County profile · official public datasets

Warren County, IN

135 public highway bridges tracked in the FHWA National Bridge Inventory: 29.6% rated Good, 63.7% Fair, 6.7% Poor.

135
Public bridges: 29.6%
Good condition: 6.7%
Poor condition

The verdict

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

Warren 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.

67th
of 92 on Poor share: 6.7%
Poor-condition share: 135
public highway bridges: 1970
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.

Warren County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Warren County ranks #67 of 92 Indiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.7%). Warren County, Indiana contains 135 public highway bridges. Roughly 29.6% are rated “Good,” 63.7% “Fair,” and 6.7% “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

135

Public highway bridges in Warren County

Good condition

29.6%

40 of 135 rated 7-9

Fair condition

63.7%

86 of 135 rated 5-6

Poor condition

6.7%

9 of 135 rated 4 or below

In-state Poor-share rank

#67 of 92

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

Condition distribution

Share of 135 NBI-tracked bridges by lowest applicable component rating.

Good

29.6% (40)

Fair

63.7% (86)

Poor

6.7% (9)

Warren County's Poor-condition bridges carry 1,090 vehicle crossings a day

That is 0.9% of the county's reported daily bridge traffic on 6.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 121 crossings a day against 887 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 135 of 135 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

42.2% of Warren County's bridges have passed the 50-year mark

57 of the 135 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 29.6% 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 27.5% of the county's Poor-condition bridge traffic

CR 300N over JORDAN CREEK, built 1953, carries 300 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 9-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,090 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

5
1900s

3
1910s

6
1920s

4
1930s

7
1940s

1
1950s

7
1960s

18
1970s

32
1980s

16
1990s

18
2000s

11
2010s

6
2020s

1

What this shows Construction peaked in the 1970s, when 32 of the county's bridges still in the inventory were built, which is 23.7% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1970, 8 years older than the Indiana average of 1978.

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

The 5 Indiana counties nearest Warren County in number of bridges, with their condition splits. Its 6.7% Poor share is the 3rd-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1974 is in line with the group.

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

Bridge inventory size and condition shares for Warren County and the 5 Indiana counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Dearborn County	145	35.9%	51.7%	12.4%	1974
Orange County	137	36.5%	53.3%	10.2%	1971
Steuben County	135	48.9%	48.9%	2.2%	1970
Warren County (this page)	135	29.6%	63.7%	6.7%	1970
Harrison County	127	37.8%	59.8%	2.4%	1982
Vermillion County	127	26.8%	65.4%	7.9%	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 Warren 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 Warren County, both outside Indiana so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside IN (135 bridges here).

Nevada County, CA · 135 bridges
Meriwether County, GA · 135 bridges
Boone County, IA · 135 bridges
Palo Alto County, IA · 135 bridges

Similar average build year

Nearest mean year-built outside IN (1970 here).

Hamilton County, OH · avg 1970 · 783 bridges
Yavapai County, AZ · avg 1970 · 543 bridges
Garfield County, OK · avg 1970 · 504 bridges
San Luis Obispo County, CA · avg 1970 · 401 bridges

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

All 135 Good 40 Fair 86 Poor 9

All bridges (135)

Sort:

Warren County Bridge Snapshot

Condition distribution

Warren County's Poor-condition bridges carry 1,090 vehicle crossings a day

42.2% of Warren County's bridges have passed the 50-year mark

One structure carries 27.5% of the county's Poor-condition bridge traffic

How Warren 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 (135)

CR 450N

CR 100E

CR 575S

US 136

BRISCOE STATION RD

Kickapoo Rd

SR 26

CR 550W

SR 28

CR 900W

CR 650N

Shanklin Hill Rd

Browns Hill Rd

CR 450N

CR 25E

CR 100S

CR 800W

Possum Run Rd

Coal Hollow Rd

CR 100N

Independence Rd

SR 63 NB

SR 63 SB

E MONROE ST

US 41 NB

US 41 SB

SR 63 SB

SR 26

SR 263

SR 63 NB

SR 63 SB

SR 28

US 41 SB

CR 800E

CR 250N

Pot Holes Rd

STATE LINE ROAD

STATE LINE ROAD

CR 400S

CR 550N

CR 800W

RAILROAD STREET

CR 550W

Coal Hollow Rd

SR 263

CR 1200E

SR 28

SR 63 SB

Rainsville Road

ARMSTRONG CHAPEL R

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