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
US 191 FH 45
FairOver: COUGAR CREEK
7M N WEST YELLOWSTONE, Gallatin, MT
Built 1964 Load: 34.5 t ADT: 3,257
US 191 FH 42
FairOver: SWAN CREEK
12M NE BIG SKY, Gallatin, MT
Built 2009 Load: 34.5 t ADT: 8,666
E VALLEY CENTER RD
FairOver: HYALITE CREEK
3M NW BOZEMAN, Gallatin, MT
Built 2011 Load: 34.5 t ADT: 6,077
DRY CREEK RD
FairOver: REESE CREEK
4M N BELGRADE, Gallatin, MT
Built 1957 Load: 34.5 t ADT: 2,093
IRR - US 2
FairOver: MIDVALE CREEK
EAST GLACIER, Glacier, MT
Built 2001 Load: 34.5 t ADT: 1,836
S FERNDALE DR
FairOver: SWAN RIVER 102
2M SE FERNDALE, Lake, MT
Built 2007 Load: 34.5 t ADT: 100
JOHNNY RIDGE RD
FairOver: MADISON RIVER 001
7M S CAMERON, Madison, MT
Built 1967 Load: 34.5 t ADT: 409
S 359
FairOver: SOUTH BOULDER RIVER
3M S JEFFERSON ISLAND, Madison, MT
Built 1958 Load: 34.5 t ADT: 1,402
US 12
FairOver: FLAGSTAFF CREEK
2M E CHECKERBOARD, Meagher, MT
Built 2012 Load: 34.5 t ADT: 341
RIVER ST N
FairOver: CLARK FORK 003
SUPERIOR-RIVER ST N, Mineral, MT
Built 1972 Load: 34.5 t ADT: 2,332
BUSINESS RTE 90
FairOver: YELLOWSTONE RIVER
NE LIVINGSTON, Park, MT
Built 2013 Load: 34.5 t ADT: 5,035
US 2
FairOver: DODSON SOUTH CANAL
12M W SACO, Phillips, MT
Built 1966 Load: 34.5 t ADT: 1,294
S WAGNER ROAD
FairOver: MILK RIVER
1M S WAGNER, Phillips, MT
Built 2000 Load: 34.5 t ADT: 79
I 94
FairOver: RR
3M E TERRY, Prairie, MT
Built 1969 Load: 34.5 t ADT: 1,914
I 94
FairOver: RR
3M E TERRY, Prairie, MT
Built 1969 Load: 34.5 t ADT: 1,914
OLD HWY 10 W
FairOver: CONN`S COULEE 021
3M SW TERRY, Prairie, MT
Built 1930 Load: 34.5 t ADT: 504
US 93
FairOver: SKALKAHO CREEK
2M S HAMILTON, Ravalli, MT
Built 1984 Load: 34.5 t ADT: 10,223
BELL CROSSING
FairOver: BITTERROOT RIVER OVERFLO
3M S STEVENSVILLE, Ravalli, MT
Built 1974 Load: 34.5 t ADT: 2,762
COUNTY ROAD 307
FairOver: BENNIE PEER CREEK 021
7M E SIDNEY, Richland, MT
Built 1997 Load: 34.5 t ADT: 100
S 16-S CENTRAL AVE
FairOver: LONE TREE CREEK
SIDNEY-S CENTRAL AVE, Richland, MT
Built 1974 Load: 34.5 t ADT: 8,550
AIRPORT RD
FairOver: LONE TREE CREEK
SIDNEY-AIRPORT RD, Richland, MT
Built 1999 Load: 34.5 t ADT: 1,031
US-2
FairOver: CLOVER CREEK
1M E CULBERTSON, Roosevelt, MT
Built 2020 Load: 34.5 t ADT: 1,568
US 2
FairOver: CLOVER CREEK
5M E CULBERTSON, Roosevelt, MT
Built 1967 Load: 34.5 t ADT: 1,242
IRR - S 13
FairOver: TULE CREEK
11M NE WOLF POINT, Roosevelt, MT
Built 1991 Load: 34.5 t ADT: 366
S 566-TONGUE R RD
FairOver: TONGUE RIVER
31M SW ASHLAND, Rosebud, MT
Built 1980 Load: 34.5 t ADT: 44
S 374-OUTLOOK HWY
FairOver: DRAINAGE
2M S OUTLOOK, Sheridan, MT
Built 1955 Load: 34.5 t ADT: 151
S 78
FairOver: WHITEBIRD CREEK
6M NE ABSAROKEE, Stillwater, MT
Built 2007 Load: 34.5 t ADT: 2,305
NYE RD-S 419
FairOver: WEST ROSEBUD CREEK
FISHTAIL, Stillwater, MT
Built 1991 Load: 34.5 t ADT: 1,055
US 191
FairOver: BIG TIMBER CREEK
2M N BIG TIMBER, Sweet Grass, MT
Built 1997 Load: 34.5 t ADT: 1,333
PENDROY RD
FairOver: FARMER`S COULEE
1M E PENDROY, Teton, MT
Built 1949 Load: 34.5 t ADT: 168
SKYLARK RD
FairOver: CHERRY CREEK 093
3M N GLASGOW, Valley, MT
Built 2012 Load: 34.5 t ADT: 100
US 2
FairOver: BEAR CREEK
9M E HINSDALE, Valley, MT
Built 1996 Load: 34.5 t ADT: 1,148
2ND AVE S-TAMPICO
FairOver: CHERRY CREEK
W EDGE OF GLASGOW, Valley, MT
Built 1989 Load: 34.5 t ADT: 478
US 12
FairOver: HAYMAKER CREEK
N TWO DOT, Wheatland, MT
Built 1966 Load: 34.5 t ADT: 554
MAILBOX RD
FairOver: BBWA CANAL 087
7M NW SHEPHERD, Yellowstone, MT
Built 1967 Load: 34.5 t ADT: 100
CUSTER FRTG RD
FairOver: AUTOMATIC CREEK 036
10M SW CUSTER, Yellowstone, MT
Built 1951 Load: 34.5 t ADT: 118
IRR - I 90
FairOver: LITTLE BIGHORN RIVER
0.6M S CROW AGENCY, Big Horn, MT
Built 1949 Load: 34.7 t ADT: 3,503
S 9TH ST-ISLAND DR
FairOver: YELLOWSTONE RIVER 070
LIVINGSTON-S 9TH ST, Park, MT
Built 2011 Load: 34.7 t ADT: 100
TAMPICO RD N
FairOver: MILK RIVER 094
N TAMPICO, Valley, MT
Built 2002 Load: 34.7 t ADT: 100
ROAD 169
FairOver: RACETRACK CR
1 MILE BEFORE CAMPGROUND, Deer Lodge, MT
Built 1981 Load: 35.0 t ADT: 50
NO DATA ENTERED
FairOver: MIDDLE FORK ROCK CR
BEFORE KAISER LAKE, Granite, MT
Built 1965 Load: 35.0 t ADT: 40
6761
FairOver: FISHER RIVER
HOUGHTON CREEK, Lincoln, MT
Built 1986 Load: 35.0 t ADT: 20
W.FK.MILL CREEK RD
FairOver: WEST FORK MILL CREEK
S. OF LIVINGSTON, Park, MT
Built 1971 Load: 35.0 t ADT: 50
NO DATA ENTERED
FairOver: EAST FK BULL RIVER
NO DATA ENTERED, Sanders, MT
Built 1963 Load: 35.0 t ADT: 30
NO DATA ENTERED
FairOver: BEEFSTRAIGHT CR
NO DATA ENTERED, Silver Bow, MT
Built 1963 Load: 35.0 t ADT: 50
SERIGHT RD
FairOver: ROCK CREEK 045
3M E MOORE, Fergus, MT
Built 1962 Load: 35.3 t ADT: 100
NO DATA ENTERED
FairOver: WEST FORK ROCK CR
WEST FORK ROCK CR, Granite, MT
Built 1969 Load: 35.3 t ADT: 40
NO DATA ENTERED
FairOver: BOWLES CR
BOWLES CR, Granite, MT
Built 1971 Load: 35.3 t ADT: 50
FRONTAGE RD E 448
FairOver: GREELEY CREEK 017
5M W SPRINGDALE, Park, MT
Built 1987 Load: 35.3 t ADT: 70
NO DATA ENTERED
FairOver: NEZPERCE FK
NO DATA ENTERED, Ravalli, MT
Built 1972 Load: 35.3 t ADT: 10
Showing 2,801-2,850 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 |