Total bridges
137
Public highway bridges in Mason County
County profile · official public datasets
Mason County, WV
137 public highway bridges tracked in the FHWA National Bridge Inventory: 32.8% rated Good, 51.1% Fair, 16.1% Poor.
- 137
- Public bridges
- 32.8%
- Good condition
- 16.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Mason 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 45%
- lowest Poor share in state
- 16.1%
- Poor-condition share
- 137
- public highway bridges
- 1989
- 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.
Mason County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Mason County ranks #25 of 55 West Virginia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 16.1%). Mason County, West Virginia contains 137 public highway bridges. Roughly 32.8% are rated “Good,” 51.1% “Fair,” and 16.1% “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
32.8%
45 of 137 rated 7-9
Fair condition
51.1%
70 of 137 rated 5-6
Poor condition
16.1%
22 of 137 rated 4 or below
In-state Poor-share rank
#25 of 55
Among West Virginia counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 137 NBI-tracked bridges by lowest applicable component rating.
Good 32.8% (45)
Fair 51.1% (70)
Poor 16.1% (22)
Mason County's Poor-condition bridges carry 31,310 vehicle crossings a day
That is 9.3% of the county's reported daily bridge traffic on 16.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,423 crossings a day against 1,806 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 137 of 137 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
19% of Mason County's bridges have passed the 50-year mark
26 of the 137 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 32.8% 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 35.8% of the county's Poor-condition bridge traffic
WV 817 over NINEMILE CREEK, built 1957, carries 11,200 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 22-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 31,310 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Mason County's bridges were built
137 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 1
1910–1919
1 bridges
- 1920s 5
1920–1929
5 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 7
1950–1959
7 bridges
- 1960s 4
1960–1969
4 bridges
- 1970s
1970–1979
17 bridges
- 1980s
1980–1989
14 bridges
- 1990s
1990–1999
30 bridges
- 2000s
2000–2009
13 bridges
- 2010s
2010–2019
31 bridges
- 2020s 8
2020–2029
8 bridges
What this shows Construction peaked in the 2010s, when 31 of the county's bridges still in the inventory were built, which is 22.6% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year is 1989, 9 years newer than the West Virginia average of 1980.
How Mason County compares with West Virginia's closest counties by inventory size
The 5 West Virginia counties nearest Mason County in number of bridges, with their condition splits. Its 16.1% Poor share is the 4th-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1980 is 9 years newer.
Showing the 5 closest of 54 West Virginia counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Mason County (this page) | 137 | 32.8% | 51.1% | 16.1% | 1989 |
| Putnam County | 135 | 32.6% | 51.9% | 15.6% | 1987 |
| Boone County | 131 | 23.7% | 60.3% | 16% | 1986 |
| Hardy County | 131 | 22.1% | 69.5% | 8.4% | 1982 |
| Roane County | 130 | 39.2% | 34.6% | 26.2% | 1976 |
| Ritchie County | 127 | 33.9% | 39.4% | 26.8% | 1967 |
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 Mason 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 Mason County, both outside West Virginia so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside WV (137 bridges here).
- Fremont County, CO · 137 bridges
- Prowers County, CO · 137 bridges
- Fremont County, ID · 137 bridges
- Orange County, IN · 137 bridges
Similar average build year
Nearest mean year-built outside WV (1989 here).
- Harris County, TX · avg 1989 · 4,029 bridges
- Mecklenburg County, NC · avg 1989 · 746 bridges
- Buffalo County, NE · avg 1989 · 459 bridges
- Brazos County, TX · avg 1989 · 370 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (70)
CR 29/1
FairOver: CRAB CREEK
0.04 MI SOUTH OF CR 29, Mason, WV
Built 1970 Load: 8.2 t ADT: 10
WV RTE 817
FairOver: UPPER FIVEMILE CK.
0.65 MI N OF CR 27, Mason, WV
Built 1925 Load: 18.1 t ADT: 400
CR 39
FairOver: EIGHTEENMILE CREEK
0.06 MI S OF CR 39/6, Mason, WV
Built 1984 Load: 19.0 t ADT: 10
WV 62
FairOver: TENMILE CREEK
1.99 MI N OF CR 23, Mason, WV
Built 2018 Load: 20.0 t ADT: 900
CR 6
FairOver: BROAD RUN
0.98 MI W OF WV 62, Mason, WV
Built 1918 Load: 21.8 t ADT: 200
COUNTY ROUTE 27/8
FairOver: SIXTEENMILE CREEK
0.01 MI N OF CR 54/2, Mason, WV
Built 1951 Load: 21.8 t ADT: 10
COUNTY ROUTE 72
FairOver: RIGHT HAND FK/SIXTEEN M
0.50 MILE EAST OF CR 74/1, Mason, WV
Built 2003 Load: 24.5 t ADT: 50
COUNTY ROUTE 78
FairOver: SIXTEENMILE CREEK
2.15 MI E OF CR 78/1, Mason, WV
Built 1982 Load: 25.4 t ADT: 10
WV RT 2
FairOver: SALT CREEK
0.04 MI S OF CR 32, Mason, WV
Built 1997 Load: 28.1 t ADT: 6,200
US35SB
FairOver: CR 78 & SIXTEENMILE CK
4.6 MI N OF CR 9, Mason, WV
Built 2018 Load: 28.1 t ADT: 8,000
US35NB
FairOver: CR 78 & SIXTEENMILE CK
4.6 MI N OF CR 9, Mason, WV
Built 2018 Load: 28.1 t ADT: 8,000
US35SB
FairOver: CR 29 & L Sixteenmile Ck
6.7 MI N OF CR 9, Mason, WV
Built 2018 Load: 29.9 t ADT: 8,000
US35NB
FairOver: CR 29 & L Sixteenmile Ck
6.7 MI N OF CR 9, Mason, WV
Built 2018 Load: 29.9 t ADT: 8,000
CR 23
FairOver: COOPER FK OF TENMILE CK
0.10 MI N OF CR 23/5, Mason, WV
Built 1988 Load: 30.8 t ADT: 700
US 35
FairOver: OHIO RIVER
0.40 MI W OF WV 2, Mason, WV
Built 1969 Load: 30.8 t ADT: 24,200
US 35 NB
FairOver: TWO MILE CREEK
0.2 MILE N. OF CR 817, Mason, WV
Built 2010 Load: 30.8 t ADT: 12,900
US 35 SB
FairOver: TWO MILE CREEK
0.2 MILE NORTH OF CR 817, Mason, WV
Built 2010 Load: 30.8 t ADT: 6,750
COUNTY ROUTE 27
FairOver: SIXTEENMILE CREEK
0.08 MI S OF CR 29, Mason, WV
Built 1904 Load: 33.6 t ADT: 20
US 35 SB
FairOver: CR38 & LOWER NINEMILE CK
1.84 MILES N. OF CR 40, Mason, WV
Built 2010 Load: 33.6 t ADT: 13,500
BYRD ACCESS BRIDGE
FairOver: OHIO RIVER (LOCKS)
R.C. BYRD LOCKS & DAM, Mason, WV
Built 1993 Load: 34.3 t ADT: 350
US 35
FairOver: WV 02
0.18 MI N OF WV 2, Mason, WV
Built 1970 Load: 34.5 t ADT: 10,100
KANAWHA STREET
FairOver: CROOKED CREEK
0.20 MI N OF WV 62, Mason, WV
Built 1949 Load: 34.5 t ADT: 500
CR 29
FairOver: CRAB CREEK
0.92 MI E OF CR 29/16, Mason, WV
Built 1980 Load: 35.4 t ADT: 500
WV 2
FairOver: EIGHTEENMILE CREEK
1.26 MI. N. OF CR 2/1, Mason, WV
Built 1978 Load: 36.3 t ADT: 4,000
CR 19
FairOver: BROAD RUN
0.42 MI. N. OF WV 62, Mason, WV
Built 1981 Load: 36.3 t ADT: 900
WV 2
FairOver: SIXTEENMILE CREEK
0.70 MI N OF CR41(F), Mason, WV
Built 1978 Load: 37.2 t ADT: 4,500
US 35 NB
FairOver: CR38 & LOWER NINEMILE CK
1.84 MILE N OF CR 40, Mason, WV
Built 2010 Load: 37.2 t ADT: 13,500
COUNTY ROUTE 4
FairOver: SLIDING HILL CREEK
1.55 MI N OF CR 6, Mason, WV
Built 1956 Load: 38.1 t ADT: 150
WV 62
FairOver: SLIDING HILL CREEK
0.93 MI E OF CR 1/4, Mason, WV
Built 1954 Load: 39.0 t ADT: 4,400
COUNTY ROUTE 78
FairOver: FORK OF SIXTEENMILE CR
0.26 NI E OF CR 78/4, Mason, WV
Built 1977 Load: 39.0 t ADT: 30
US 35 NB
FairOver: Upper 9 Mile Creek CR40
0.57 MI South Old Rt 35, Mason, WV
Built 2019 Load: 39.0 t ADT: 7,000
CR 35/10
FairOver: THIRTEENMILE CREEK
0.65 MI E OF WV 62, Mason, WV
Built 1997 Load: 39.9 t ADT: 350
US 35 SB
FairOver: THREEMILE CREEK
0.18 MILE S OF CR 34, Mason, WV
Built 2009 Load: 39.9 t ADT: 5,550
US 35 NB
FairOver: THREEMILE CREEK
0.18 MILE S OF CR 34, Mason, WV
Built 2009 Load: 39.9 t ADT: 5,550
COUNTY ROUTE 1/2
FairOver: SLIDING HILL CREEK
1.00 MI E OF CR 1, Mason, WV
Built 1977 Load: 40.8 t ADT: 150
CR 29/13
FairOver: LITTLE SIXTEENMILE CREEK
0.10 MI E OF CR 29, Mason, WV
Built 1992 Load: 40.8 t ADT: 40
US 35 NB
FairOver: CR27 & UPPER FIVEMILE CK
0.55 MILE S OF CR 36, Mason, WV
Built 2010 Load: 40.8 t ADT: 13,500
US 35 SOUTHBOUND
FairOver: CR27 & UPPER FIVEMILE CK
0.55 MILE S OF CR 36, Mason, WV
Built 2010 Load: 40.8 t ADT: 7,000
WV 62 SPUR
FairOver: CSX OHIO RIVER OH833
0.02 MILE N. OF 62, Mason, WV
Built 2008 Load: 41.7 t ADT: 9,577
CR 12
FairOver: WEST CREEK
0.11 MI W OF CR 10, Mason, WV
Built 1979 Load: 42.6 t ADT: 90
CR 12/7 SLS
FairOver: OLDTOWN CREEK
0.88 MI N OF CR 15 SLS, Mason, WV
Built 1977 Load: 42.6 t ADT: 90
CR 78/4
FairOver: BRANCH OF SIXTEENMILE CR
0.58 MI N OF CR 37/4, Mason, WV
Built 1977 Load: 42.6 t ADT: 10
CR. 29
FairOver: CRAB CREEK
0.03 MI E OF CR 29/5, Mason, WV
Built 1978 Load: 43.5 t ADT: 500
CR 6
FairOver: BROAD RUN
0.87 MI E OF CR 9/4, Mason, WV
Built 1986 Load: 43.5 t ADT: 200
US 35 SB
FairOver: Upper 9 Mile Creek CR40
0.57 MI South Old Rt 35, Mason, WV
Built 2019 Load: 44.4 t ADT: 8,000
CR 12
FairOver: POTTER CREEK
0.94 MILE EAST OF CR 11/1, Mason, WV
Built 2014 Load: 45.4 t ADT: 150
CR 6
FairOver: BROAD RUN
0.75 MI W OF WV 62, Mason, WV
Built 1980 Load: 47.2 t ADT: 200
CR 64
FairOver: WARNER BRANCH
1.070 MILE E OF CR 66, Mason, WV
Built 2005 Load: 47.2 t ADT: 50
CR 6
FairOver: BROAD RUN
0.22 MI E OF CR 9/4, Mason, WV
Built 1980 Load: 48.1 t ADT: 200
COUNTY ROUTE 6
FairOver: SEAMAN RUN
0.21 MI W OF WV 62, Mason, WV
Built 1987 Load: 48.1 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.