County profile · official public datasets

Dubois County, IN

220 public highway bridges tracked in the FHWA National Bridge Inventory: 49.5% rated Good, 47.3% Fair, 3.2% Poor.

220
Public bridges: 49.5%
Good condition: 3.2%
Poor condition

The verdict

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

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

Top 32%
lowest Poor share in state: 3.2%
Poor-condition share: 220
public highway bridges: 1982
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.

Dubois County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Dubois County ranks #29 of 92 Indiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.2%). Dubois County, Indiana contains 220 public highway bridges. Roughly 49.5% are rated “Good,” 47.3% “Fair,” and 3.2% “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

220

Public highway bridges in Dubois County

Good condition

49.5%

109 of 220 rated 7-9

Fair condition

47.3%

104 of 220 rated 5-6

Poor condition

3.2%

7 of 220 rated 4 or below

In-state Poor-share rank

#29 of 92

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

Condition distribution

Share of 220 NBI-tracked bridges by lowest applicable component rating.

Good

49.5% (109)

Fair

47.3% (104)

Poor

3.2% (7)

Dubois County's Poor-condition bridges carry 2,142 vehicle crossings a day

That is 0.6% of the county's reported daily bridge traffic on 3.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 306 crossings a day against 1,662 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 220 of 220 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

30.5% of Dubois County's bridges have passed the 50-year mark

67 of the 220 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 49.5% 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 43.3% of the county's Poor-condition bridge traffic

DIVISION Rd over CROOKED Creek, built 1991, carries 928 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 2,142 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

2
1920s

8
1930s

8
1940s

4
1950s

5
1960s

25
1970s

26
1980s

37
1990s

60
2000s

33
2010s

9
2020s

3

What this shows Construction peaked in the 1990s, when 60 of the county's bridges still in the inventory were built, which is 27.3% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1982) matches the Indiana average (1978).

How Dubois County compares with Indiana's closest counties by inventory size

The 5 Indiana counties nearest Dubois County in number of bridges, with their condition splits. Its 3.2% Poor share is the 2nd-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1976 is 6 years newer.

Showing the 5 closest of 91 Indiana counties eligible for comparison.

Bridge inventory size and condition shares for Dubois County and the 5 Indiana counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
LaPorte County	227	33.5%	59.9%	6.6%	1972
Daviess County	221	59.3%	40.7%	0%	1993
Decatur County	220	34.5%	58.6%	6.8%	1971
Dubois County (this page)	220	49.5%	47.3%	3.2%	1982
Sullivan County	217	29.5%	65.4%	5.1%	1966
White County	214	36%	60.3%	3.7%	1978

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

Similar inventory size

Nearest county inventories outside IN (220 bridges here).

Bibb County, GA · 220 bridges
Taylor County, IA · 220 bridges
Winn County, LA · 220 bridges
Thayer County, NE · 220 bridges

Similar average build year

Nearest mean year-built outside IN (1982 here).

Oklahoma County, OK · avg 1982 · 1,216 bridges
Jackson County, MO · avg 1982 · 930 bridges
Milwaukee County, WI · avg 1982 · 893 bridges
Champaign County, IL · avg 1982 · 727 bridges

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

All 220 Good 109 Fair 104 Poor 7

All bridges (220)

Sort:

Dubois County Bridge Snapshot

Condition distribution

Dubois County's Poor-condition bridges carry 2,142 vehicle crossings a day

30.5% of Dubois County's bridges have passed the 50-year mark

One structure carries 43.3% of the county's Poor-condition bridge traffic

How Dubois County compares with Indiana's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (220)

SR 162

US 231

I-64 WB

CR 300N

CR 925E

I-64 EB

CR 1200S

SR 64

CR 400W

DUFF Rd SE

CR 230S

CR 850W

KYANA Rd

CR 200W

CR 400S

Old Rd 45

1ST AVE

CR 1050E

CUZCO RD W

CR 350S

SR 264

FERDINAND Rd NW

CR 1000S

SR 64

CUZCO NORTON Rd

SCHNELL Rd

CLAY St

CR 400N

FERDINAND Rd NW

CR 150S

SR 545

1ST ST

HILLHAM RdS

CR 1200S

SCHNELL RD

SCHNELLVILLE Rd

CR 500W

CR 1000S

CR 1100S

CR 400W

CR 75E

CR 160S

SR 56

CR 400S

CR 500N

SR 164

MARIAH HILL Rd

CR 450N

CR 175E

CR 550S

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