Total bridges
301
Public highway bridges in Indiana County
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.
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.
When Indiana County's bridges were built
301 bridges with a recorded construction year, grouped by decade
- 1900s 3
1900–1909
3 bridges
- 1910s 8
1910–1919
8 bridges
- 1920s 12
1920–1929
12 bridges
- 1930s
1930–1939
30 bridges
- 1940s 14
1940–1949
14 bridges
- 1950s
1950–1959
33 bridges
- 1960s
1960–1969
38 bridges
- 1970s
1970–1979
44 bridges
- 1980s
1980–1989
22 bridges
- 1990s
1990–1999
26 bridges
- 2000s
2000–2009
21 bridges
- 2010s
2010–2019
38 bridges
- 2020s 12
2020–2029
12 bridges
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.
| 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.
Fair-condition bridges (154)
T-833 OLSON RD
FairOver: PICKERING RUN
BTW SR119 & T681, Indiana, PA
Built 1965 Load: 99.8 t ADT: 175
LOCUST STREET
FairOver: MARSH RUN
BTW S 4TH ST & S 5TH ST, Indiana, PA
Built 1961 Load: 99.8 t ADT: 775
MAPLE STREET
FairOver: MARSH RUN
BTW S 7TH & FLEMING AVE, Indiana, PA
Built 1961 Load: 99.8 t ADT: 2,000
4TH ST & CHURCH ST
FairOver: MARSH RUN
INT OF 4TH ST & CHURCH ST, Indiana, PA
Built 1961 Load: 99.8 t ADT: 2,500
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.