Total bridges
117
Public highway bridges in Alleghany County
County profile · official public datasets
Alleghany County, NC
117 public highway bridges tracked in the FHWA National Bridge Inventory: 47% rated Good, 41.9% Fair, 11.1% Poor.
- 117
- Public bridges
- 47%
- Good condition
- 11.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Alleghany County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 85th
- of 100 on Poor share
- 11.1%
- Poor-condition share
- 117
- public highway bridges
- 1982
- 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.
Alleghany County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Alleghany County ranks #85 of 100 North Carolina counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.1%). Alleghany County, North Carolina contains 117 public highway bridges. Roughly 47% are rated “Good,” 41.9% “Fair,” and 11.1% “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
47%
55 of 117 rated 7-9
Fair condition
41.9%
49 of 117 rated 5-6
Poor condition
11.1%
13 of 117 rated 4 or below
In-state Poor-share rank
#85 of 100
Among North Carolina counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 117 NBI-tracked bridges by lowest applicable component rating.
Good 47% (55)
Fair 41.9% (49)
Poor 11.1% (13)
Alleghany County's Poor-condition bridges carry 7,685 vehicle crossings a day
That is 9% of the county's reported daily bridge traffic on 11.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 591 crossings a day against 769 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 117 of 117 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
40.2% of Alleghany County's bridges have passed the 50-year mark
47 of the 117 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 47% 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 17.5% of the county's Poor-condition bridge traffic
BLUE RIDGE PARKWAY over BIG PINE CREEK, built 1937, carries 1,347 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 13-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 7,685 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Alleghany County's bridges were built
117 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s
1930–1939
14 bridges
- 1950s
1950–1959
10 bridges
- 1960s
1960–1969
18 bridges
- 1970s 7
1970–1979
7 bridges
- 1980s
1980–1989
16 bridges
- 1990s
1990–1999
12 bridges
- 2000s
2000–2009
12 bridges
- 2010s
2010–2019
22 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 2010s, when 22 of the county's bridges still in the inventory were built, which is 18.8% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year (1982) matches the North Carolina average (1986).
How Alleghany County compares with North Carolina's closest counties by inventory size
The 5 North Carolina counties nearest Alleghany County in number of bridges, with their condition splits. Its 11.1% Poor share is the 6th-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1990 is 8 years older.
Showing the 5 closest of 99 North Carolina counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Martin County | 124 | 45.2% | 51.6% | 3.2% | 1988 |
| Bladen County | 123 | 64.2% | 34.1% | 1.6% | 1992 |
| New Hanover County | 123 | 65% | 31.7% | 3.3% | 1995 |
| Franklin County | 118 | 46.6% | 47.5% | 5.9% | 1990 |
| Alleghany County (this page) | 117 | 47% | 41.9% | 11.1% | 1982 |
| Pender County | 112 | 33.9% | 63.4% | 2.7% | 1983 |
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 Alleghany 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 Alleghany County, both outside North Carolina so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside NC (117 bridges here).
- Franklin County, GA · 117 bridges
- Polk County, GA · 117 bridges
- Clark County, KY · 117 bridges
- Fleming County, KY · 117 bridges
Similar average build year
Nearest mean year-built outside NC (1982 here).
- Oklahoma County, OK · avg 1982 · 1,216 bridges
- Jackson County, MO · avg 1982 · 930 bridges
- Milwaukee County, WI · avg 1982 · 893 bridges
- Champaign County, IL · avg 1982 · 727 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (117)
SR1125
GoodOver: PINE SWAMP CREEK
.1 MI.W.JCT.SR1123, Alleghany, NC
Built 1986 Load: 84.3 t ADT: 170
SR1169
GoodOver: ELK CREEK
.4 MI.N.JCT.SR1163, Alleghany, NC
Built 2003 Load: 89.8 t ADT: 20
GRAVEL DRIVE
GoodOver: UT TO BIG SANDY CREEK
0.2 MI. N. OF JCT SR 1186, Alleghany, NC
Built 1960 Load: 89.8 t ADT: 300
BLUE RIDGE PARKWAY
GoodOver: LITTLE GLADE CREEK
1.1 MILES FROM NC ROUTE 1, Alleghany, NC
Built 1937 Load: 89.8 t ADT: 1,347
STONE MTN.RD.
PoorOver: STONE MOUNTAIN CREEK
2.6 MI.N.JCT.SR1100, Alleghany, NC
Built 1960 Load: 9.9 t ADT: 100
SR1144
PoorOver: MEADOW FORK CREEK
25 FT.S.JCT.SR1145, Alleghany, NC
Built 1960 Load: 10.8 t ADT: 50
SR1403
PoorOver: UT TO NEW RIVER
.200 FT.S.JCT.US21 221, Alleghany, NC
Built 1974 Load: 16.3 t ADT: 270
SR1131
PoorOver: WATERFALLS CREEK
.15 MI.S.JCT.SR1129, Alleghany, NC
Built 1963 Load: 17.2 t ADT: 10
BLUE RIDGE PARKWAY
PoorOver: BIG PINE CREEK
1.3 MILES FROM NC ROUTE 1, Alleghany, NC
Built 1938 Load: 19.0 t ADT: 1,347
SR1149
PoorOver: PRATHER CREEK
.2 MI.S.JCT.SR1161, Alleghany, NC
Built 1967 Load: 19.9 t ADT: 120
BLUE RIDGE PARKWAY
PoorOver: BIG PINE CREEK
0.9 MILES FROM NC ROUTE 1, Alleghany, NC
Built 1937 Load: 20.0 t ADT: 1,347
BLUE RIDGE PARKWAY
PoorOver: BIG PINE CREEK
0.3 MILES FROM NC ROUTE 1, Alleghany, NC
Built 1937 Load: 22.7 t ADT: 1,347
BLUE RIDGE PARKWAY
PoorOver: BRUSH CREEK
2.0 MILES FROM U.S. ROUTE, Alleghany, NC
Built 1936 Load: 22.7 t ADT: 1,347
SR1433
PoorOver: BRUSH CREEK
20 FT.W.JCT.SR1465, Alleghany, NC
Built 1959 Load: 30.8 t ADT: 80
BLUE RIDGE PARKWAY
PoorOver: BIG PINE CREEK
1.3 MILES FROM NC ROUTE 1, Alleghany, NC
Built 1937 Load: 35.4 t ADT: 1,347
SR1345
PoorOver: ROCK CREEK
.5 MI.S.JCT.SR1342, Alleghany, NC
Built 1989 Load: 71.6 t ADT: 130
SR1359
PoorOver: KINGS CREEK
100 FT.N.JCT.SR1308, Alleghany, NC
Built 1982 Load: 89.8 t ADT: 190
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.