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
LAKE MCDONALD LODG
FairOver: SNYDER CREEK
10.8 Mi. NE of Jct. Hwy., Flathead, MT
Built 1935 Load: 27.2 t ADT: 100
WESTWOOD LN
FairOver: WHITEFISH RIVER 169
KALISPELL-WESTWOOD LN, Flathead, MT
Built 1992 Load: 27.2 t ADT: 100
MANLEY RD
FairOver: E GALLATIN RIVER 089
2M N BOZEMAN, Gallatin, MT
Built 1996 Load: 27.2 t ADT: 100
LOGAN TRIDENT RD
FairOver: GALLATIN RIVER 008
1M W LOGAN, Gallatin, MT
Built 1964 Load: 27.2 t ADT: 1,303
COTTONWOOD CNYN RD
FairOver: COTTONWOOD CREEK 041
4M SE GALLATIN GATEWAY, Gallatin, MT
Built 1986 Load: 27.2 t ADT: 100
S 59
FairOver: LITTLE DRY CREEK
SOUTH COHAGEN, Garfield, MT
Built 1976 Load: 27.2 t ADT: 293
S 200
FairOver: DRAINAGE
20M W BROCKWAY, Garfield, MT
Built 1938 Load: 27.2 t ADT: 544
TWO MEDICINE ROAD
FairOver: APPISTOKI CREEK
7.3 miles northwest of Mo, Glacier, MT
Built 1929 Load: 27.2 t ADT: 183
US 12
FairOver: DRAINAGE
2M E LAVINA, Golden Valley, MT
Built 1935 Load: 27.2 t ADT: 459
WATERLOO RD
FairOver: JEFFERSON RIVER
9M NE SILVERSTAR, Jefferson, MT
Built 1961 Load: 27.2 t ADT: 237
IRR - US 93
FairOver: POST CREEK
6M N ST IGNATIUS, Lake, MT
Built 1933 Load: 27.2 t ADT: 7,072
IRR - US 93
FairOver: DAYTON CREEK
DAYTON, Lake, MT
Built 1987 Load: 27.2 t ADT: 4,951
COUNTY ROAD 061
FairOver: LEVINGS GULCH 158
1M N SIEBEN INT, Lewis and Clark, MT
Built 1933 Load: 27.2 t ADT: 13
US 287
FairOver: SUN RIVER
4M NE AUGUSTA, Lewis and Clark, MT
Built 1936 Load: 27.2 t ADT: 535
SWAMP CREEK ROAD
FairOver: SWAMP CREEK
24M NW HAPPY`S INN, Lincoln, MT
Built 1936 Load: 27.2 t ADT: 100
S WILLOW CREEK RD
FairOver: SOUTH WILLOW CREEK 064
4M S PONY, Madison, MT
Built 2003 Load: 27.2 t ADT: 100
DUNCAN DISTRICT RD
FairOver: RUBY RIVER 022
4M SW SHERIDAN, Madison, MT
Built 2010 Load: 27.2 t ADT: 100
US 287
FairOver: INDIAN CREEK
7M S CAMERON, Madison, MT
Built 1933 Load: 27.2 t ADT: 1,789
S 13
FairOver: HORSE CREEK
CIRCLE, McCone, MT
Built 1988 Load: 27.2 t ADT: 905
S 13
FairOver: DUCK CREEK
14M NE CIRCLE, McCone, MT
Built 1992 Load: 27.2 t ADT: 787
S 13
FairOver: COW CREEK
10M S VIDA, McCone, MT
Built 1993 Load: 27.2 t ADT: 787
S 200
FairOver: DRAINAGE
12M W BROCKWAY, McCone, MT
Built 1939 Load: 27.2 t ADT: 1,012
ED LAVELL LN
FairOver: SIXTEENMILE CREEK 039
3M E RINGLING, Meagher, MT
Built 1959 Load: 27.2 t ADT: 100
I 90
FairOver: ST. REGIS RIVER
4.3M W ST. REGIS, Mineral, MT
Built 1981 Load: 27.2 t ADT: 3,180
I 90
FairOver: ST. REGIS RIVER
4.3M W ST. REGIS, Mineral, MT
Built 1981 Load: 27.2 t ADT: 3,180
PETTY CREEK RD
FairOver: CLARK FORK 008
2M E ALBERTON, Missoula, MT
Built 1964 Load: 27.2 t ADT: 930
SNOW BOWL RD
FairOver: GRANT CREEK 020
7M N MISSOULA, Missoula, MT
Built 1967 Load: 27.2 t ADT: 100
US 12 FH 11
FairOver: LOLO CREEK
1M S LOLO HOT SPRINGS, Missoula, MT
Built 1951 Load: 27.2 t ADT: 747
S 210
FairOver: MRL SPUR (NOT IN USE)
BONNER, Missoula, MT
Built 1929 Load: 27.2 t ADT: 2,063
US 89
FairOver: YELLOWSTONE RIVER
11M SW EMIGRANT, Park, MT
Built 1958 Load: 27.2 t ADT: 1,547
CONTENT RD
FairOver: SAGE CREEK OVERFLOW 055
39M SE MALTA, Phillips, MT
Built 1983 Load: 27.2 t ADT: 100
STAGE RD
FairOver: WILD HORSE CK OVRFLW 022
17M S DODSON, Phillips, MT
Built 1960 Load: 27.2 t ADT: 100
WAGNEW DUMO RD
FairOver: DODSON SOUTH CANAL 034
2M S WAGNER, Phillips, MT
Built 1981 Load: 27.2 t ADT: 100
W STRATER RD
FairOver: DODSON SOUTH CANAL 117
5M E MALTA, Phillips, MT
Built 1992 Load: 27.2 t ADT: 100
IRR - US 191
FairOver: HALFWAY COULEE
11M SW MALTA, Phillips, MT
Built 1940 Load: 27.2 t ADT: 375
I 15
FairOver: PONDERA CANAL
9M N CONRAD, Pondera, MT
Built 1972 Load: 27.2 t ADT: 1,490
LITTLE BLACKFOOT R
FairOver: LITTLE BLACKFOOT R 021
3M S ELLISTON, Powell, MT
Built 1976 Load: 27.2 t ADT: 100
CUT OFF RD
FairOver: BIG BLACKFOOT RIVER 002
4M NW HELMVILLE, Powell, MT
Built 1955 Load: 27.2 t ADT: 100
S 141
FairOver: STOCKPASS-DRAINAGE
2M SE HELMSVILLE, Powell, MT
Built 1965 Load: 27.2 t ADT: 1,382
NO DATA ENTERED
FairOver: W F BITTERROOT COAL
NO DATA ENTERED, Ravalli, MT
Built 1960 Load: 27.2 t ADT: 30
9TH AVE SW
FairOver: LONE TREE CREEK 083
SIDNEY-9TH AVE SW, Richland, MT
Built 1999 Load: 27.2 t ADT: 1,485
IRR COUNTY ROAD 20
FairOver: SMOKE CREEK 016
21M N BROCKTON, Roosevelt, MT
Built 1955 Load: 27.2 t ADT: 100
S BAINVILLE RD
FairOver: LITTLE MUDDY CREEK 049
4M S BAINVILLE, Roosevelt, MT
Built 1995 Load: 27.2 t ADT: 42
IRR - S 13
FairOver: LITTLE WOLF CREEK
2M E WOLF POINT, Roosevelt, MT
Built 1978 Load: 27.2 t ADT: 1,459
IRR - S 251
FairOver: DRAINAGE
20M NE POPLAR, Roosevelt, MT
Built 1948 Load: 27.2 t ADT: 142
I 94
FairOver: ROSEBUD CREEK
1M W ROSEBUD, Rosebud, MT
Built 1970 Load: 27.2 t ADT: 2,602
I 94
FairOver: GRAVEYARD CREEK
1M E HATHAWAY, Rosebud, MT
Built 1977 Load: 27.2 t ADT: 2,602
ROSEBUD CREEK RD
FairOver: ROSEBUD CR OVRFLOW 046
10M SE COLSTRIP, Rosebud, MT
Built 1980 Load: 27.2 t ADT: 38
OLD HWY 10 E
FairOver: DRAINAGE 052
3M W FORSYTH, Rosebud, MT
Built 1941 Load: 27.2 t ADT: 350
IRR - S 350
FairOver: BIG MUDDY CREEK
9M NW FROID, Sheridan, MT
Built 1957 Load: 27.2 t ADT: 28
Showing 1,901-1,950 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 |