Total bridges
124
Public highway bridges in Park County
County profile · official public datasets
Park County, MT
124 public highway bridges tracked in the FHWA National Bridge Inventory: 21% rated Good, 68.5% Fair, 10.5% Poor.
- 124
- Public bridges
- 21%
- Good condition
- 10.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Park County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 46th
- of 56 on Poor share
- 10.5%
- Poor-condition share
- 124
- public highway bridges
- 1976
- 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.
Park County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Park County ranks #46 of 56 Montana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 10.5%). Park County, Montana contains 124 public highway bridges. Roughly 21% are rated “Good,” 68.5% “Fair,” and 10.5% “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
21%
26 of 124 rated 7-9
Fair condition
68.5%
85 of 124 rated 5-6
Poor condition
10.5%
13 of 124 rated 4 or below
In-state Poor-share rank
#46 of 56
Among Montana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 124 NBI-tracked bridges by lowest applicable component rating.
Good 21% (26)
Fair 68.5% (85)
Poor 10.5% (13)
Park County's Poor-condition bridges carry 3,915 vehicle crossings a day
That is 1.9% of the county's reported daily bridge traffic on 10.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 301 crossings a day against 772 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 124 of 124 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
47.6% of Park County's bridges have passed the 50-year mark
59 of the 124 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 21% 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 72.8% of the county's Poor-condition bridge traffic
US 89 over INT EAST LIVINGSTON I 90, built 1962, carries 2,850 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 13-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 3,915 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Park County's bridges were built
124 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 2
1910–1919
2 bridges
- 1920s 4
1920–1929
4 bridges
- 1930s
1930–1939
9 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s
1950–1959
12 bridges
- 1960s
1960–1969
16 bridges
- 1970s
1970–1979
21 bridges
- 1980s
1980–1989
22 bridges
- 1990s 4
1990–1999
4 bridges
- 2000s
2000–2009
13 bridges
- 2010s
2010–2019
12 bridges
- 2020s 5
2020–2029
5 bridges
What this shows Construction peaked in the 1980s, when 22 of the county's bridges still in the inventory were built, which is 17.7% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1976) matches the Montana average (1977).
How Park County compares with Montana's closest counties by inventory size
The 5 Montana counties nearest Park County in number of bridges, with their condition splits. Its 10.5% Poor share is the 5th-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1980 is in line with the group.
Showing the 5 closest of 55 Montana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Big Horn County | 135 | 26.7% | 68.1% | 5.2% | 1978 |
| Jefferson County | 134 | 17.9% | 76.9% | 5.2% | 1977 |
| Park County (this page) | 124 | 21% | 68.5% | 10.5% | 1976 |
| Sanders County | 120 | 40% | 52.5% | 7.5% | 1979 |
| Lake County | 117 | 57.3% | 27.4% | 15.4% | 1995 |
| Rosebud County | 114 | 18.4% | 76.3% | 5.3% | 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 Park 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 Park County, both outside Montana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MT (124 bridges here).
- Bannock County, ID · 124 bridges
- Breathitt County, KY · 124 bridges
- Caldwell County, LA · 124 bridges
- St. Mary County, LA · 124 bridges
Similar average build year
Nearest mean year-built outside MT (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (124)
MAIN BOULDER ROAD
FairOver: BOULDER RIVER
40M SOUTH OF SPRINGDALE, Park, MT
Built 1940 ADT: 156
LULU PASS TRAIL RD
FairOver: POLAR STAR CREEK
6 M NE COOKE CITY, Park, MT
Built 2002 ADT: 100
COAL CAMP RD
FairOver: SHIELDS RIVER 015
8M NE WILSALL, Park, MT
Built 1975 Load: 5.4 t ADT: 100
INDIAN CREEK RD
FairOver: SHIELDS RIVER 027
2M S WILSALL, Park, MT
Built 1920 Load: 5.4 t ADT: 100
COTTONWOOD BENCH R
FairOver: COTTONWOOD CREEK 030
10M S WILSALL, Park, MT
Built 1908 Load: 5.4 t ADT: 100
HORSE CR RD
FairOver: SHIELDS RIVER 021
E WILSALL-HORSE CR RD, Park, MT
Built 1986 Load: 6.4 t ADT: 100
HORSE CR RD
FairOver: FLATHEAD CREEK 020
WILSALL-HORSE CR RD, Park, MT
Built 1912 Load: 7.3 t ADT: 100
CANYON CREEK RD
FairOver: BRACKETT CREEK 006
2M SW CLYDE PARK, Park, MT
Built 1975 Load: 8.2 t ADT: 100
LOWER COTTONWOOD R
FairOver: COTTONWOOD CREEK 028
5M NE CLYDE PARK, Park, MT
Built 1968 Load: 10.0 t ADT: 100
CASTLE MOUNTAIN RD
FairOver: BRACKETT CREEK 032
2M S CLYDE PARK, Park, MT
Built 1970 Load: 14.5 t ADT: 100
HAMILTON ROAD
FairOver: SMITH CREEK
15M NE WILSALL, Park, MT
Built 2012 Load: 14.5 t ADT: 100
COTTONWOOD CRK. RD
FairOver: TRESPASS CREEK
NO DATA ENTERED, Park, MT
Built 1970 Load: 14.9 t ADT: 50
SHIELDS RIVER RD
FairOver: SHIELDS RIVER 010
4M NE WILSALL, Park, MT
Built 1955 Load: 15.4 t ADT: 100
SECOND ST S-US 89
FairOver: YELLOWSTONE RIVER
GARDINER-SECOND ST S, Park, MT
Built 1930 Load: 16.3 t ADT: 4,728
NO DATA ENTERED
FairOver: CEDAR CREEK
NO DATA ENTERED, Park, MT
Built 1999 Load: 18.8 t ADT: 50
US 89
FairOver: BIG CREEK
7M SW EMIGRANT, Park, MT
Built 1960 Load: 19.1 t ADT: 1,547
I 90
FairOver: MISSION CREEK
9.9M E LIVINGSTON, Park, MT
Built 1987 Load: 20.0 t ADT: 5,692
US 89
FairOver: YELLOWSTONE RIVER
6M NE LIVINGSTON, Park, MT
Built 1955 Load: 20.0 t ADT: 2,146
SHIELDS RIVER RD
FairOver: FLATHEAD CREEK 009
NE WILSALL, Park, MT
Built 1955 Load: 20.9 t ADT: 100
US 89
FairOver: RR
5M NE LIVINGSTON, Park, MT
Built 1955 Load: 20.9 t ADT: 2,146
MURPHYS LN
FairOver: YELLOWSTONE RIVER 004
E EMIGRANT, Park, MT
Built 1949 Load: 21.8 t ADT: 1,444
MILL CREEK RD
FairOver: MILL CREEK 044
5M E EMIGRANT, Park, MT
Built 1972 Load: 22.7 t ADT: 242
S 540-E RIVER RD
FairOver: MILL CREEK
2M NE PRAY, Park, MT
Built 1925 Load: 22.7 t ADT: 892
PINE CREEK RD
FairOver: YELLOWSTONE RIVER 069
1M W PINE CREEK, Park, MT
Built 1990 Load: 23.6 t ADT: 360
OLD CLYDE PARK RD
FairOver: FERRY CREEK 037
2M NE LIVINGSTON, Park, MT
Built 1938 Load: 24.4 t ADT: 673
BRACKETT CREEK RD
FairOver: SHIELDS RIVER 007
W CLYDE PARK, Park, MT
Built 1980 Load: 24.5 t ADT: 273
MAIN BOULDER RD
FairOver: BOULDER RIVER 040
31M S SPRINGDALE, Park, MT
Built 1938 Load: 24.5 t ADT: 156
US 89
FairOver: SHIELDS RIVER
1M N CLYDE PARK, Park, MT
Built 1981 Load: 24.5 t ADT: 1,247
I 90
FairOver: INT MISSION CREEK
9.9M E LIVINGSTON, Park, MT
Built 1987 Load: 25.4 t ADT: 5,692
I 90
FairOver: INT MISSION CREEK
9.9M E LIVINGSTON, Park, MT
Built 1987 Load: 25.4 t ADT: 5,692
OLD STAGE ROAD
FairOver: YELLOWSTONE RIVER 077
1M N SPRINGDALE, Park, MT
Built 1980 Load: 25.4 t ADT: 102
DIVIDE CREEK ROAD
FairOver: TOM MINER CREEK
TOM MINER BASIN, Park, MT
Built 1976 Load: 25.6 t ADT: 50
CREVICE MNT RD
FairOver: BEAR CREEK 080
JARDINE, Park, MT
Built 2009 Load: 26.0 t ADT: 100
US 89
FairOver: KAY CREEK
6M SE CLYDE PARK, Park, MT
Built 1984 Load: 26.3 t ADT: 1,430
US 89
FairOver: YELLOWSTONE RIVER
11M SW EMIGRANT, Park, MT
Built 1958 Load: 27.2 t ADT: 1,547
SHIELDS RIVER RD
FairOver: SHIELDS RIVER 011
14M NE WILSALL, Park, MT
Built 1957 Load: 28.1 t ADT: 100
FRONTAGE RD E 448
FairOver: COUNTY ROAD 008
10M E LIVINGSTON, Park, MT
Built 1987 Load: 28.1 t ADT: 70
US 89
FairOver: SHIELDS RIVER
4M SE CLYDE PARK, Park, MT
Built 1984 Load: 28.1 t ADT: 1,430
I 90
FairOver: INT HOPPER
8.7M W LIVINGSTON, Park, MT
Built 1978 Load: 29.0 t ADT: 4,841
I 90
FairOver: INT HOPPER
8.7M W LIVINGSTON, Park, MT
Built 1978 Load: 29.0 t ADT: 8,130
I 90
FairOver: YELLOWSTONE RIVER
LIVINGSTON, Park, MT
Built 1962 Load: 29.0 t ADT: 6,211
I 90
FairOver: YELLOWSTONE RIVER
LIVINGSTON, Park, MT
Built 1962 Load: 29.0 t ADT: 6,211
E RIVER RD
FairOver: YELLOWSTONE RIVER 043
3M NE PRAY, Park, MT
Built 1960 Load: 29.0 t ADT: 242
US 89
FairOver: ROCK CREEK
2M SE CLYDE PARK, Park, MT
Built 1984 Load: 29.0 t ADT: 1,430
W.FK.MILL CR. RD.
FairOver: W.FORK MILL CREEK
S. OF LIVINGSTON, Park, MT
Built 1971 Load: 29.8 t ADT: 50
MAIN BOULDER RD
FairOver: FOUR MILE CREEK 039
30M S SPRINGDALE, Park, MT
Built 1938 Load: 29.9 t ADT: 156
I 90
FairOver: OREA CREEK ROAD
5M W LIVINGSTON, Park, MT
Built 1977 Load: 30.8 t ADT: 8,130
I 90
FairOver: OREA CREEK ROAD
5M W LIVINGSTON, Park, MT
Built 1977 Load: 30.8 t ADT: 8,130
NF 132-BIG CREEK R
FairOver: BIG CREEK 063
11M SW EMIGRANT, Park, MT
Built 1997 Load: 30.8 t ADT: 100
W.FORK MILL CR.RD.
FairOver: W.FORK MILL CREEK
S. OF LIVINGSTON, Park, MT
Built 1971 Load: 31.4 t ADT: 50
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.