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
LONGFELLOW RD
FairOver: LAKE CREEK 074
16M E ANTELOPE, Sheridan, MT
Built 1987 Load: 32.7 t ADT: 100
CHERRY CREEK RD
FairOver: DRAINAGE 052
10M SW WESTBY, Sheridan, MT
Built 1970 Load: 32.7 t ADT: 100
E ANTELOPE RD
FairOver: ANTELOPE CREEK 036
E ANTELOPE, Sheridan, MT
Built 1987 Load: 32.7 t ADT: 100
W RESERVE RD
FairOver: OTTER CREEK 038
14M S PLENTYWOOD, Sheridan, MT
Built 1970 Load: 32.7 t ADT: 42
SHIPPE CANYON RD
FairOver: OTTER CREEK 037
11M S PLENTYWOOD, Sheridan, MT
Built 1987 Load: 32.7 t ADT: 159
BOLSTER RD
FairOver: BIG MUDDY CREEK 029
6M SE REDSTONE, Sheridan, MT
Built 1970 Load: 32.7 t ADT: 30
BOLSTER RD
FairOver: WOLF CREEK 028
18M SE REDSTONE, Sheridan, MT
Built 1987 Load: 32.7 t ADT: 30
W LAKE RD
FairOver: MUDDY CR DIVERSION 045
W EDGE MEDICINE LAKE, Sheridan, MT
Built 1970 Load: 32.7 t ADT: 197
W LAKE RD
FairOver: WOLF CREEK 047
6M W MEDICINE LAKE, Sheridan, MT
Built 1977 Load: 32.7 t ADT: 68
BERGH RD
FairOver: WOLF CREEK 041
15M S REDSTONE, Sheridan, MT
Built 1977 Load: 32.7 t ADT: 27
W RESERVE RD
FairOver: WOLF CREEK 039
22M SW PLENTYWOOD, Sheridan, MT
Built 1976 Load: 32.7 t ADT: 100
SINGLETREE RD
FairOver: BIG MUDDY CREEK 034
4M SW ANTELOPE, Sheridan, MT
Built 1984 Load: 32.7 t ADT: 13
OLD MUDDY RD
FairOver: BIG MUDDY CREEK 033
1M NW ANTELOPE, Sheridan, MT
Built 1987 Load: 32.7 t ADT: 13
WHITTISH HILL RD
FairOver: BIG MUDDY CREEK 035
2M S ANTELOPE, Sheridan, MT
Built 1989 Load: 32.7 t ADT: 100
S ARCHER RD
FairOver: BIG MUDDY CREEK 015
9M W PLENTYWOOD, Sheridan, MT
Built 1985 Load: 32.7 t ADT: 46
MIDBY RD
FairOver: FORD CREEK 025
7M W PLENTYWOOD, Sheridan, MT
Built 1984 Load: 32.7 t ADT: 22
WHISKEY RD
FairOver: DRAINAGE 044
NW EDGE MEDICINE LAKE, Sheridan, MT
Built 1981 Load: 32.7 t ADT: 71
SILVER BOW RD
FairOver: SILVER BOW CREEK 014
3M W ROCKER, Silver Bow, MT
Built 2006 Load: 32.7 t ADT: 100
S ROCKER RD
FairOver: SILVER BOW CREEK 007
SE ROCKER, Silver Bow, MT
Built 1987 Load: 32.7 t ADT: 864
FAIRMONT RD
FairOver: SILVER BOW CREEK
10M NW ROCKER, Silver Bow, MT
Built 1980 Load: 32.7 t ADT: 548
SHIELDS AVE
FairOver: RR
BUTTE-SHIELDS AVE, Silver Bow, MT
Built 1958 Load: 32.7 t ADT: 6,492
COUNTRYMAN CR RD
FairOver: STILLWATER R OVFLOW 002
1M SW COLUMBUS, Stillwater, MT
Built 2006 Load: 32.7 t ADT: 100
YOUNGS POINT RD
FairOver: BIG DITCH 044
4M W PARK CITY, Stillwater, MT
Built 2004 Load: 32.7 t ADT: 100
I 90
FairOver: LOWER DEER CREEK
0.6M W GREYCLIFF, Sweet Grass, MT
Built 1980 Load: 32.7 t ADT: 6,415
I 90
FairOver: WORK CREEK
3.7M W REED POINT, Sweet Grass, MT
Built 1972 Load: 32.7 t ADT: 10,706
OLD US 10
FairOver: DRY CREEK 004
6M NW GREYCLIFF, Sweet Grass, MT
Built 1937 Load: 32.7 t ADT: 553
5TH LN NE
FairOver: GREENFIELD CANAL 043
7M NE FAIRFIELD, Teton, MT
Built 1988 Load: 32.7 t ADT: 100
PEEBLES RD
FairOver: TETON RIVER 064
10M NW CHOTEAU, Teton, MT
Built 1973 Load: 32.7 t ADT: 100
S 408
FairOver: USRS MAIN CANAL
4M SW FAIRFIELD, Teton, MT
Built 1953 Load: 32.7 t ADT: 349
FUHRMAN RD
FairOver: SNOW COULEE 021
16M S GLENTANA, Valley, MT
Built 1981 Load: 32.7 t ADT: 100
VANDALIA RD
FairOver: VANDALIA SOUTH CANAL 011
VANDALIA, Valley, MT
Built 1991 Load: 32.7 t ADT: 53
US 2
FairOver: MILK RIVER OVERFLOW
2M E HINSDALE, Valley, MT
Built 1966 Load: 32.7 t ADT: 1,313
BIG ELK RD
FairOver: BIG ELK CREEK 004
7M S TWO DOT, Wheatland, MT
Built 1974 Load: 32.7 t ADT: 100
FOSTER RD
FairOver: AMERICAN FORK CREEK 007
5M SE HARLOWTON, Wheatland, MT
Built 1982 Load: 32.7 t ADT: 100
LOWER N HILL RD
FairOver: ROBERTS CREEK 005
14M SE JUDITH GAP, Wheatland, MT
Built 1962 Load: 32.7 t ADT: 100
I 94
FairOver: DRAINAGE
1.2M E BALLENTINE, Yellowstone, MT
Built 1968 Load: 32.7 t ADT: 5,154
I 94
FairOver: SIAN HILL ROAD
6.2M E POMPEYS PILLAR, Yellowstone, MT
Built 1976 Load: 32.7 t ADT: 2,385
I 94
FairOver: SIAN HILL ROAD
6.2M E POMPEYS PILLAR, Yellowstone, MT
Built 1976 Load: 32.7 t ADT: 2,385
N 18TH RD
FairOver: ARROW CREEK 150
3M NE WORDEN, Yellowstone, MT
Built 1987 Load: 32.7 t ADT: 62
N 19TH RD
FairOver: ARROW CREEK 100
2M NE WORDEN, Yellowstone, MT
Built 1995 Load: 32.7 t ADT: 100
LOWER CANAL RD
FairOver: HUNTLEY MAIN CANAL 154
3 NE BALLANTINE, Yellowstone, MT
Built 1982 Load: 32.7 t ADT: 32
FLY CREEK RD
FairOver: FLY CREEK 140
1M SW POMPAY`S PILLAR, Yellowstone, MT
Built 1996 Load: 32.7 t ADT: 100
PRYOR RD
FairOver: HAMILTON CREEK 133
9M NE PRYOR, Yellowstone, MT
Built 1997 Load: 32.7 t ADT: 760
PRYOR RD
FairOver: PRYOR CREEK 010
15M S BILLINGS, Yellowstone, MT
Built 1979 Load: 32.7 t ADT: 760
PRYOR RD
FairOver: PRYOR CREEK 014
20M S BILLINGS, Yellowstone, MT
Built 2001 Load: 32.7 t ADT: 592
AQUI ESTA DR
FairOver: BLUE CREEK 124
4M SE BILLINGS, Yellowstone, MT
Built 1967 Load: 32.7 t ADT: 100
COLLEEN DR
FairOver: BLUE CREEK 125
3M SE BILLINGS, Yellowstone, MT
Built 1979 Load: 32.7 t ADT: 100
56TH ST W
FairOver: BIG DITCH 071
3M W BILLINGS, Yellowstone, MT
Built 1964 Load: 32.7 t ADT: 2,538
CANYON CREEK RD
FairOver: CANYON CREEK 042
9M NW LAUREL, Yellowstone, MT
Built 1965 Load: 32.7 t ADT: 100
MARKEGARD RD
FairOver: COVE DITCH 067
4M W LAUREL, Yellowstone, MT
Built 1986 Load: 32.7 t ADT: 100
Showing 2,651-2,700 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 |