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
LITTLE LAKE CR RD
FairOver: BIG HOLE RIVER 087
3M NW JACKSON, Beaverhead, MT
Built 1986 Load: 4.5 t ADT: 100
LIMA DAM RD
FairOver: RED ROCK RIVER 007
6M E LIMA, Beaverhead, MT
Built 1982 Load: 4.5 t ADT: 116
OLD STAGE RD
FairOver: CANYON DITCH
E BARRETTS INT, Beaverhead, MT
Built 1982 Load: 4.5 t ADT: 292
SAGE CREEK RD
FairOver: RED ROCK RIVER 034
1M N DELL, Beaverhead, MT
Built 1977 Load: 4.5 t ADT: 70
GRAVLEY RD
FairOver: RED ROCK RIVER 085
4M NW LIMA, Beaverhead, MT
Built 1982 Load: 4.5 t ADT: 61
ELLOAM RD
FairOver: BATTLE CREEK 018
25M N CHINOOK, Blaine, MT
Built 1991 Load: 4.5 t ADT: 100
MILLER ROAD
FairOver: FORT BELKNAP CANAL 057
7M NW HARLEM, Blaine, MT
Built 1923 Load: 4.5 t ADT: 100
RED LODGE CR RD
FairOver: VOLNEY CREEK 015
13M SW BOYD, Carbon, MT
Built 1991 Load: 4.5 t ADT: 100
MILES CITY CUTOFF
FairOver: LITTLE BEAVER CREEK 004
4M NW EKALAKA, Carter, MT
Built 1987 Load: 4.5 t ADT: 100
EAGLE CREEK RD
FairOver: EAGLE CREEK 005
8M SE FLAXVILLE, Daniels, MT
Built 1950 Load: 4.5 t ADT: 100
BRIDGE LN
FairOver: WARM SPRINGS CREEK 005
1M W ANACONDA, Deer Lodge, MT
Built 2001 Load: 4.5 t ADT: 100
OLD TOWN RD
FairOver: JEFFERSON RIVER 004
2M N THREE FORKS, Gallatin, MT
Built 1897 Load: 4.5 t ADT: 100
CHEVALLIER DR
FairOver: LITTLE PRICKLY PEAR 109
7M SW SIEBEN INT, Lewis and Clark, MT
Built 1905 Load: 4.5 t ADT: 37
MCDONALD LN
FairOver: LTL PRICKLY PEAR CRK 151
3M W CANYON CREEK, Lewis and Clark, MT
Built 1990 Load: 4.5 t ADT: 100
VUKONICH LN
FairOver: GRAVE CREEK 007
4M N FORTINE, Lincoln, MT
Built 1950 Load: 4.5 t ADT: 100
SUNDANCE BENCH RD
FairOver: MADISON RIVER 046
31M S ENNIS, Madison, MT
Built 1902 Load: 4.5 t ADT: 100
SIXTEENMILE RD
FairOver: SIXTEENMILE CREEK 044
18M SW RINGLING, Meagher, MT
Built 2022 Load: 4.5 t ADT: 100
COUNTY ROAD 055
FairOver: DODSON NORTH CANAL 013
W DODSON, Phillips, MT
Built 1986 Load: 4.5 t ADT: 5
NNN RD
FairOver: MCGINNIS CREEK 004
13M N INGOMAR, Rosebud, MT
Built 1986 Load: 4.5 t ADT: 100
LEE CREEK RD
FairOver: HANGING WOMAN CREEK 074
2M S BIRNEY, Rosebud, MT
Built 1940 Load: 4.5 t ADT: 100
LEE CREEK RD
FairOver: HANGING WOMAN CREEK 075
5M S BIRNEY, Rosebud, MT
Built 1981 Load: 4.5 t ADT: 100
TWIN BRIDGES RD
FairOver: ANTELOPE CREEK 055
1M E ANTELOPE, Sheridan, MT
Built 2008 Load: 4.5 t ADT: 100
RIVER RD
FairOver: IRRIGATION DITCH 020
2M W HYSHAM, Treasure, MT
Built 1978 Load: 4.5 t ADT: 17
ASHBOUGH TRAIL
FairOver: RED ROCK RIVER 086
KIDD, Beaverhead, MT
Built 1909 Load: 5.4 t ADT: 15
ANDERSON LN
FairOver: BEAVERHEAD RIVER 071
5M NE DILLON, Beaverhead, MT
Built 1930 Load: 5.4 t ADT: 53
N 7TH AVE-FRTG RD
FairOver: RR - MRL
BOZEMAN-N SEVENTH AVE, Gallatin, MT
Built 1993 Load: 5.4 t ADT: 6,077
ROOSEVELT PARKWAY
FairOver: KOOTENAI RIVER 070
E EDGE TROY, Lincoln, MT
Built 1912 Load: 5.4 t ADT: 100
COAL CAMP RD
FairOver: SHIELDS RIVER 015
8M NE WILSALL, Park, MT
Built 1975 Load: 5.4 t ADT: 100
INDIAN CREEK RD
FairOver: SHIELDS RIVER 027
2M S WILSALL, Park, MT
Built 1920 Load: 5.4 t ADT: 100
COTTONWOOD BENCH R
FairOver: COTTONWOOD CREEK 030
10M S WILSALL, Park, MT
Built 1908 Load: 5.4 t ADT: 100
PETROLIA BENCH RD
FairOver: MCDONALD CREEK 003
9M E WINNETT, Petroleum, MT
Built 1940 Load: 5.4 t ADT: 58
MAIN ST
FairOver: MCDONALD CREEK 015
WINNETT-MAIN ST, Petroleum, MT
Built 1940 Load: 5.4 t ADT: 98
BRIDGE RD
FairOver: MUSSELSHELL RIVER 001
15M NW SUMATRA, Rosebud, MT
Built 1930 Load: 5.4 t ADT: 100
SAND CREEK RD
FairOver: CARTERSVILLE CANAL 030
9M NE ROSEBUD, Rosebud, MT
Built 1935 Load: 5.4 t ADT: 100
LAUREL AIRPORT RD
FairOver: BIG DITCH 044
3M NE LAUREL, Yellowstone, MT
Built 1950 Load: 5.4 t ADT: 876
DEER CREEK TRLHD.
FairOver: GALLATIN RIVER
GALLATIN CANYON, Gallatin, MT
Built 1970 Load: 5.8 t ADT: 99
ROE LN
FairOver: RED ROCK 121
W RED ROCK, Beaverhead, MT
Built 1913 Load: 6.4 t ADT: 4
STEEL BRIDGE LN
FairOver: RED ROCK RIVER 084
4M NW LIMA, Beaverhead, MT
Built 1915 Load: 6.4 t ADT: 74
COUNTY ROAD 143
FairOver: UNNAMED CREEK 059
34M E DECKER, Big Horn, MT
Built 1950 Load: 6.4 t ADT: 100
BLUEWATER RD
FairOver: BLUEWATER CREEK 038
3M SE FROMBERG, Carbon, MT
Built 1915 Load: 6.4 t ADT: 100
WILLIAMS BR RD
FairOver: JEFFERSON RIVER 046
5M SW WILLOW CREEK, Gallatin, MT
Built 1898 Load: 6.4 t ADT: 85
HORSE CR RD
FairOver: SHIELDS RIVER 021
E WILSALL-HORSE CR RD, Park, MT
Built 1986 Load: 6.4 t ADT: 100
SPRING CREEK RD
FairOver: CABIN CREEK 011
13M NE MILDRED, Prairie, MT
Built 1933 Load: 6.4 t ADT: 100
PUMPHOUSE RD
FairOver: BIG HOLE RIVER 009
3M W DIVIDE, Silver Bow, MT
Built 1914 Load: 6.4 t ADT: 100
UPPER RD
FairOver: TWO LEGGIN`S CANAL 005
8M NW HARDIN, Big Horn, MT
Built 1950 Load: 7.3 t ADT: 100
COUNTY ROAD 544
FairOver: LOWER SEVEN MILE CR 013
13M SE BLOOMFIELD, Dawson, MT
Built 1975 Load: 7.3 t ADT: 100
PIONEER ROAD
FairOver: COYOTE CREEK
4 MILES SOUTHWEST OF DENT, Fergus, MT
Built 1979 Load: 7.3 t ADT: 100
NORTH LAKE MCDONAL
FairOver: MCDONALD CREEK
11.3 miles northeast of U, Flathead, MT
Built 1965 Load: 7.3 t ADT: 1,451
DRY CR SCHOOL RD
FairOver: E GALLATIN RIVER 032
3M E MANHATTAN, Gallatin, MT
Built 1924 Load: 7.3 t ADT: 100
ROAD 160 NORTH
FairOver: MILK RIVER 037
30M NW HAVRE, Hill, MT
Built 1938 Load: 7.3 t ADT: 100
Showing 701-750 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 |