Total bridges
232
Public highway bridges in Dyer County
County profile · official public datasets
Dyer County, TN
232 public highway bridges tracked in the FHWA National Bridge Inventory: 29.7% rated Good, 62.1% Fair, 8.2% Poor.
- 232
- Public bridges
- 29.7%
- Good condition
- 8.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Dyer County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 85th
- of 95 on Poor share
- 8.2%
- Poor-condition share
- 232
- public highway bridges
- 1979
- 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.
Dyer County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Dyer County ranks #85 of 95 Tennessee counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.2%). Dyer County, Tennessee contains 232 public highway bridges. Roughly 29.7% are rated “Good,” 62.1% “Fair,” and 8.2% “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.
Good condition
29.7%
69 of 232 rated 7-9
Fair condition
62.1%
144 of 232 rated 5-6
Poor condition
8.2%
19 of 232 rated 4 or below
In-state Poor-share rank
#85 of 95
Among Tennessee counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 232 NBI-tracked bridges by lowest applicable component rating.
Good 29.7% (69)
Fair 62.1% (144)
Poor 8.2% (19)
Dyer County's Poor-condition bridges carry 47,358 vehicle crossings a day
That is 5.5% of the county's reported daily bridge traffic on 8.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,493 crossings a day against 3,041 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 232 of 232 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
25% of Dyer County's bridges have passed the 50-year mark
58 of the 232 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 29.7% 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 29.9% of the county's Poor-condition bridge traffic
FAP 20 over N FORK FORKED DEER RIVER, built 1994, carries 14,181 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 19-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 47,358 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Dyer County's bridges were built
232 bridges with a recorded construction year, grouped by decade
- 1920s 13
1920–1929
13 bridges
- 1930s 8
1930–1939
8 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s 13
1950–1959
13 bridges
- 1960s 17
1960–1969
17 bridges
- 1970s
1970–1979
47 bridges
- 1980s
1980–1989
67 bridges
- 1990s
1990–1999
37 bridges
- 2000s 14
2000–2009
14 bridges
- 2010s 10
2010–2019
10 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1980s, when 67 of the county's bridges still in the inventory were built, which is 28.9% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1979) matches the Tennessee average (1977).
How Dyer County compares with Tennessee's closest counties by inventory size
The 5 Tennessee counties nearest Dyer County in number of bridges, with their condition splits. Its 8.2% Poor share is the 6th-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1976 is in line with the group.
Showing the 5 closest of 94 Tennessee counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Dickson County | 243 | 58.8% | 35.8% | 5.3% | 1975 |
| Haywood County | 241 | 35.3% | 60.2% | 4.6% | 1976 |
| Carroll County | 240 | 37.9% | 60% | 2.1% | 1982 |
| Marshall County | 240 | 56.3% | 43.8% | 0% | 1968 |
| Dyer County (this page) | 232 | 29.7% | 62.1% | 8.2% | 1979 |
| Hardeman County | 223 | 30% | 67.3% | 2.7% | 1980 |
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 Dyer 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 Dyer County, both outside Tennessee so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TN (232 bridges here).
- Douglas County, IL · 232 bridges
- Monroe County, IN · 232 bridges
- Pearl River County, MS · 232 bridges
- Gaston County, NC · 232 bridges
Similar average build year
Nearest mean year-built outside TN (1979 here).
- Pima County, AZ · avg 1979 · 1,150 bridges
- Jefferson County, KY · avg 1979 · 662 bridges
- Spartanburg County, SC · avg 1979 · 638 bridges
- McPherson County, KS · avg 1979 · 586 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (19)
NFA A208
PoorOver: DRAINAGE DITCH
2.4 MI S OF SR103, Dyer, TN
Built 1970 Load: 0.0 t ADT: 10
NFA A282
PoorOver: BRANCH
3 MI N OF NEWBERN, Dyer, TN
Built 1990 Load: 0.0 t ADT: 50
FAP 20
PoorOver: N FORK FORKED DEER RIVER
3.5 MI SE JCT SR3 & SR211, Dyer, TN
Built 1994 Load: 14.9 t ADT: 14,181
NFA 1435 (SA 2310)
PoorOver: BIFFLE CREEK
3 MI. S. OF OBION CO., Dyer, TN
Built 1930 Load: 17.2 t ADT: 400
NFA A378
PoorOver: BRANCH
1 MI N OF SR104, Dyer, TN
Built 1965 Load: 19.8 t ADT: 40
FAS 104
PoorOver: OBION RIVER
3.3 M W JCT SR20&SR182, Dyer, TN
Built 1948 Load: 22.7 t ADT: 483
NFA A251
PoorOver: BRANCH
4 MI W OF NEWBERN, Dyer, TN
Built 1983 Load: 23.0 t ADT: 920
NFA A426
PoorOver: BRANCH
4 MI W OF SR20, Dyer, TN
Built 1970 Load: 23.7 t ADT: 100
NFA 827
PoorOver: BRANCH
3.5 MI NE JCT SR20&SR104, Dyer, TN
Built 1982 Load: 25.3 t ADT: 759
NFA A615
PoorOver: BRANCH
7 MI S OF SR20, Dyer, TN
Built 1980 Load: 26.9 t ADT: 40
FAU 211
PoorOver: N. FORK FORKED DEER RIVE
IN DYERSBURG, Dyer, TN
Built 1933 Load: 27.0 t ADT: 5,963
FAU 211
PoorOver: BRANCH
2.4 M NE JCT SR3 &SR211, Dyer, TN
Built 1922 Load: 27.9 t ADT: 5,117
NFA 1433 (SA 2308)
PoorOver: OVERFLOW
4.6 MI NE JCT SR78&SR103, Dyer, TN
Built 1957 Load: 27.9 t ADT: 730
NFA 1433 (SA 2308)
PoorOver: OVERFLOW
1 MI S OF OBION CO, Dyer, TN
Built 1957 Load: 27.9 t ADT: 730
NFA 1433 (SA 2308)
PoorOver: OBION RIVER
1 MI S OF OBION CO, Dyer, TN
Built 1957 Load: 30.5 t ADT: 730
NFA 1502 (SA 2317)
PoorOver: BRANCH
2 MI N OF SR104, Dyer, TN
Built 1984 Load: 32.4 t ADT: 323
FAS 182
PoorOver: LEWIS CREEK
3.25 MI W OF DYERSBURG, Dyer, TN
Built 1960 Load: 32.4 t ADT: 1,462
FAP 20
PoorOver: SR 20 WB / ICG RAILROAD
3.2 MI NE JCT SR 3&SR 104, Dyer, TN
Built 1985 Load: 32.4 t ADT: 11,746
FAP 78
PoorOver: DRAINAGE CANAL
NORTH OF CALVARY, Dyer, TN
Built 1926 Load: 32.4 t ADT: 3,574
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.