County profile · official public datasets

Shelby County, OH

277 public highway bridges tracked in the FHWA National Bridge Inventory: 74% rated Good, 23.5% Fair, 2.5% Poor.

277
Public bridges
74%
Good condition
2.5%
Poor condition

The verdict

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

Shelby 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 35%
lowest Poor share in state
2.5%
Poor-condition share
277
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.

Shelby County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Shelby County ranks #31 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.5%). Shelby County, Ohio contains 277 public highway bridges. Roughly 74% are rated “Good,” 23.5% “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.

Total bridges

277

Public highway bridges in Shelby County

Good condition

74%

205 of 277 rated 7-9

Fair condition

23.5%

65 of 277 rated 5-6

Poor condition

2.5%

7 of 277 rated 4 or below

In-state Poor-share rank

#31 of 88

Among Ohio counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 277 NBI-tracked bridges by lowest applicable component rating.

Good
74% (205)
Fair
23.5% (65)
Poor
2.5% (7)

Shelby County's Poor-condition bridges carry 2,814 vehicle crossings a day

That is 0.3% of the county's reported daily bridge traffic on 2.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 469 crossings a day against 2,331 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 276 of 277 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

25.6% of Shelby County's bridges have passed the 50-year mark

71 of the 277 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 74% 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 35.5% of the county's Poor-condition bridge traffic

SPRUCE AVENUE over CSX RAILROAD, built 1924, carries 1,000 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 7-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,814 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Shelby County's bridges were built

277 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 2000s, when 88 of the county's bridges still in the inventory were built, which is 31.8% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1989, 12 years newer than the Ohio average of 1977.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Shelby County compares with Ohio's closest counties by inventory size

The 5 Ohio counties nearest Shelby County in number of bridges, with their condition splits. Its 2.5% 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 87 Ohio counties eligible for comparison.

Bridge inventory size and condition shares for Shelby County and the 5 Ohio counties closest to it in inventory size
County Bridges Poor
Ashland County 283 2.5%
Logan County 281 1.1%
Shelby County (this page) 277 2.5%
Hardin County 276 7.2%
Seneca County 275 1.5%
Knox County 274 5.5%

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 Shelby 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 Shelby County, both outside Ohio so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OH (277 bridges here).

Similar average build year

Nearest mean year-built outside OH (1989 here).

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

All 277 Good 205 Fair 65 Poor 7

All bridges (277)

CR-8

Fair

Over: IR 75

1.38MI S OF JCT SR-47, Shelby, OH

Built 1961 Load: 37.6 t ADT: 8,472

STALEY ROAD

Fair

Over: CLAY CREEK

.38 M.S. AMSTERDAM ROAD, Shelby, OH

Built 1975 Load: 37.6 t ADT: 385

IR-75

Fair

Over: CR 48 CAMPBELL STREET

.52MI S OF JCT SR-47, Shelby, OH

Built 1961 Load: 38.9 t ADT: 22,355

IR-75

Fair

Over: CR 48 CAMPBELL STREET

.52MI S OF JCT SR-47, Shelby, OH

Built 1961 Load: 38.9 t ADT: 22,355

IR-75

Fair

Over: B & O RR

.35MI. N. OF JCT. SR-29, Shelby, OH

Built 1961 Load: 38.9 t ADT: 20,407

RUSSELL ROAD

Fair

Over: TURTLE CREEK

.49 M.E. PATTERSON HALPIN, Shelby, OH

Built 1985 Load: 39.2 t ADT: 198

SOUTHLAND ROAD

Fair

Over: MUDDY CREEK

0.57 MI. W. KETTLERSVILLE, Shelby, OH

Built 1990 Load: 40.2 t ADT: 178

RUSSELL ROAD

Fair

Over: CSX RAILROAD

.28 M.E. 4TH AVENUE, Shelby, OH

Built 1975 Load: 40.5 t ADT: 11,206

STALEY ROAD

Fair

Over: LORAMIE CREEK

.26 M.N. AMSTERDAM ROAD, Shelby, OH

Built 1987 Load: 41.1 t ADT: 385

MIAMI SHELBY EAST

Fair

Over: LEATHERWOOD CREEK

.64 M.E. SR.589, Shelby, OH

Built 1987 Load: 41.8 t ADT: 274

IR-75

Fair

Over: LORAMIE CREEK

.71MI.S.OF JCT. SR-219, Shelby, OH

Built 1962 Load: 42.1 t ADT: 18,048

HOUSTON ROAD

Fair

Over: LORAMIE CREEK

.46 MI. W. DAWSON, Shelby, OH

Built 1988 Load: 42.4 t ADT: 591

STANGEL ROAD

Fair

Over: TURTLE CREEK

1.11 MI. W. LINDSEY, Shelby, OH

Built 1986 Load: 43.1 t ADT: 582

MASON ROAD

Fair

Over: TURTLE CREEK

.39 M.W. HARDIN WAPAK, Shelby, OH

Built 1967 Load: 48.6 t ADT: 433

SR-29

Fair

Over: CSX RR

.68MI SE OF JCT IR-75, Shelby, OH

Built 2005 Load: 58.0 t ADT: 6,918

BAKER ROAD

Good

Over: GREAT MIAMI RIVER

.13 M. N. PENCE, Shelby, OH

Built 1987 Load: 13.3 t ADT: 797

VAN DEMARK ROAD

Good

Over: GREAT MIAMI RIVER

.02 M.N. RIVER ROAD, Shelby, OH

Built 1980 Load: 13.3 t ADT: 1,652

SR-705

Good

Over: TURTLE CREEK

2.43MI.W.OF JCT. SR-29, Shelby, OH

Built 1991 Load: 18.5 t ADT: 1,136

CR-132

Good

Over: IR 75

1.02MI.N.OF MIAMI CO.LINE, Shelby, OH

Built 1959 Load: 18.8 t ADT: 104

TR-15

Good

Over: IR 75

2.55MI. N. OF JCT. SR-29, Shelby, OH

Built 1962 Load: 19.4 t ADT: 122

TR-57

Good

Over: IR 75

1MI. S OF JCT SR-119, Shelby, OH

Built 1962 Load: 19.4 t ADT: 634

CR-52

Good

Over: IR 75

1MI.S.OF JCT. SR-274, Shelby, OH

Built 1962 Load: 19.4 t ADT: 176

CR 25A

Good

Over: GREAT MIAMI RIVER

0.5 M. N. MCCLOSKEY SCHOO, Shelby, OH

Built 1999 Load: 19.8 t ADT: 2,552

RIVER ROAD

Good

Over: GREAT MIAMI RIVER

.07 M. N. SULPHUR HEIGHTS, Shelby, OH

Built 2007 Load: 20.7 t ADT: 360

SR-589

Good

Over: LEATHERWOOD CREEK

1.62MI.N.OF MIAMI CO.LINE, Shelby, OH

Built 1968 Load: 22.0 t ADT: 547

CR-27

Good

Over: IR 75

2.4MI. S. OF JCT. SR-119, Shelby, OH

Built 1962 Load: 22.7 t ADT: 586

SR 589

Good

Over: MOSQUITO CREEK

.34MI.S.OF JCT. SR-29, Shelby, OH

Built 1967 Load: 24.0 t ADT: 547

PARK ROAD

Good

Over: TAWAWA CREEK

.2 Mi N of Tawawa Dr, Shelby, OH

Built 1966 Load: 24.6 t ADT: 100

SR-65

Good

Over: JACKSON CENTER DITCH

1.33MI.N.OF JCT. SR-274, Shelby, OH

Built 1961 Load: 25.3 t ADT: 1,614

SR-47

Good

Over: PAINTER CREEK

1.67MI.E.OF JCT. SR-66, Shelby, OH

Built 1967 Load: 25.9 t ADT: 4,009

IR-75

Good

Over: GREAT MIAMI RIVER

2.35MI. N. MIAMI CO.LINE, Shelby, OH

Built 2005 Load: 25.9 t ADT: 46,838

IR-75

Good

Over: TR 135 VANDEMARK ROAD

2.94MI.S.OF JCT. SR-47, Shelby, OH

Built 1960 Load: 25.9 t ADT: 23,419

CR-29

Good

Over: IR 75

1MI. N. OF JCT. SR-274, Shelby, OH

Built 1962 Load: 25.9 t ADT: 238

SR-274

Good

Over: LORAMIE CREEK

1.86MI.W.OF JCT. IR-75, Shelby, OH

Built 1961 Load: 25.9 t ADT: 2,446

CARDO ROAD

Good

Over: LORAMIE CREEK

.78 M.W. SR. 66, Shelby, OH

Built 1980 Load: 26.9 t ADT: 286

IR-75

Good

Over: TR 39 KIRKWOOD ROAD

1.52MI.N.OF MIAMI CO.LINE, Shelby, OH

Built 1960 Load: 27.2 t ADT: 23,419

TAWAWA MAPLEWOOD

Good

Over: ZORN DITCH

0.07 MI. S. WILDERMUTH RD, Shelby, OH

Built 1992 Load: 27.9 t ADT: 273

RIVER ROAD

Good

Over: BRUSH CREEK

.27 M. S. VANDEMARK, Shelby, OH

Built 1975 Load: 27.9 t ADT: 1,457

HARDIN WAPAKONETA

Good

Over: TURTLE CREEK BRANCH

0.22 M. N. CISCO, Shelby, OH

Built 1970 Load: 28.2 t ADT: 798

BLANKE ROAD

Good

Over: MEYERHOLTZ KETTLER DITCH

0.32 MI W/JCT CR#44, Shelby, OH

Built 1991 Load: 28.8 t ADT: 224

SR-29

Good

Over: IR-75

JCT. IR-75, Shelby, OH

Built 1961 Load: 29.2 t ADT: 7,214

SR-29

Good

Over: GREAT MIAMI RIVER

.33MI. SE. OF JCT. SR-47, Shelby, OH

Built 1988 Load: 29.2 t ADT: 8,109

IR-75

Good

Over: PLUM CREEK

2.98MI. S. OF SR-119, Shelby, OH

Built 1962 Load: 29.2 t ADT: 18,042

CR-43

Good

Over: IR 75

1.04MI.N.OF JCT. SR-119, Shelby, OH

Built 1962 Load: 29.2 t ADT: 284

KUTHER ROAD

Good

Over: DUNSON DITCH

.03 M.N. CISCO ROAD, Shelby, OH

Built 1998 Load: 29.5 t ADT: 1,183

HOLTHAUS ROAD

Good

Over: SPRINGCREEK DITCH

0.1 N. OF SR 705, Shelby, OH

Built 1991 Load: 29.8 t ADT: 10

WHITEFEATHER TRL

Good

Over: WHITE FEATHER DITCH

0.17 MI. S. OF SR119, Shelby, OH

Built 2002 Load: 30.1 t ADT: 585

MASON ROAD

Good

Over: PLUM CREEK

.22 M.E. CR.25A, Shelby, OH

Built 1960 Load: 30.8 t ADT: 1,104

SR-29

Good

Over: TAWAWA CREEK

.17MI. W. OF JCT. SR-706, Shelby, OH

Built 1932 Load: 31.8 t ADT: 4,187

SR-47

Good

Over: IR 75

JCT. IR-75, Shelby, OH

Built 1961 Load: 32.4 t ADT: 22,694

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.