Total Bridges
5,122
Public highway bridges in Montana
State profile · Near national median SD
Montana bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Montana — drawn straight from the FHWA National Bridge Inventory.
- 5,122
- Public bridges
- 28.3%
- Good condition
- 6.7%
- Poor condition
- 6.7%
- Structurally deficient
Good Condition
28.3%
1,447 bridges rated 7-9
-21.7pp vs 50% benchmark
Poor Condition
6.7%
343 bridges rated 0-4
Structurally Deficient
6.7%
343 bridges flagged for repair priority
-0.3pp vs national avg 7.0%
Montana vs national bridge condition
Montana — Good condition share 28.3%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Montana — Structurally deficient share 22.3%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — Montana (FHWA NBI)
Counties (56)
Beaverhead 217 Big Horn 136 Blaine 101 Broadwater 31 Carbon 77 Carter 39 Cascade 185 Chouteau 42 Custer 71 Daniels 32 Dawson 109 Deer Lodge 68 Fallon 35 Fergus 155 Flathead 195 Gallatin 207 Garfield 26 Glacier 68 Golden Valley 17 Granite 73 Hill 44 Jefferson 128 Judith Basin 48 Lake 111 Lewis and Clark 196 Liberty 11 Lincoln 190 Madison 84 McCone 44 Meagher 52 Mineral 152 Missoula 205 Musselshell 25 Park 124 Petroleum 26 Phillips 100 Pondera 96 Powder River 23 Powell 112 Prairie 46 Ravalli 149 Richland 96 Roosevelt 57 Rosebud 114 Sanders 116 Sheridan 66 Silver Bow 66 Stillwater 90 Sweet Grass 89 Teton 81 Toole 35 Treasure 26 Valley 103 Wheatland 26 Wibaux 24 Yellowstone 283
Montana vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Montana on the same metric.
37
North Carolina
6.16% top marginal rate
15
Hawaii
6.47% top marginal rate
30
Montana
6.70% top marginal rate
36
New York
6.90% top marginal rate
21
Kentucky
7.06% top marginal rate
Bridges Needing Most Attention in Montana
Six lowest-condition bridges in Montana, ranked by composite NBI rating. Each is inspected at least every 24 months.
HWY 91 N
PoorOver: BIG HOLE RIVER 041
22M N DILLON, Beaverhead, MT
Built 1940 Load: 2.7 t ADT: 155
SLEEPY HOLLOW LN
Structurally DeficientOver: PRICKLY PEAR CREEK
3 M S MONTANA CITY, Jefferson, MT
Built 2010 Load: 2.7 t ADT: 100
CARBINE RD
PoorOver: PABLO CANAL 026
4M W PABLO, Lake, MT
Built 1986 Load: 2.7 t ADT: 100
BOY SCOUT RD
PoorOver: CLEARWATER RIVER 082
2M NW SEELEY LAKE, Missoula, MT
Built 1938 Load: 2.7 t ADT: 100
ASHLEY LAKE RD
PoorOver: PABLO FEEDER CANAL 045
5M NE ST IGNATIUS, Lake, MT
Built 1965 Load: 3.0 t ADT: 100
SHEEP CR RD
Structurally DeficientOver: SHEEP CREEK 097
12M S CASCADE, Cascade, MT
Built 1950 Load: 3.6 t ADT: 68
All Bridges in Montana
IRR BIA RTE 1
FairOver: TWO MEDICINE RIVER
16 KM SOUTH OF BROWNING, Glacier, MT
Built 1967 Load: 32.4 t ADT: 1,000
IRR BIA RTE 1
FairOver: BADGER CREEK
27.4 KM SOUTH OF BROWNING, Glacier, MT
Built 1967 Load: 32.4 t ADT: 1,000
IRR BIA RTE 2
FairOver: S FRK TWO MEDICINE RIVER
6.4 KM SE OF E GLACIER PK, Glacier, MT
Built 1962 Load: 32.4 t ADT: 75
IRR BIA RTE 130
FairOver: ST. MARY RIVER
13 KM SOUTH OF BABB, Glacier, MT
Built 1964 Load: 32.4 t ADT: 300
IRR BIA RTE 130
FairOver: SWIFT CURRENT CREEK
3 KM SOUTH OF BABB, Glacier, MT
Built 1966 Load: 32.4 t ADT: 300
IRR BIA RTE 57
FairOver: TWO MEDICINE MAIN CANAL
31 KM E,7 KM SO. BROWNING, Glacier, MT
Built 1990 Load: 32.4 t ADT: 10
593 LONG MEADOW RD
FairOver: YAAK R
JCT 593/508, Lincoln, MT
Built 1961 Load: 32.4 t ADT: 50
NO DATA ENTERED
FairOver: NO DATA ENTERED
SEC 24; T8N; R19W, Ravalli, MT
Built 1967 Load: 32.4 t ADT: 10
ROUTE 108
FairOver: SUN RIVER
SUN RIVER, Teton, MT
Built 1967 Load: 32.4 t ADT: 113
RED ROCK PASS RD
FairOver: ODELL CREEK
1.2 MI SE OF LAKEVIEW, Beaverhead, MT
Built 1992 Load: 32.7 t ADT: 100
I 15
FairOver: BEAVERHEAD RIVER
CLARK CANYON DAM, Beaverhead, MT
Built 1962 Load: 32.7 t ADT: 2,836
I 15
FairOver: DRAINAGE IRR DITCH
DILLON, Beaverhead, MT
Built 1973 Load: 32.7 t ADT: 3,991
CO RD 002 FH 73
FairOver: WISE RIVER 020
12M S WISE RIVER, Beaverhead, MT
Built 1971 Load: 32.7 t ADT: 289
CO RD 002 FH 73
FairOver: WISE RIVER 076
13M S WISE RIVER, Beaverhead, MT
Built 1971 Load: 32.7 t ADT: 289
LOWER N FORK RD
FairOver: IRRIGATION CANAL 068
7M N WISDOM, Beaverhead, MT
Built 1994 Load: 32.7 t ADT: 44
TWIN LAKES RD
FairOver: BIG HOLE RIVER 080
6M S WISDOM, Beaverhead, MT
Built 1999 Load: 32.7 t ADT: 100
BIG LAKE CR
FairOver: BIG HOLE RIVER 090
8M NW JACKSON, Beaverhead, MT
Built 1977 Load: 32.7 t ADT: 100
SAGE CREEK RD
FairOver: SAGE CREEK 024
12M NE DELL, Beaverhead, MT
Built 1985 Load: 32.7 t ADT: 70
BIG SHEEP CR RD
FairOver: BIG SHEEP CREEK 122
5.6M SW DELL, Beaverhead, MT
Built 1985 Load: 32.7 t ADT: 175
S 43 FH 20
FairOver: BIG HOLE RIVER
WISDOM, Beaverhead, MT
Built 1962 Load: 32.7 t ADT: 590
IRR BIA RTE 24
FairOver: ROSEBUD CREEK
0.3 MILES WEST OF ROSEBUD, Big Horn, MT
Built 2019 Load: 32.7 t ADT: 60
W BOEHS RD
FairOver: TWO LEGGIN`S CANAL 049
3M NW HARDIN, Big Horn, MT
Built 1996 Load: 32.7 t ADT: 100
COUNTY ROAD 103
FairOver: HANGING WOMAN CREEK 056
24M NE DECKER, Big Horn, MT
Built 1986 Load: 32.7 t ADT: 331
CLEVELAND RD
FairOver: RED ROCK CREEK
CHINOOK, Blaine, MT
Built 1964 Load: 32.7 t ADT: 849
CLEVELAND RD
FairOver: SNAKE CREEK
9M NW CLEVELAND, Blaine, MT
Built 1957 Load: 32.7 t ADT: 159
CLEVELAND RD
FairOver: PEOPLES CREEK
CLEVELAND, Blaine, MT
Built 1957 Load: 32.7 t ADT: 109
LOMBARD RD
FairOver: BROADWATER MISSOURI 018
1M SE TOSTON, Broadwater, MT
Built 1976 Load: 32.7 t ADT: 100
SIXMILE RD
FairOver: BROADWATER CANAL 016
2M N TOSTON, Broadwater, MT
Built 1976 Load: 32.7 t ADT: 100
GREAVES RD
FairOver: BROADWATER MISSOURI 017
1M N TOSTON, Broadwater, MT
Built 1976 Load: 32.7 t ADT: 100
FERRY ST
FairOver: BROADWATER MISSOURI 020
TOSTON, Broadwater, MT
Built 1980 Load: 32.7 t ADT: 100
BOYD COONEY DAM RD
FairOver: COONEY RES SPILLWAY 014
7M W BOYD, Carbon, MT
Built 1982 Load: 32.7 t ADT: 564
RED LODGE CR RD
FairOver: E RED LODGE CREEK 010
8M W ROBERTS, Carbon, MT
Built 1970 Load: 32.7 t ADT: 100
TWO MILE BRIDGE RD
FairOver: ROCK CREEK 024
2M N RED LODGE, Carbon, MT
Built 1982 Load: 32.7 t ADT: 100
JOLIET FROMBERG RD
FairOver: ELBOW CREEK 035
2M SE JOLIET, Carbon, MT
Built 1979 Load: 32.7 t ADT: 173
CARBON AVE
FairOver: ROCK CREEK 026
1M E ROBERTS, Carbon, MT
Built 1982 Load: 32.7 t ADT: 100
E PRYOR RD
FairOver: CLARKS FK YELLOWSTNE 056
E EDGAR, Carbon, MT
Built 1980 Load: 32.7 t ADT: 411
E BRIDGER RD
FairOver: CLARKS FK YELLOWSTNE 055
E BRIDGER, Carbon, MT
Built 1980 Load: 32.7 t ADT: 258
GOLDEN LN
FairOver: CLARKS FK YELLOWSTNE 008
6M SW BRIDGER, Carbon, MT
Built 1981 Load: 32.7 t ADT: 100
US 212
FairOver: ROCK CREEK
1M W JOLIET, Carbon, MT
Built 1974 Load: 32.7 t ADT: 3,282
HAMMOND RD
FairOver: CORRAL CREEK
29M NE HAMMOND, Carter, MT
Built 2000 Load: 32.7 t ADT: 32
POWERLINE RD
FairOver: DRAINAGE 025
9M N GREAT FALLS, Cascade, MT
Built 1931 Load: 32.7 t ADT: 100
HUGHESVILLE RD
FairOver: DRY FORK BELT CREEK 077
E MONARCH, Cascade, MT
Built 1962 Load: 32.7 t ADT: 100
HUGHESVILLE RD
FairOver: DRY FORK BELT CREEK 078
2M E MONARCH, Cascade, MT
Built 1962 Load: 32.7 t ADT: 100
HUGHESVILLE RD
FairOver: DRY FORK BELT CREEK 080
4M E MONARCH, Cascade, MT
Built 1962 Load: 32.7 t ADT: 100
HUGHESVILLE RD
FairOver: DRY FORK BELT CREEK 103
7M E MONARCH, Cascade, MT
Built 1962 Load: 32.7 t ADT: 100
ADEL RD
FairOver: W FORK HOUND CREEK 120
19M SE CASCADE, Cascade, MT
Built 1950 Load: 32.7 t ADT: 100
US 89 FH 32
FairOver: BELT CREEK
1M SE NEIHART, Cascade, MT
Built 2001 Load: 32.7 t ADT: 385
25TH ST N
FairOver: ABANDONED RAILROAD
GREAT FALLS-25TH ST N, Cascade, MT
Built 1914 Load: 32.7 t ADT: 4,632
FRENCH LN
FairOver: POPLAR RIVER OVERFLO 015
4M NW SCOBEY, Daniels, MT
Built 1978 Load: 32.7 t ADT: 99
I 94
FairOver: DRY CREEK
W GLENDIVE, Dawson, MT
Built 1969 Load: 32.7 t ADT: 3,275
Showing 2,401-2,450 of 5,122 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |