County profile · official public datasets

Monongalia County, WV

203 public highway bridges tracked in the FHWA National Bridge Inventory: 36.9% rated Good, 42.9% Fair, 20.2% Poor.

203
Public bridges: 36.9%
Good condition: 20.2%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Monongalia County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

31st
of 55 on Poor share: 20.2%
Poor-condition share: 203
public highway bridges: 1980
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.

Monongalia County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Monongalia County ranks #31 of 55 West Virginia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 20.2%). Monongalia County, West Virginia contains 203 public highway bridges. Roughly 36.9% are rated “Good,” 42.9% “Fair,” and 20.2% “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.

Total bridges

203

Public highway bridges in Monongalia County

Good condition

36.9%

75 of 203 rated 7-9

Fair condition

42.9%

87 of 203 rated 5-6

Poor condition

20.2%

41 of 203 rated 4 or below

In-state Poor-share rank

#31 of 55

Among West Virginia counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 203 NBI-tracked bridges by lowest applicable component rating.

Good

36.9% (75)

Fair

42.9% (87)

Poor

20.2% (41)

Monongalia County's Poor-condition bridges carry 927,950 vehicle crossings a day

That is 51.9% of the county's reported daily bridge traffic on 19.8% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 23,199 crossings a day against 4,323 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 202 of 203 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

40.9% of Monongalia County's bridges have passed the 50-year mark

83 of the 203 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 36.9% 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 64.7% of the county's Poor-condition bridge traffic

MON CO RT 19/25 over SCOTTS RUN, built 1930, carries 600,500 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 41-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 927,950 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1920s

9
1930s

12
1940s

1
1950s

9
1960s

20
1970s

42
1980s

26
1990s

33
2000s

28
2010s

20
2020s

1

What this shows Construction peaked in the 1970s, when 42 of the county's bridges still in the inventory were built, which is 20.7% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1980) matches the West Virginia average (1980).

How Monongalia County compares with West Virginia's closest counties by inventory size

The 5 West Virginia counties nearest Monongalia County in number of bridges, with their condition splits. Its 20.2% Poor share is the 4th-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1979 is in line with the group.

Showing the 5 closest of 54 West Virginia counties eligible for comparison.

Bridge inventory size and condition shares for Monongalia County and the 5 West Virginia counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Fayette County	211	19%	67.8%	13.3%	1982
Cabell County	207	25.1%	57.5%	17.4%	1984
Greenbrier County	207	22.7%	64.3%	13%	1979
Monongalia County (this page)	203	36.9%	42.9%	20.2%	1980
Marion County	193	48.2%	30.6%	21.2%	1977
Jackson County	191	38.2%	38.2%	23.6%	1973

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 Monongalia 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 Monongalia County, both outside West Virginia so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WV (203 bridges here).

Marengo County, AL · 203 bridges
Greene County, AL · 204 bridges
Flathead County, MT · 204 bridges
Pembina County, ND · 204 bridges

Similar average build year

Nearest mean year-built outside WV (1980 here).

Tulsa County, OK · avg 1980 · 1,135 bridges
Miami-Dade County, FL · avg 1980 · 1,057 bridges
Pulaski County, AR · avg 1980 · 721 bridges
McLennan County, TX · avg 1980 · 714 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 203 Good 75 Fair 87 Poor 41

Good-condition bridges (75)

Sort:

Monongalia County Bridge Snapshot

Condition distribution

Monongalia County's Poor-condition bridges carry 927,950 vehicle crossings a day

40.9% of Monongalia County's bridges have passed the 50-year mark

One structure carries 64.7% of the county's Poor-condition bridge traffic

How Monongalia County compares with West Virginia's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (75)

COUNTY ROUTE 14

US 19

WV 7

INTERSTATE 68

MGL CO RT 857/17

MON CO RT 49

WV ROUTE 7

MON CO 40/2 (SLS)

WV ROUTE 7

MON CO RT 76

WV Rt. 7

Mon Co 11

WV 7

WV 7

WV ROUTE 7

US 19

Mon. Co. 7/70

MGL CO RT 119/39

WV ROUTE 7

MGL CO RT 31

MONONGALIA CR 857

WV ROUTE 100

WV ROUTE 100

MGL CO RT 15/8

WV RT. 43

WV RT. 43

MON CO 46/7

MON CO 857 (SLS)

MGL CO RT 37/2

MONONGALIA CO 64/2

Mon Co 81/1

WV ROUTE 7

MONONGALIA CR 29

MON CO RT 7/18

MGL CO RT 19/40

WV RT. 43

WV RT. 43

MGL CO RT 26

Interstate 79

COUNTY ROUTE 58

MONONGALIA CR 7/52

MON CO RT 64/4

WV Rt. 43

MGL Co Rt 15

MGL CO RT 77/1

MONONGALIA CR 75

MGL CO RT 76/10

WV RT. 43

WV RT. 43

MON CO RT 7/13

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