Total bridges
119
Public highway bridges in Hamblen County
County profile · official public datasets
Hamblen County, TN
119 public highway bridges tracked in the FHWA National Bridge Inventory: 17.6% rated Good, 79.8% Fair, 2.5% Poor.
- 119
- Public bridges
- 17.6%
- Good condition
- 2.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Hamblen County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 26%
- lowest Poor share in state
- 2.5%
- Poor-condition share
- 119
- public highway bridges
- 1976
- 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.
Hamblen County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Hamblen County ranks #25 of 95 Tennessee counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.5%). Hamblen County, Tennessee contains 119 public highway bridges. Roughly 17.6% are rated “Good,” 79.8% “Fair,” and 2.5% “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
17.6%
21 of 119 rated 7-9
Fair condition
79.8%
95 of 119 rated 5-6
Poor condition
2.5%
3 of 119 rated 4 or below
In-state Poor-share rank
#25 of 95
Among Tennessee counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 119 NBI-tracked bridges by lowest applicable component rating.
Good 17.6% (21)
Fair 79.8% (95)
Poor 2.5% (3)
Hamblen County's Poor-condition bridges carry 48,727 vehicle crossings a day
That is 2.9% of the county's reported daily bridge traffic on 2.5% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 16,242 crossings a day against 7,786 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 119 of 119 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
51.3% of Hamblen County's bridges have passed the 50-year mark
61 of the 119 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 17.6% 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 93.8% of the county's Poor-condition bridge traffic
I81 over FLAT CREEK, built 1970, carries 45,697 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 3-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 48,727 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Hamblen County's bridges were built
119 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s 2
1930–1939
2 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s 5
1950–1959
5 bridges
- 1960s
1960–1969
20 bridges
- 1970s
1970–1979
39 bridges
- 1980s
1980–1989
16 bridges
- 1990s
1990–1999
18 bridges
- 2000s 3
2000–2009
3 bridges
- 2010s 8
2010–2019
8 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1970s, when 39 of the county's bridges still in the inventory were built, which is 32.8% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1976) matches the Tennessee average (1977).
How Hamblen County compares with Tennessee's closest counties by inventory size
The 5 Tennessee counties nearest Hamblen County in number of bridges, with their condition splits. Its 2.5% Poor share is the 2nd-lowest of these 6. Its average build year of 1976 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 |
|---|---|---|---|---|---|
| Chester County | 127 | 38.6% | 57.5% | 3.9% | 1983 |
| Jefferson County | 122 | 13.9% | 74.6% | 11.5% | 1966 |
| Morgan County | 120 | 48.3% | 45% | 6.7% | 1981 |
| Hamblen County (this page) | 119 | 17.6% | 79.8% | 2.5% | 1976 |
| Houston County | 118 | 45.8% | 50.8% | 3.4% | 1978 |
| Loudon County | 117 | 53% | 45.3% | 1.7% | 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 Hamblen 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 Hamblen County, both outside Tennessee so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TN (119 bridges here).
- Carroll County, AR · 119 bridges
- Grant County, AR · 119 bridges
- Stafford County, KS · 119 bridges
- Grayson County, KY · 119 bridges
Similar average build year
Nearest mean year-built outside TN (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (119)
NFA B210
GoodOver: SOU RWY& SINKING CR.
IN CITY OF MORRISTOWN, Hamblen, TN
Built 2002 Load: 29.2 t ADT: 500
NFA 2524 (SA 3202)
GoodOver: BUSBY CREEK
1MI NORTHEAST OF US11E, Hamblen, TN
Built 1943 Load: 32.4 t ADT: 2,735
NFA A314
GoodOver: SPRING CREEK
.3MI EAST OF SR32, Hamblen, TN
Built 2022 Load: 32.4 t ADT: 780
NFA A683
GoodOver: TURKEY CREEK
.5MI EAST OF SR32, Hamblen, TN
Built 2017 Load: 32.4 t ADT: 980
NFA 1314
GoodOver: BAILEY BRANCH
.1MI EAST OF I81, Hamblen, TN
Built 1966 Load: 32.4 t ADT: 829
FAP 32
GoodOver: SR 32 RL / I81
.4 M W OF HAMBLEN JEFF CO, Hamblen, TN
Built 2014 Load: 32.4 t ADT: 11,150
RAMP SR32 TO I81SB
GoodOver: SR-32 RAMP/NORF SO RR
0.24M.FROM JEFFERSON CO.L, Hamblen, TN
Built 2013 Load: 32.4 t ADT: 49,004
FAU 3843
GoodOver: TURKEY CREEK
IN MORRISTOWN CITY LIMITS, Hamblen, TN
Built 1997 Load: 32.4 t ADT: 1,064
NFA 1320 (SA 3212)
GoodOver: YOUNG CREEK
3MI EAST OF SR32, Hamblen, TN
Built 1950 Load: 32.4 t ADT: 456
COLLEGE PARK DR
GoodOver: SR-32
SOUTH OF US-11E, Hamblen, TN
Built 2014 Load: 32.4 t ADT: 20,960
SR 32
GoodOver: RETAIL RD
SOUTH OF US-11E, Hamblen, TN
Built 2014 Load: 32.4 t ADT: 32,269
SR 32
GoodOver: RETAIL RD
SOUTH OF US-11E, Hamblen, TN
Built 2014 Load: 32.4 t ADT: 32,269
FAP 66
GoodOver: SR 160
NEAR JCT SR474, Hamblen, TN
Built 2017 Load: 32.4 t ADT: 2,159
FAP 66
GoodOver: NFA 02522
NEAR JCT SR474, Hamblen, TN
Built 2017 Load: 32.4 t ADT: 2,159
FAS 113
GoodOver: BENT CREEK
.8 MI NE JCT SR34&SR113, Hamblen, TN
Built 1999 Load: 32.4 t ADT: 1,196
NFA A512
GoodOver: I81
NEAR MORRISTOWN, Hamblen, TN
Built 1967 Load: 32.7 t ADT: 100
FAS 340
PoorOver: BRANCH
1 M SE OF I81, Hamblen, TN
Built 1941 Load: 11.0 t ADT: 1,770
NFA A251
PoorOver: SPRING BRANCH
3 MI WEST OF US25, Hamblen, TN
Built 1955 Load: 26.2 t ADT: 1,260
I81
PoorOver: FLAT CREEK
4.70M.FROM JEFFERSON CO.L, Hamblen, TN
Built 1970 Load: 32.4 t ADT: 45,697
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.