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
PACKER CREEK RD
FairOver: PACKER CREEK 008
N SALTESE, Mineral, MT
Built 1957 Load: 32.7 t ADT: 100
I 90
FairOver: RR
5M W MISSOULA, Missoula, MT
Built 1966 Load: 32.7 t ADT: 9,435
I 90
FairOver: RR
5M W MISSOULA, Missoula, MT
Built 1966 Load: 32.7 t ADT: 9,435
I 90
FairOver: CLARK FORK RIVER
1.9M W BONNER, Missoula, MT
Built 1965 Load: 32.7 t ADT: 9,994
I 90
FairOver: CLARK FORK RIVER
1.9M W BONNER, Missoula, MT
Built 1965 Load: 32.7 t ADT: 9,994
W NINEMILE RD
FairOver: NINEMILE CREEK 030
8M NW FRENCHTOWN, Missoula, MT
Built 1975 Load: 32.7 t ADT: 477
PLACID LAKE RD
FairOver: CLEARWATER RIVER 078
3M S SEELEY LAKE, Missoula, MT
Built 1970 Load: 32.7 t ADT: 100
SAWMILL GULCH RD
FairOver: RATTLESNAKE CREEK 017
3M N MISSOULA, Missoula, MT
Built 1989 Load: 32.7 t ADT: 100
PINERIDGE RD
FairOver: HOLLAND CREEK 054
7M S CONDON, Missoula, MT
Built 1978 Load: 32.7 t ADT: 100
PINERIDGE RD
FairOver: SWAN RIVER 055
7M S CONDON, Missoula, MT
Built 1977 Load: 32.7 t ADT: 100
GUEST RANCH RD
FairOver: SWAN RIVER 056
1.5M S CONDON, Missoula, MT
Built 1978 Load: 32.7 t ADT: 100
MALLARD WAY
FairOver: FRENCHTOWN CANAL 100
10M NW MISSOULA, Missoula, MT
Built 1975 Load: 32.7 t ADT: 100
EXPRESSWAY RD
FairOver: GRANT CREEK 003
MISSOULA-EXPRESSWAY RD, Missoula, MT
Built 1981 Load: 32.7 t ADT: 7,797
INTERNATIONAL DR
FairOver: GRANT CREEK 005
MISSOULA-INTERNATIONAL DR, Missoula, MT
Built 1981 Load: 32.7 t ADT: 100
I 90
FairOver: MISSION CREEK
9.9M E LIVINGSTON, Park, MT
Built 1959 Load: 32.7 t ADT: 5,692
CONLIN RD
FairOver: EMIGRANT CREEK 075
3M SE EMMIGRANT, Park, MT
Built 2008 Load: 32.7 t ADT: 100
TRAIL CREEK RD
FairOver: IRRIGATION CANAL 001
1M N EMIGRANT, Park, MT
Built 1989 Load: 32.7 t ADT: 100
US 89
FairOver: FLATHEAD CREEK
1M N WILSALL, Park, MT
Built 1973 Load: 32.7 t ADT: 1,119
PETROLIA LAKE RD
FairOver: MCDONALD CREEK 014
6M E WINNETT, Petroleum, MT
Built 1980 Load: 32.7 t ADT: 100
BLAKESLEE RD
FairOver: CANAL 030
7M N TEIGEN, Petroleum, MT
Built 1978 Load: 32.7 t ADT: 100
1127: DRY FORK
FairOver: CAMP CREEK
4 mi SE of US 191, Phillips, MT
Built 1976 Load: 32.7 t ADT: 25
SAVOY RD
FairOver: DODSON NORTH CANAL 014
2M W DODSON, Phillips, MT
Built 1990 Load: 32.7 t ADT: 16
IRR - US 2
FairOver: PEOPLES CREEK
6M W DODSON, Phillips, MT
Built 1972 Load: 32.7 t ADT: 1,281
PRICE RD N
FairOver: PONDERA COULEE 007
9M E CONRAD, Pondera, MT
Built 1970 Load: 32.7 t ADT: 100
MIDWAY RD E
FairOver: PONDERA COULEE 003
16M NE BRADY, Pondera, MT
Built 1960 Load: 32.7 t ADT: 59
COALMINE RD
FairOver: DRAINAGE 032
15M W CONRAD, Pondera, MT
Built 1986 Load: 32.7 t ADT: 100
POWDERVILLE RD E
FairOver: CROW CREEK 004
23M NE BROADUS, Powder River, MT
Built 1986 Load: 32.7 t ADT: 48
S 484 FH 51
FairOver: OTTER CREEK
7M SE ASHLAND, Powder River, MT
Built 1963 Load: 32.7 t ADT: 77
C.WOOD LAKES RD
FairOver: MORRELL CREEK
COTTONWOOD LAKES, Powell, MT
Built 1954 Load: 32.7 t ADT: 50
SAWMILL RD
FairOver: CLARK FORK RIVER 026
GARRISON, Powell, MT
Built 2006 Load: 32.7 t ADT: 77
RAYMOND RD
FairOver: BLACKFOOT RIVER 077
6M S OVANDO, Powell, MT
Built 1997 Load: 32.7 t ADT: 100
S 271
FairOver: NEVADA CREEK
1M NE HELMVILLE, Powell, MT
Built 1947 Load: 32.7 t ADT: 302
OLD HWY 10 W
FairOver: DRAINAGE 022
1M SW TERRY, Prairie, MT
Built 1930 Load: 32.7 t ADT: 504
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
GOLF COURSE RD
FairOver: BITTERROOT CANAL 045
3M SE HAMILTON, Ravalli, MT
Built 1986 Load: 32.7 t ADT: 100
TAMMANY LN
FairOver: BITTERROOT CANAL 046
4M SE HAMILTON, Ravalli, MT
Built 1988 Load: 32.7 t ADT: 100
FOLEY LN
FairOver: SKALKAHO CREEK 041
1M E GRANTSDALE, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 100
GOLF COURSE RD
FairOver: BITTERROOT CANAL 044
2M SE GRANTSDALE, Ravalli, MT
Built 1984 Load: 32.7 t ADT: 100
OLD DARBY RD
FairOver: SLEEPING CHILD CREEK 075
6M S HAMILTON, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 238
S SHOSHONE LOOP
FairOver: SKALKAHO CREEK 043
3M SE GRANTSDALE, Ravalli, MT
Built 1979 Load: 32.7 t ADT: 100
Showing 2,551-2,600 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 |