County profile · official public datasets

Indiana County, PA

301 public highway bridges tracked in the FHWA National Bridge Inventory: 29.9% rated Good, 51.2% Fair, 18.9% Poor.

301
Public bridges: 29.9%
Good condition: 18.9%
Poor condition

The verdict

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

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

60th
of 67 on Poor share: 18.9%
Poor-condition share: 301
public highway bridges: 1972
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.

Indiana County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Indiana County ranks #60 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 18.9%). Indiana County, Pennsylvania contains 301 public highway bridges. Roughly 29.9% are rated “Good,” 51.2% “Fair,” and 18.9% “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

301

Public highway bridges in Indiana County

Good condition

29.9%

90 of 301 rated 7-9

Fair condition

51.2%

154 of 301 rated 5-6

Poor condition

18.9%

57 of 301 rated 4 or below

In-state Poor-share rank

#60 of 67

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

Condition distribution

Share of 301 NBI-tracked bridges by lowest applicable component rating.

Good

29.9% (90)

Fair

51.2% (154)

Poor

18.9% (57)

Indiana County's Poor-condition bridges carry 76,651 vehicle crossings a day

That is 10.3% of the county's reported daily bridge traffic on 18.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,419 crossings a day against 2,539 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 298 of 301 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

54.5% of Indiana County's bridges have passed the 50-year mark

164 of the 301 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 29.9% 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 20.4% of the county's Poor-condition bridge traffic

SR0119 NB&SB over TWO LICK CREEK, built 1960, carries 15,630 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 57-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 76,651 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

3
1910s

8
1920s

12
1930s

30
1940s

14
1950s

33
1960s

38
1970s

44
1980s

22
1990s

26
2000s

21
2010s

38
2020s

12

What this shows Construction peaked in the 1970s, when 44 of the county's bridges still in the inventory were built, which is 14.6% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1972) matches the Pennsylvania average (1970).

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

The 5 Pennsylvania counties nearest Indiana County in number of bridges, with their condition splits. Its 18.9% Poor share is the 6th-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1967 is 5 years newer.

Showing the 5 closest of 66 Pennsylvania counties eligible for comparison.

Bridge inventory size and condition shares for Indiana County and the 5 Pennsylvania counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Greene County	306	37.3%	46.7%	16%	1967
Indiana County (this page)	301	29.9%	51.2%	18.9%	1972
Beaver County	299	41.1%	48.8%	10%	1972
Northumberland County	299	41.8%	51.5%	6.7%	1963
Franklin County	294	29.6%	62.2%	8.2%	1964
Clearfield County	292	38.4%	47.6%	14%	1971

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

Similar inventory size

Nearest county inventories outside PA (301 bridges here).

Madison County, IN · 301 bridges
Cedar County, IA · 301 bridges
Crawford County, IA · 301 bridges
Penobscot County, ME · 301 bridges

Similar average build year

Nearest mean year-built outside PA (1972 here).

Santa Clara County, CA · avg 1972 · 964 bridges
Madison County, AL · avg 1972 · 710 bridges
Kern County, CA · avg 1972 · 668 bridges
Middlesex County, NJ · avg 1972 · 563 bridges

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

All 301 Good 90 Fair 154 Poor 57

Fair-condition bridges (154)

Sort:

Indiana County Bridge Snapshot

Condition distribution

Indiana County's Poor-condition bridges carry 76,651 vehicle crossings a day

54.5% of Indiana County's bridges have passed the 50-year mark

One structure carries 20.4% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Fair-condition bridges (154)

SR0085

T-596 NEAL RD

T-974 BECKETT ROAD

T-373 FRANTZ RD

SR0085

SR0259

T-734 BRUSH CREEK

SR4006

T-362 RIDGE RD

T-476 ALLEN BRIDGE

T-612 MUSSER RD

T-488 BLUE SPRUCE

T-756 POPSON RD

T-460 AULTMAN RUN

T-436 BROWN ROAD

T-563 RAILROAD ST

T-752 LAUREL RUN

T-442 COUNTRY LANE

SR0403

SR0422 EB

SR0056

SCHOOL STREET

T-511 FRANKLIN RD

SR0110 & RAMPS L&K

SR0954

SR3056

T-494 GROFT RD

SR0286

SR0422 WB

SR3015

SR4010

T-714 HORSE THIEF

GOMPERS AVENUE

WILLOW AVENUE

SR0119

SR2027

T-633 SPRUCE GROVE

SR0259

SR0711

SR3019

SR0056

SR0119

T-539 FRYE CEMETER

SR0119 NB&SB

SR0119 NB&SB

SR0119 NB&SB

SR0119 NB&SB

SR0240

SR0259

SR0286 EB&WB

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