Total bridges
167
Public highway bridges in Monroe County
County profile · official public datasets
Monroe County, OH
167 public highway bridges tracked in the FHWA National Bridge Inventory: 42.5% rated Good, 47.3% Fair, 10.2% Poor.
- 167
- Public bridges
- 42.5%
- Good condition
- 10.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Monroe County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 84th
- of 88 on Poor share
- 10.2%
- Poor-condition share
- 167
- public highway bridges
- 1963
- 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.
Monroe County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Monroe County ranks #84 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 10.2%). Monroe County, Ohio contains 167 public highway bridges. Roughly 42.5% are rated “Good,” 47.3% “Fair,” and 10.2% “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
42.5%
71 of 167 rated 7-9
Fair condition
47.3%
79 of 167 rated 5-6
Poor condition
10.2%
17 of 167 rated 4 or below
In-state Poor-share rank
#84 of 88
Among Ohio counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 167 NBI-tracked bridges by lowest applicable component rating.
Good 42.5% (71)
Fair 47.3% (79)
Poor 10.2% (17)
Monroe County's Poor-condition bridges carry 2,528 vehicle crossings a day
That is 2.3% of the county's reported daily bridge traffic on 10.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 149 crossings a day against 750 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 167 of 167 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
50.9% of Monroe County's bridges have passed the 50-year mark
85 of the 167 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 42.5% 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 22.2% of the county's Poor-condition bridge traffic
SR 379 over WILLS CREEK, built 1961, carries 560 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 17-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 2,528 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Monroe County's bridges were built
167 bridges with a recorded construction year, grouped by decade
- pre-1900 2
Built before 1900
2 bridges
- 1900s
1900–1909
43 bridges
- 1910s 1
1910–1919
1 bridges
- 1920s 3
1920–1929
3 bridges
- 1930s 6
1930–1939
6 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 14
1950–1959
14 bridges
- 1960s 10
1960–1969
10 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s 7
1980–1989
7 bridges
- 1990s
1990–1999
20 bridges
- 2000s
2000–2009
21 bridges
- 2010s
2010–2019
27 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1900s, when 43 of the county's bridges still in the inventory were built, which is 25.7% of those with a recorded year. That cohort is now 115 to 124 years old in the 2024 inventory. Its average build year is 1963, 14 years older than the Ohio average of 1977.
How Monroe County compares with Ohio's closest counties by inventory size
The 5 Ohio counties nearest Monroe County in number of bridges, with their condition splits. Its 10.2% Poor share is the 6th-lowest of these 6. Its average build year of 1963 against a peer-group mean of 1977 is 14 years older.
Showing the 5 closest of 87 Ohio counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Paulding County | 176 | 69.3% | 24.4% | 6.3% | 1986 |
| Perry County | 175 | 66.9% | 31.4% | 1.7% | 1974 |
| Monroe County (this page) | 167 | 42.5% | 47.3% | 10.2% | 1963 |
| Morgan County | 159 | 52.8% | 43.4% | 3.8% | 1962 |
| Defiance County | 158 | 77.8% | 20.9% | 1.3% | 1991 |
| Ottawa County | 158 | 65.8% | 32.9% | 1.3% | 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 Monroe 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 Monroe County, both outside Ohio so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OH (167 bridges here).
- Cherokee County, AL · 167 bridges
- Garfield County, CO · 167 bridges
- Mitchell County, IA · 167 bridges
- Ness County, KS · 167 bridges
Similar average build year
Nearest mean year-built outside OH (1963 here).
- Worcester County, MA · avg 1963 · 1,014 bridges
- Honolulu County, HI · avg 1963 · 682 bridges
- Chester County, PA · avg 1963 · 680 bridges
- Essex County, NJ · avg 1963 · 505 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (17)
ALTITUDE MILLER RD
PoorOver: SUNFISH CREEK
10 SOUTH OF JCT CR 29, Monroe, OH
Built 1910 Load: 2.7 t ADT: 209
JACKSON TWP 1206
PoorOver: MILLER RUN
0.20MI. W. OF SR 7, Monroe, OH
Built 1900 Load: 2.7 t ADT: 2
TWP RD 183
PoorOver: PAINE RUN
0.13 MI N. OF JCT. CR 29, Monroe, OH
Built 1900 Load: 6.5 t ADT: 96
TWP RD 307
PoorOver: CLEAR FORK
0.75 N. OF JCT. CR 15, Monroe, OH
Built 1900 Load: 7.3 t ADT: 209
SR 537
PoorOver: RIAS RUN
1.64M E OF JCT SR 260, Monroe, OH
Built 1927 Load: 9.1 t ADT: 134
FARM LANE T2001
PoorOver: SENCE FORK WILLS CREEK
0.13 MI. E. SR 379, Monroe, OH
Built 1900 Load: 9.7 t ADT: 96
SALEM TWP RD 183
PoorOver: PAINE RUN
0.5 MI. N. OF JCT CR 29, Monroe, OH
Built 1966 Load: 10.9 t ADT: 96
TWP RD 562
PoorOver: LITTLE MUSKINGUM RIVER
1.82 MI E. OF JCT CR 12, Monroe, OH
Built 1900 Load: 13.6 t ADT: 209
TWP RD 919
PoorOver: NARROWS RUN
0.01 MI W. OF JCT CR 89, Monroe, OH
Built 1900 Load: 13.6 t ADT: 4
SR 260
PoorOver: WHITTEN CREEK
2.11M N WASH. CO. LINE, Monroe, OH
Built 1959 Load: 16.2 t ADT: 82
SR 379
PoorOver: WILLS CREEK
1.74M N OF JCT SR 78, Monroe, OH
Built 1961 Load: 19.8 t ADT: 560
TWP RD 472
PoorOver: WITTEN FORK
0.03 MI WEST OF JCT CR 10, Monroe, OH
Built 1900 Load: 22.4 t ADT: 209
TWP RD 1004
PoorOver: LITTLE MUSKINGUM RIVER
0.1 MI S. OF JCT CR 47, Monroe, OH
Built 1900 Load: 26.6 t ADT: 96
RIAS RUN
PoorOver: STRAIGHT FORK
1.4 MI NORTH OF JCT 26, Monroe, OH
Built 1900 Load: 36.0 t ADT: 25
SIX POINTS
PoorOver: CRANENEST FORK
0.98 MI EAST OF SR 255, Monroe, OH
Built 2013 Load: 39.5 t ADT: 385
SWI. TR 947
PoorOver: STREAM
0.66 MI. W. OF SR 7, Monroe, OH
Built 1997 Load: 53.1 t ADT: 96
SWI. TWP. 84
PoorOver: CATS RUN
0.01 MI. N OF TR199, Monroe, OH
Built 2005 Load: 77.8 t ADT: 20
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.