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
LIL SLEEPING CHILD
FairOver: SLEEPING CHILD CREEK 038
7M SE HAMILTON, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 100
CONNER CUTOFF RD
FairOver: W FORK BITTERROOT R 049
1M W CONNER, Ravalli, MT
Built 1962 Load: 32.7 t ADT: 100
STEVI CUTOFF RD
FairOver: BITTERROOT RIVER
1M NW STEVENSVILLE, Ravalli, MT
Built 1951 Load: 32.7 t ADT: 7,991
WEST FORK RD
FairOver: TRAPPER CREEK
6M SW CONNER, Ravalli, MT
Built 1957 Load: 32.7 t ADT: 871
S 531-WESTSIDE RD
FairOver: SAWTOOTH CREEK
3M SW HAMILTON, Ravalli, MT
Built 1972 Load: 32.7 t ADT: 954
COUNTY ROAD 001
FairOver: CHARLIE CREEK 043
42M NW SIDNEY, Richland, MT
Built 1983 Load: 32.7 t ADT: 100
COUNTY ROAD 002
FairOver: EAST REDWATER CREEK 084
16M N RICHEY, Richland, MT
Built 2008 Load: 32.7 t ADT: 34
COUNTY ROAD 002
FairOver: N FK LISK CREEK 034
7M N RICHEY, Richland, MT
Built 1985 Load: 32.7 t ADT: 34
COUNTY ROAD 021
FairOver: HARDSCRABBLE CREEK 075
37M NW SIDNEY, Richland, MT
Built 1997 Load: 32.7 t ADT: 100
COUNTY ROAD 203
FairOver: NORTH FK FOURMILE CR 061
9M NW FAIRVIEW, Richland, MT
Built 1991 Load: 32.7 t ADT: 100
COUNTY ROAD 208
FairOver: N FK FIRST HAY CREEK 068
8M W FAIRVIEW, Richland, MT
Built 1985 Load: 32.7 t ADT: 100
COUNTY ROAD 132
FairOver: USBR MAIN CANAL 064
2M SW FAIRVIEW, Richland, MT
Built 1985 Load: 32.7 t ADT: 100
COUNTY ROAD 213
FairOver: FOUR MILE CREEK 062
9M NW FAIRVIEW, Richland, MT
Built 1983 Load: 32.7 t ADT: 100
COUNTY ROAD 217
FairOver: SECOND HAY CREEK 023
7M W FAIRVIEW, Richland, MT
Built 1980 Load: 32.7 t ADT: 100
COUNTY ROAD 221
FairOver: FOUR MILE CREEK 060
6M NW FAIRVIEW, Richland, MT
Built 1983 Load: 32.7 t ADT: 100
COUNTY ROAD 131
FairOver: USBR MAIN CANAL 072
4M SW FAIRVIEW, Richland, MT
Built 2000 Load: 32.7 t ADT: 100
COUNTY ROAD 334
FairOver: USBR MAIN CANAL 078
7M SW SAVAGE, Richland, MT
Built 1992 Load: 32.7 t ADT: 100
COUNTY ROAD 349
FairOver: SHADWELL CREEK 019
24M SE SIDNEY, Richland, MT
Built 1938 Load: 32.7 t ADT: 100
COUNTY ROAD 403
FairOver: USBR MAIN CANAL 008
W CRANE, Richland, MT
Built 1997 Load: 32.7 t ADT: 100
COUNTY ROAD 410
FairOver: USBR MAIN CANAL 010
5M NE CRANE, Richland, MT
Built 1983 Load: 32.7 t ADT: 113
COUNTY ROAD 411
FairOver: USBR MAIN CANAL 011
2M N CRANE, Richland, MT
Built 1982 Load: 32.7 t ADT: 100
14TH ST SE
FairOver: LONE TREE CREEK
S EDGE SIDNEY-14TH ST SE, Richland, MT
Built 1973 Load: 32.7 t ADT: 3,081
US 2
FairOver: SHOTGUN CREEK
NE OF BAINVILLE, Roosevelt, MT
Built 2010 Load: 32.7 t ADT: 1,676
BIG PORCUPINE RD
FairOver: BIG PORCUPINE CR 010
5M NE VANANDA, Rosebud, MT
Built 1992 Load: 32.7 t ADT: 100
OLD US 10
FairOver: BUTTE CREEK 041
E ROSEBUD, Rosebud, MT
Built 2015 Load: 32.7 t ADT: 127
POWER RD
FairOver: RR 076
N EDGE COLSTRIP, Rosebud, MT
Built 1982 Load: 32.7 t ADT: 942
S 332
FairOver: DRAINAGE
11M N ASHLAND, Rosebud, MT
Built 1986 Load: 32.7 t ADT: 29
IRR
FairOver: TONGUE RIVER
ASHLAND, Rosebud, MT
Built 1970 Load: 32.7 t ADT: 1,083
UPPER RIVER RD
FairOver: ELK CREEK 048
2M SE HERON, Sanders, MT
Built 1992 Load: 32.7 t ADT: 100
BIG BEAVER CREEK R
FairOver: LITTLE BEAVER CREEK 018
11M NW THOMPSON FALLS, Sanders, MT
Built 1978 Load: 32.7 t ADT: 100
BIG BEAVER CREEK R
FairOver: BEAVER CREEK 019
12M NW THOMPSON FALLS, Sanders, MT
Built 1978 Load: 32.7 t ADT: 100
LIL THOMPSON R RD
FairOver: LITTLE THOMPSON RIV 091
19M N PLAINS, Sanders, MT
Built 1974 Load: 32.7 t ADT: 40
CHERRY CREEK RD
FairOver: PROSPECT CREEK 005
1M SW THOMPSON FALLS, Sanders, MT
Built 1973 Load: 32.7 t ADT: 100
HEWOLF DR
FairOver: VALLEY CREEK 015
7M SE DIXON, Sanders, MT
Built 1991 Load: 32.7 t ADT: 100
S 471 FH 7
FairOver: PROSPECT CREEK
14M W THOMPSON FALLS, Sanders, MT
Built 1979 Load: 32.7 t ADT: 135
S 471 FH 7
FairOver: COOPER CREEK
16M W THOMPSON FALLS, Sanders, MT
Built 1979 Load: 32.7 t ADT: 82
S 471 FH 7
FairOver: PROSPECT CREEK
18M W THOMPSON FALLS, Sanders, MT
Built 1979 Load: 32.7 t ADT: 82
DALEVIEW RD
FairOver: BIG MUDDY CREEK 020
5M N REDSTONE, Sheridan, MT
Built 1982 Load: 32.7 t ADT: 8
SOO LINE RD
FairOver: PLENTYWOOD CREEK 003
1M E OUTLOOK, Sheridan, MT
Built 1970 Load: 32.7 t ADT: 100
SOO LINE RD
FairOver: HARRY`S CREEK 071
3M W RAYMOND, Sheridan, MT
Built 1985 Load: 32.7 t ADT: 100
HENDRICKSON HILL R
FairOver: MCCOY CREEK 001
4M NW PLENTYWOOD, Sheridan, MT
Built 1994 Load: 32.7 t ADT: 100
NINE MILE RD
FairOver: HARRY`S CREEK 011
6M NW RAYMOND, Sheridan, MT
Built 1995 Load: 32.7 t ADT: 100
DALEVIEW RD
FairOver: BIG MUDDY CREEK 019
DALEVIEW, Sheridan, MT
Built 1992 Load: 32.7 t ADT: 100
DALEVIEW HILLS RD
FairOver: BIG MUDDY CREEK 005
1M N DALEVIEW, Sheridan, MT
Built 1983 Load: 32.7 t ADT: 100
DUTCH HENRY RD
FairOver: BEAVER CREEK 006
9M N REDSTONE, Sheridan, MT
Built 1982 Load: 32.7 t ADT: 100
COMERTOWN RD
FairOver: DRAINAGE 053
10M W WESTBY, Sheridan, MT
Built 1989 Load: 32.7 t ADT: 19
MARRON CREEK RD
FairOver: DRAINAGE 051
13M E PLENTYWOOD, Sheridan, MT
Built 1979 Load: 32.7 t ADT: 100
S DAGMAR RD
FairOver: COTTONWOOD CREEK 059
16M E MEDICINE LAKE, Sheridan, MT
Built 1970 Load: 32.7 t ADT: 100
S DAGMAR RD
FairOver: LAKE CREEK 058
15M E MEDICINE LAKE, Sheridan, MT
Built 1978 Load: 32.7 t ADT: 100
ROSE HILL RD
FairOver: NEISER CREEK 012
3M SE RESERVE, Sheridan, MT
Built 1950 Load: 32.7 t ADT: 100
Showing 2,601-2,650 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 |