th
- of 120 on Poor share
- 9.1%
- Poor-condition share
- 44
- public highway bridges
- 1985
- 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.
Trimble County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Trimble County ranks #87 of 120 Kentucky counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.1%). Trimble County, Kentucky contains 44 public highway bridges. Roughly 11.4% are rated “Good,” 79.5% “Fair,” and 9.1% “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
11.4%
5 of 44 rated 7-9
Fair condition
79.5%
35 of 44 rated 5-6
Poor condition
9.1%
4 of 44 rated 4 or below
In-state Poor-share rank
#87 of 120
Among Kentucky counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 44 NBI-tracked bridges by lowest applicable component rating.
Good 11.4% (5)
Fair 79.5% (35)
Poor 9.1% (4)
Trimble County's Poor-condition bridges carry 4,013 vehicle crossings a day
That is 11.4% of the county's reported daily bridge traffic on 9.1% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,003 crossings a day against 640 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 44 of 44 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
22.7% of Trimble County's bridges have passed the 50-year mark
10 of the 44 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 11.4% 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 83.3% of the county's Poor-condition bridge traffic
KY 36 over CANIP CREEK, built 1933, carries 3,341 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 4-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 4,013 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Trimble County's bridges were built
44 bridges with a recorded construction year, grouped by decade
- 1930s 2
1930–1939
2 bridges
- 1950s
1950–1959
7 bridges
- 1960s 1
1960–1969
1 bridges
- 1970s 2
1970–1979
2 bridges
- 1980s
1980–1989
12 bridges
- 1990s
1990–1999
12 bridges
- 2000s 2
2000–2009
2 bridges
- 2010s 4
2010–2019
4 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1980s, when 12 of the county's bridges still in the inventory were built, which is 27.3% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1985, 7 years newer than the Kentucky average of 1978.
How Trimble County compares with Kentucky's closest counties by inventory size
The 5 Kentucky counties nearest Trimble County in number of bridges, with their condition splits. Its 9.1% Poor share is the 5th-lowest of these 6. Its average build year of 1985 against a peer-group mean of 1976 is 9 years newer.
Showing the 5 closest of 119 Kentucky counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Bracken County | 49 | 30.6% | 51% | 18.4% | 1983 |
| Menifee County | 49 | 34.7% | 65.3% | 0% | 1976 |
| Russell County | 46 | 21.7% | 69.6% | 8.7% | 1974 |
| Trimble County (this page) | 44 | 11.4% | 79.5% | 9.1% | 1985 |
| Lee County | 42 | 35.7% | 57.1% | 7.1% | 1977 |
| Clinton County | 41 | 17.1% | 75.6% | 7.3% | 1971 |
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 Trimble 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 Trimble County, both outside Kentucky so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside KY (44 bridges here).
- Archuleta County, CO · 44 bridges
- Bacon County, GA · 44 bridges
- Pulaski County, GA · 44 bridges
- Rockdale County, GA · 44 bridges
Similar average build year
Nearest mean year-built outside KY (1985 here).
- Hillsborough County, FL · avg 1985 · 840 bridges
- Lancaster County, NE · avg 1985 · 661 bridges
- Nueces County, TX · avg 1985 · 528 bridges
- Grayson County, TX · avg 1985 · 513 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (5)
DAUGHERTY CREEK RD
GoodOver: TRIB TO DAUGHERTY CRK
90 FT W OF LOUDEN LN, Trimble, KY
Built 2023 Load: 35.7 t ADT: 90
US 421
GoodOver: TRIB TO TOWN BRANCH
0.75 MI S OF US 42, Trimble, KY
Built 1984 Load: 39.9 t ADT: 2,170
LOUDEN LN
GoodOver: DAUGHERTY CREEK
130 FT S OF JONES LN, Trimble, KY
Built 2023 Load: 41.9 t ADT: 250
KY 2871
GoodOver: LITTLE KENTUCKY RIVER
210 FT W OF KY 1335, Trimble, KY
Built 2018 Load: 64.2 t ADT: 491
KY 625
GoodOver: CORN CREEK
100 FT N OF JOYCE MILL RD, Trimble, KY
Built 2010 Load: 67.4 t ADT: 200
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.