County profile · official public datasets

Harrison County, IN

127 public highway bridges tracked in the FHWA National Bridge Inventory: 37.8% rated Good, 59.8% Fair, 2.4% Poor.

127
Public bridges: 37.8%
Good condition: 2.4%
Poor condition

The verdict

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

Harrison County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 22%
lowest Poor share in state: 2.4%
Poor-condition share: 127
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.

Harrison County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Harrison County ranks #20 of 92 Indiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.4%). Harrison County, Indiana contains 127 public highway bridges. Roughly 37.8% are rated “Good,” 59.8% “Fair,” and 2.4% “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.

Total bridges

127

Public highway bridges in Harrison County

Good condition

37.8%

48 of 127 rated 7-9

Fair condition

59.8%

76 of 127 rated 5-6

Poor condition

2.4%

3 of 127 rated 4 or below

In-state Poor-share rank

#20 of 92

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

Condition distribution

Share of 127 NBI-tracked bridges by lowest applicable component rating.

Good

37.8% (48)

Fair

59.8% (76)

Poor

2.4% (3)

Harrison County's Poor-condition bridges carry 7,007 vehicle crossings a day

That is 2.3% of the county's reported daily bridge traffic on 2.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,336 crossings a day against 1,454 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 127 of 127 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

37% of Harrison County's bridges have passed the 50-year mark

47 of the 127 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 37.8% 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 86.9% of the county's Poor-condition bridge traffic

OLD SR 337 over LITTLE INDIAN CREEK, built 1984, carries 6,087 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 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 7,007 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

1
1930s

5
1940s

1
1950s

6
1960s

12
1970s

24
1980s

25
1990s

29
2000s

18
2010s

3
2020s

2

What this shows Construction peaked in the 1990s, when 29 of the county's bridges still in the inventory were built, which is 22.8% 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 Harrison County compares with Indiana's closest counties by inventory size

The 5 Indiana counties nearest Harrison County in number of bridges, with their condition splits. Its 2.4% Poor share is the 2nd-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1972 is 10 years newer.

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

Bridge inventory size and condition shares for Harrison County and the 5 Indiana counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Steuben County	135	48.9%	48.9%	2.2%	1970
Warren County	135	29.6%	63.7%	6.7%	1970
Vermillion County	127	26.8%	65.4%	7.9%	1973
Harrison County (this page)	127	37.8%	59.8%	2.4%	1982
Crawford County	123	34.1%	48.8%	17.1%	1964
Scott County	118	47.5%	46.6%	5.9%	1982

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

Similar inventory size

Nearest county inventories outside IN (127 bridges here).

Yuba County, CA · 127 bridges
Jefferson County, ID · 127 bridges
Knox County, KY · 127 bridges
Union County, KY · 127 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 127 Good 48 Fair 76 Poor 3

Good-condition bridges (48)

Sort:

Harrison County Bridge Snapshot

Condition distribution

Harrison County's Poor-condition bridges carry 7,007 vehicle crossings a day

37% of Harrison County's bridges have passed the 50-year mark

One structure carries 86.9% of the county's Poor-condition bridge traffic

How Harrison 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

Good-condition bridges (48)

PUMPING STATION RD

SR 337

MATHIS RD

BUCK CR RIDGE RD

BLUE SPRINGS RD

COOKS MILL RD

PARK DR

OWANS LN

MOTTS RD

RIVER RD

TURLEY RD

GRAVEL CREEK RD

VALLEY VIEW RD

BIG INDIAN RD

CRANDALL-LANESVL R

MCPHILLIPS RD

OLD DAM 43 RD

MOSQUITO CREEK RD

SANDY BRANCH RD

WALNUT VALLEY RD

CIRCLE RD

PINE HILL DR

DEATRICKS RD

ZOLLMAN RD

ROSEWOOD ROAD

SR 335

I-64 WB

ROGERS CAMPGRND RD

SOUTH ST LOUIS RD

EAST OLD GOSHEN RD

ANGEL RUN RD

SR 335

I-64 EB

SR 11

SEVEN SPRINGS RD

SR 335

APPLE LN

ST PETERS CHURCH R

PETE SCHNICKEL WAY

KINGS LN

NEW MIDDLETOWN RD

REHOBETH RD

HARRISON SPRING RD

PONDEROSA RD

CRANDALL BRANCH RD

BLACK CHAPEL RD

TEE RD

SR 111

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