Total bridges
148
Public highway bridges in Ravalli County
County profile · official public datasets
Ravalli County, MT
148 public highway bridges tracked in the FHWA National Bridge Inventory: 41.2% rated Good, 53.4% Fair, 5.4% Poor.
- 148
- Public bridges
- 41.2%
- Good condition
- 5.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Ravalli County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 45%
- lowest Poor share in state
- 5.4%
- Poor-condition share
- 148
- public highway bridges
- 1981
- 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.
Ravalli County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Ravalli County ranks #25 of 56 Montana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.4%). Ravalli County, Montana contains 148 public highway bridges. Roughly 41.2% are rated “Good,” 53.4% “Fair,” and 5.4% “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.
Good condition
41.2%
61 of 148 rated 7-9
Fair condition
53.4%
79 of 148 rated 5-6
Poor condition
5.4%
8 of 148 rated 4 or below
In-state Poor-share rank
#25 of 56
Among Montana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 148 NBI-tracked bridges by lowest applicable component rating.
Good 41.2% (61)
Fair 53.4% (79)
Poor 5.4% (8)
Ravalli County's Poor-condition bridges carry 2,194 vehicle crossings a day
That is 0.7% of the county's reported daily bridge traffic on 5.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 274 crossings a day against 3,258 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 148 of 148 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
43.9% of Ravalli County's bridges have passed the 50-year mark
65 of the 148 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 41.2% 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 77.6% of the county's Poor-condition bridge traffic
SKALKAHO HWY over SKALKAHO CREEK 053, built 1941, carries 1,703 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 8-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 2,194 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Ravalli County's bridges were built
148 bridges with a recorded construction year, grouped by decade
- 1910s 3
1910–1919
3 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 10
1940–1949
10 bridges
- 1950s 10
1950–1959
10 bridges
- 1960s
1960–1969
14 bridges
- 1970s
1970–1979
33 bridges
- 1980s
1980–1989
14 bridges
- 1990s
1990–1999
16 bridges
- 2000s
2000–2009
25 bridges
- 2010s
2010–2019
18 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1970s, when 33 of the county's bridges still in the inventory were built, which is 22.3% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1981) matches the Montana average (1977).
How Ravalli County compares with Montana's closest counties by inventory size
The 5 Montana counties nearest Ravalli County in number of bridges, with their condition splits. Its 5.4% Poor share is the 3rd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1976 is 5 years newer.
Showing the 5 closest of 55 Montana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Fergus County | 158 | 31.6% | 62% | 6.3% | 1978 |
| Mineral County | 152 | 25.7% | 64.5% | 9.9% | 1971 |
| Ravalli County (this page) | 148 | 41.2% | 53.4% | 5.4% | 1981 |
| Big Horn County | 135 | 26.7% | 68.1% | 5.2% | 1978 |
| Jefferson County | 134 | 17.9% | 76.9% | 5.2% | 1977 |
| Park County | 124 | 21% | 68.5% | 10.5% | 1976 |
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 Ravalli 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 Ravalli County, both outside Montana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MT (148 bridges here).
- Claiborne County, LA · 148 bridges
- Nance County, NE · 148 bridges
- Cayuga County, NY · 148 bridges
- Wasco County, OR · 148 bridges
Similar average build year
Nearest mean year-built outside MT (1981 here).
- Franklin County, OH · avg 1981 · 922 bridges
- Greenville County, SC · avg 1981 · 635 bridges
- Montgomery County, OH · avg 1981 · 632 bridges
- McLean County, IL · avg 1981 · 624 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (148)
NO DATA ENTERED
FairOver: NEZPERCE FK BTT
NO DATA ENTERED, Ravalli, MT
Built 1954 Load: 14.3 t ADT: 10
QUAST LN
FairOver: SURPRISE DITCH 060
1M N CORVALLIS, Ravalli, MT
Built 1918 Load: 16.3 t ADT: 527
GRANTSDALE RD
FairOver: SKALKAHO CR OVERFLOW 040
GRANTSDALE, Ravalli, MT
Built 1935 Load: 17.2 t ADT: 471
US 93
FairOver: KOOTENAI CREEK
6M N VICTOR, Ravalli, MT
Built 2008 Load: 18.1 t ADT: 12,937
NO DATA ENTERED
FairOver: LOST HORSE CR
NO DATA ENTERED, Ravalli, MT
Built 1968 Load: 18.8 t ADT: 14
NO DATA ENTERED
FairOver: LOSTHORSE CR
NO DATA ENTERED, Ravalli, MT
Built 1958 Load: 18.8 t ADT: 5
NO DATA ENTERED
FairOver: E FK BITTERROOT RI
NO DATA ENTERED, Ravalli, MT
Built 1969 Load: 18.8 t ADT: 9
NO DATA ENTERED
FairOver: E F BITTERROOT
NO DATA ENTERED, Ravalli, MT
Built 1947 Load: 19.1 t ADT: 50
WILLOW CREEK RD
FairOver: BITTERROOT CANAL 061
4M E CORVALLIS, Ravalli, MT
Built 1964 Load: 19.6 t ADT: 100
NO DATA ENTERED
FairOver: HUGHES CR
NO DATA ENTERED, Ravalli, MT
Built 1964 Load: 20.0 t ADT: 10
E FORK RD
FairOver: E FORK BITTERROOT R 009
14M NE SULA, Ravalli, MT
Built 1947 Load: 20.0 t ADT: 303
ROUTE 362
FairOver: W F BITTERROOT
NO DATA ENTERED, Ravalli, MT
Built 1957 Load: 20.7 t ADT: 20
THORNING LOOP
FairOver: RYE CREEK 064
4M S DARBY, Ravalli, MT
Built 1975 Load: 20.8 t ADT: 100
NO DATA ENTERED
FairOver: W F BITTERROOT
NO DATA ENTERED, Ravalli, MT
Built 1954 Load: 21.1 t ADT: 10
VICTOR CROSSING E
FairOver: BITTERROOT RIVER 019
1M E VICTOR, Ravalli, MT
Built 1982 Load: 21.1 t ADT: 100
OLD DARBY RD
FairOver: ROCK CREEK 052
4M N DARBY, Ravalli, MT
Built 1918 Load: 21.8 t ADT: 100
STEVI CUTOFF RD
FairOver: BITTERROOT RIVER OVERFLO
1M NW STEVENSVILLE, Ravalli, MT
Built 1951 Load: 21.8 t ADT: 7,991
VICTOR CROSSING W
FairOver: BITTERROOT RIVER 020
1M E VICTOR, Ravalli, MT
Built 1984 Load: 22.0 t ADT: 100
NO DATA ENTERED
FairOver: OVERWHICH CR
NO DATA ENTERED, Ravalli, MT
Built 1964 Load: 22.7 t ADT: 2
NO DATA ENTERED
FairOver: OVERWHICH CR
NO DATA ENTERED, Ravalli, MT
Built 1972 Load: 23.6 t ADT: 2
BOWMAN RD
FairOver: BLODGETT CREEK 024
2M NW HAMILTON, Ravalli, MT
Built 1993 Load: 23.6 t ADT: 1,922
US 93 FH 19
FairOver: E FORK BITTERROOT RIVER
5M SE CONNER, Ravalli, MT
Built 1937 Load: 23.6 t ADT: 1,069
NO DATA ENTERED
FairOver: LITTLE WEST FORK CR
NO DATA ENTERED, Ravalli, MT
Built 1968 Load: 24.0 t ADT: 5
VICTOR CROSSING W
FairOver: BITTERROOT RIVER 021
1M E VICTOR, Ravalli, MT
Built 2000 Load: 24.0 t ADT: 100
US 93
FairOver: BITTERROOT RIVER
3M S HAMILTON, Ravalli, MT
Built 1949 Load: 24.5 t ADT: 6,789
WOODSIDE CUTOFF RD
FairOver: BITTERROOT RIVER
WOODSIDE, Ravalli, MT
Built 1954 Load: 24.5 t ADT: 6,621
S 531-WESTSIDE RD
FairOver: ROARING LION CREEK
1M SW HAMILTON, Ravalli, MT
Built 1972 Load: 24.5 t ADT: 509
OLD DARBY RD
FairOver: BITTERROOT RIVER 074
5M N DARBY, Ravalli, MT
Built 1917 Load: 25.4 t ADT: 284
NO DATA ENTERED
FairOver: BLODGETT CR
NO DATA ENTERED, Ravalli, MT
Built 1967 Load: 26.2 t ADT: 20
IRON CAP DR
FairOver: IRRIGATION CANAL 054
5M SE STEVENSVILLE, Ravalli, MT
Built 1972 Load: 26.3 t ADT: 100
NO DATA ENTERED
FairOver: W F BITTERROOT COAL
NO DATA ENTERED, Ravalli, MT
Built 1960 Load: 27.2 t ADT: 30
US 93 FH 19
FairOver: RYE CREEK
5M SE DARBY, Ravalli, MT
Built 1990 Load: 28.1 t ADT: 1,069
BELL CROSSING
FairOver: BITTERROOT RIVER
2M NE VICTOR, Ravalli, MT
Built 1974 Load: 28.1 t ADT: 2,762
W MAIN ST
FairOver: BITTERROOT RIVER
W HAMILTON, Ravalli, MT
Built 1968 Load: 28.1 t ADT: 2,730
ROAD 436
FairOver: CAMP CR
NO DATA ENTERED, Ravalli, MT
Built 1979 Load: 28.2 t ADT: 20
SKALKAHO HWY
FairOver: CANAL 058
3M SE GRANTSDALE, Ravalli, MT
Built 1941 Load: 29.0 t ADT: 325
ROUTE 49
FairOver: W F BITTERROOT
NO DATA ENTERED, Ravalli, MT
Built 1964 Load: 29.2 t ADT: 21
US 93
FairOver: BITTERROOT RIVER
2M N HAMILTON, Ravalli, MT
Built 2005 Load: 30.8 t ADT: 14,663
US 93 FH 19
FairOver: BITTERROOT RIVER
4M SE DARBY, Ravalli, MT
Built 1986 Load: 31.8 t ADT: 1,069
INDIAN PRAIRIE LP
FairOver: BIG CREEK 016
3M N VICTOR, Ravalli, MT
Built 1973 Load: 32.7 t ADT: 100
CHIEF VICTOR CAMP
FairOver: SWEATHOUSE CREEK 062
VICTOR, Ravalli, MT
Built 1993 Load: 32.7 t ADT: 100
SHEAFMAN CREEK RD
FairOver: MILL CREEK 106
5M S VICTOR, Ravalli, MT
Built 1973 Load: 32.7 t ADT: 100
AMBROSE CREEK RD
FairOver: BITTERROOT CANAL 093
6M SE FLORENCE, Ravalli, MT
Built 1986 Load: 32.7 t ADT: 100
MERIDIAN RD
FairOver: MILL CREEK 014
5M S VICTOR, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 100
DUTCH HILL RD
FairOver: MILL CREEK 072
W OF WOODSIDE, Ravalli, MT
Built 1985 Load: 32.7 t ADT: 100
MID BURNT FORK RD
FairOver: NORTH BURNT FORK CK
10M SE STEVENSVILLE, Ravalli, MT
Built 2012 Load: 32.7 t ADT: 87
STEVENSVILLE AIRPO
FairOver: SUPPLY DITCH 092
1M NE STEVENSVILLE, Ravalli, MT
Built 1987 Load: 32.7 t ADT: 100
HOME ACRES RD
FairOver: SUPPLY DITCH 023
5M E VICTOR, Ravalli, MT
Built 1978 Load: 32.7 t ADT: 450
GRANTSDALE RD
FairOver: SKALKAHO CREEK 102
N GRANTSDALE, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 471
HOBLITT LN
FairOver: SWEENEY CREEK 055
1M S FLORENCE, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 100
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.