Total bridges
145
Public highway bridges in Dearborn County
County profile · official public datasets
Dearborn County, IN
145 public highway bridges tracked in the FHWA National Bridge Inventory: 35.9% rated Good, 51.7% Fair, 12.4% Poor.
- 145
- Public bridges
- 35.9%
- Good condition
- 12.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Dearborn County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 88th
- of 92 on Poor share
- 12.4%
- Poor-condition share
- 145
- public highway bridges
- 1974
- 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.
Dearborn County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Dearborn County ranks #88 of 92 Indiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.4%). Dearborn County, Indiana contains 145 public highway bridges. Roughly 35.9% are rated “Good,” 51.7% “Fair,” and 12.4% “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
35.9%
52 of 145 rated 7-9
Fair condition
51.7%
75 of 145 rated 5-6
Poor condition
12.4%
18 of 145 rated 4 or below
In-state Poor-share rank
#88 of 92
Among Indiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 145 NBI-tracked bridges by lowest applicable component rating.
Good 35.9% (52)
Fair 51.7% (75)
Poor 12.4% (18)
Dearborn County's Poor-condition bridges carry 11,142 vehicle crossings a day
That is 1.8% of the county's reported daily bridge traffic on 12.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 619 crossings a day against 5,266 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 145 of 145 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
44.8% of Dearborn County's bridges have passed the 50-year mark
65 of the 145 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 35.9% 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 37.2% of the county's Poor-condition bridge traffic
SR 46 over WHITEWATER RIVER, built 1937, carries 4,142 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 18-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 11,142 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Dearborn County's bridges were built
145 bridges with a recorded construction year, grouped by decade
- pre-1900 3
Built before 1900
3 bridges
- 1910s 4
1910–1919
4 bridges
- 1920s 4
1920–1929
4 bridges
- 1930s
1930–1939
15 bridges
- 1940s 8
1940–1949
8 bridges
- 1950s 6
1950–1959
6 bridges
- 1960s
1960–1969
21 bridges
- 1970s
1970–1979
12 bridges
- 1980s
1980–1989
21 bridges
- 1990s
1990–1999
19 bridges
- 2000s 8
2000–2009
8 bridges
- 2010s
2010–2019
15 bridges
- 2020s
2020–2029
9 bridges
What this shows Construction peaked in the 1960s, when 21 of the county's bridges still in the inventory were built, which is 14.5% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1974) matches the Indiana average (1978).
How Dearborn County compares with Indiana's closest counties by inventory size
The 5 Indiana counties nearest Dearborn County in number of bridges, with their condition splits. Its 12.4% Poor share is the 6th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1979 is 5 years older.
Showing the 5 closest of 91 Indiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Benton County | 151 | 45.7% | 52.3% | 2% | 1986 |
| Perry County | 151 | 41.1% | 57% | 2% | 1978 |
| Owen County | 150 | 38.7% | 51.3% | 10% | 1978 |
| DeKalb County | 149 | 40.9% | 59.1% | 0% | 1980 |
| Floyd County | 145 | 34.5% | 60.7% | 4.8% | 1974 |
| Dearborn County (this page) | 145 | 35.9% | 51.7% | 12.4% | 1974 |
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 Dearborn 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 Dearborn County, both outside Indiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IN (145 bridges here).
- McDonald County, MO · 145 bridges
- Lenoir County, NC · 145 bridges
- Washington County, RI · 145 bridges
- Monroe County, TN · 145 bridges
Similar average build year
Nearest mean year-built outside IN (1974 here).
- Knox County, TN · avg 1974 · 588 bridges
- Summit County, OH · avg 1974 · 563 bridges
- Onondaga County, NY · avg 1974 · 472 bridges
- Orange County, NY · avg 1974 · 472 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (75)
CO PARK ENTRANCE
FairOver: BRANCH OF TANNERS CREEK
00.03 SW OF SR 1, Dearborn, IN
Built 1879 Load: 2.9 t ADT: 30
BRUSH FORK RD
FairOver: BRUSH FORK TANNERS CREEK
01.50 N OF SAWDON RIDGE, Dearborn, IN
Built 1999 Load: 4.5 t ADT: 100
GEORGE ST
FairOver: HOGAN CREEK
00.10 N OF SR 56, Dearborn, IN
Built 1887 Load: 8.1 t ADT: 3,050
N DEARBORN RD
FairOver: E FORK TANNERS CREEK
01.80 E YORK RIDGE, Dearborn, IN
Built 1989 Load: 12.7 t ADT: 1,410
COLE LN
FairOver: LAUGHERY CREEK
02.30 S US 50, Dearborn, IN
Built 1998 Load: 17.8 t ADT: 2,320
LAWRENCEVILLE RD
FairOver: EAST FORK TANNERS CREEK
00.30 N OF GUTAPFEL RD, Dearborn, IN
Built 1930 Load: 18.3 t ADT: 1,260
BELLS BRANCH RD
FairOver: LAUGHERY CREEK
00.50 S OF CLAY MILLER, Dearborn, IN
Built 1916 Load: 18.7 t ADT: 100
HYLAND RD
FairOver: ENNIS CREEK
00.30 W OF SR 1, Dearborn, IN
Built 1910 Load: 20.0 t ADT: 110
E LAUGHERY CR RD
FairOver: BRANCH OF LAUGHERY CREEK
00.50 W OF GATCH HILL, Dearborn, IN
Built 1935 Load: 20.5 t ADT: 140
ST PETERS RD
FairOver: EAST FORK TANNERS CREEK
00.20 N OF SR 46, Dearborn, IN
Built 1940 Load: 22.2 t ADT: 1,570
LAUGHERY CREEK RD
FairOver: MUD LICK CREEK
00.40 W OF ARLINGTON RD, Dearborn, IN
Built 1925 Load: 24.1 t ADT: 90
SR 350
FairOver: SOUTH HOGAN CREEK
00.10 W US 50, Dearborn, IN
Built 1981 Load: 24.3 t ADT: 10,240
STAT. HOLLOW RD
FairOver: SOUTH HOGAN CREEK
00.60 N OF US 50, Dearborn, IN
Built 1895 Load: 24.5 t ADT: 230
SCHWIPPS RD
FairOver: NORTH HOGAN CREEK
00.40 W OF HOGAN RD, Dearborn, IN
Built 2005 Load: 26.1 t ADT: 90
US 50
FairOver: CSX RR & 2 STREETS
01.05 W SR 56/350, Dearborn, IN
Built 1962 Load: 26.9 t ADT: 21,622
JOHNSON FORK RD
FairOver: JOHNSON FORK CREEK
00.70 N I-74, Dearborn, IN
Built 1970 Load: 26.9 t ADT: 2,260
PLATT RD
FairOver: ZIEGLER CREEK
00.20 S OF KONRADI RD, Dearborn, IN
Built 1992 Load: 27.1 t ADT: 100
SALT FORK RD
FairOver: CAMP GROUND BRANCH
00.10 S OF JACKSON RIDGE, Dearborn, IN
Built 1978 Load: 27.5 t ADT: 2,050
W LAUGHERY CR RD
FairOver: BAUM HOLLOW CREEK
00.10 S OF BAUM HOLLOW, Dearborn, IN
Built 2004 Load: 28.0 t ADT: 100
ST PETERS ROAD
FairOver: I-74
03.27 E SR 101, Dearborn, IN
Built 1962 Load: 28.2 t ADT: 1,120
I-275
FairOver: OHIO RIVER CSX RR CR
00.00 OHIO RIVER, Dearborn, IN
Built 1976 Load: 29.4 t ADT: 40,222
US 50
FairOver: HOGAN CREEK
00.09 E SR 56, Dearborn, IN
Built 1952 Load: 29.5 t ADT: 28,398
ASCHE RD
FairOver: N HOGAN CREEK
00.20 E OF TANGMAN, Dearborn, IN
Built 1988 Load: 31.7 t ADT: 420
JOHNSON FORK RD
FairOver: JOHNSON FORT CREEK
01.40 N I-74, Dearborn, IN
Built 1967 Load: 31.7 t ADT: 2,260
SR 46
FairOver: LOGAN CREEK
00.94 E SR 1, Dearborn, IN
Built 1937 Load: 32.7 t ADT: 1,242
SR 46
FairOver: LOGAN CREEK
02.93 E SR 1, Dearborn, IN
Built 1937 Load: 32.7 t ADT: 1,810
HUESMAN RD
FairOver: BRANCH OF LAUGHERY CREEK
00.60 S OF MT TABOR RD, Dearborn, IN
Built 1992 Load: 32.7 t ADT: 860
E LAUGHERY CR RD
FairOver: BRANCH OF LAUGHERY CREEK
00.40 W OF SR 56, Dearborn, IN
Built 1993 Load: 32.7 t ADT: 100
SPANGLER RD
FairOver: PETER CREEK
00.80 SE OF STOOPS RD, Dearborn, IN
Built 1920 Load: 32.7 t ADT: 320
SANGAMAW RD
FairOver: HAYNES BRANCH
00.60 W OF SR 62, Dearborn, IN
Built 1976 Load: 32.7 t ADT: 480
CUTTER RD
FairOver: BRANCH OF LAUGHERY CREEK
01.20 SW OF BELLS BR., Dearborn, IN
Built 2004 Load: 32.7 t ADT: 100
BELLS BRANCH RD
FairOver: BAUM HOLLOW CREEK
00.30 N OF CLAY MILLER, Dearborn, IN
Built 1945 Load: 32.7 t ADT: 110
COUNTY FARM RD
FairOver: LITTLE HOGAN CREEK
01.70 W SR 48, Dearborn, IN
Built 1990 Load: 32.7 t ADT: 500
ESTER RIDGE RD
FairOver: WEST FORK OF TANNERS CR
01.10 S OF GIEGER RD, Dearborn, IN
Built 1991 Load: 32.7 t ADT: 100
BONNELL RD
FairOver: FOX RUN
00.10 W OF FOX RD, Dearborn, IN
Built 1988 Load: 32.7 t ADT: 160
SAWDON RIDGE RD
FairOver: BRUSH FORK TANNERS CREEK
00.20 NE OF SR 1, Dearborn, IN
Built 1987 Load: 32.7 t ADT: 800
COOK RD
FairOver: SLAB CAMP CREEK
00.20 W OF SR 1, Dearborn, IN
Built 1996 Load: 32.7 t ADT: 30
ENNIS RIDGE RD
FairOver: ENNIS CREEK
00.60 W OF SR 1, Dearborn, IN
Built 1989 Load: 32.7 t ADT: 110
PINHOOK RD
FairOver: BRANCH OF WHITEWATER RVR
00.60 E OF WHITES HILL, Dearborn, IN
Built 1986 Load: 32.7 t ADT: 380
BURNS RD
FairOver: NORTH HOGAN CREEK
00.30 NW OF SR 48, Dearborn, IN
Built 1920 Load: 32.7 t ADT: 100
WILSON CREEK RD
FairOver: WILSON CREEK
00.20 N OF WILSON CREEK, Dearborn, IN
Built 1978 Load: 32.7 t ADT: 4,200
HARRISN BRKVILL RD
FairOver: KOLB CREEK
00.40 S OF MCQUEEN RD, Dearborn, IN
Built 1950 Load: 32.7 t ADT: 9,690
W LAUGHERY CR RD
FairOver: BOYD BRANCH
00.01 S OF ROBERTS RD, Dearborn, IN
Built 2001 Load: 32.7 t ADT: 100
ARLINGTON RD
FairOver: MUD LICK CREEK
00.10 NW OF LAUGHERY CR, Dearborn, IN
Built 1985 Load: 32.7 t ADT: 390
CROSS RD
FairOver: BRANCH OF HOGAN CREEK
00.01 W OF GOOSE RUN RD, Dearborn, IN
Built 1960 Load: 32.7 t ADT: 90
PRUSS RD
FairOver: BOYD BRANCH
00.50 N OF SR 62, Dearborn, IN
Built 2000 Load: 32.7 t ADT: 100
LONG BRANCH RD
FairOver: LONG BRANCH
01.00 NW OF S HOGAN RD, Dearborn, IN
Built 1980 Load: 32.7 t ADT: 240
KONRADI RD
FairOver: WEST FORK OF TANNERS CR
00.10 S OF BONNELL RD, Dearborn, IN
Built 1999 Load: 32.9 t ADT: 100
WILSON CREEK RD
FairOver: WILSON CREEK
01.10 N OF US 50, Dearborn, IN
Built 1984 Load: 33.0 t ADT: 4,030
CHESTERVILLE RD
FairOver: ALLEN BRANCH
00.10 W OF STITTS HILL, Dearborn, IN
Built 2009 Load: 33.4 t ADT: 410
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.