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
CAMP CREEK RD
FairOver: CAMP CREEK 018
S AMSTERDAM, Gallatin, MT
Built 1986 Load: 13.6 t ADT: 100
DOME MOUNTAIN AVE
FairOver: PARMENTER CREEK 107
SW EDGE LIBBY, Lincoln, MT
Built 1960 Load: 13.6 t ADT: 100
ASSINIBOINE RD
FairOver: ASSINIBOINE CREEK 069
11M NW MALTA, Phillips, MT
Built 1982 Load: 13.6 t ADT: 100
OLD US HWY 2
FairOver: DODSON S. CNL SPLWAY 098
8M E MALTA, Phillips, MT
Built 1931 Load: 13.6 t ADT: 100
E LAKE RD
FairOver: LONE MAN COULEE
6M SE VALIER, Pondera, MT
Built 1975 Load: 13.6 t ADT: 122
HOWIE RD
FairOver: BIG TIMBER CREEK
1M NE BIG TIMBER, Sweet Grass, MT
Built 2004 Load: 13.6 t ADT: 481
BAYLOR RD
FairOver: MID FK PORCUPINE CR 013
15M S OPHEIM, Valley, MT
Built 1960 Load: 13.6 t ADT: 100
N BENCH RD
FairOver: WEST FORK POPLAR R 026
9M NE OPHEIM, Valley, MT
Built 1975 Load: 13.6 t ADT: 100
OSWALD RD
FairOver: RR 009
8M E BROADVIEW, Yellowstone, MT
Built 2009 Load: 13.6 t ADT: 100
FDR 839
FairOver: LOGGING CREEK
14 MI. WEST OF JCT US89, Cascade, MT
Built 1956 Load: 13.9 t ADT: 46
FDR #1205
FairOver: NO DATA ENTERED
GRANITE MOUNTAIN, Madison, MT
Built 1985 Load: 13.9 t ADT: 50
LONGMEADOW DR
FairOver: COVE DITCH 016
LAKESIDE ESTATES, Yellowstone, MT
Built 1991 Load: 13.9 t ADT: 100
IRR BIA RTE 14
FairOver: BIG SHOULDER CREEK
7.2KM SOUTH OF CROW AGNCY, Big Horn, MT
Built 1963 Load: 14.0 t ADT: 440
YENNE POINT RD
FairOver: DRAIN TO WOODS BAY 103
WOODS BAY, Lake, MT
Built 2008 Load: 14.2 t ADT: 100
FDR 1122
FairOver: BELT CREEK
0.1 MI W OF BELT CR. R.S., Cascade, MT
Built 1972 Load: 14.3 t ADT: 50
FDR 839
FairOver: LOGGING CREEK
13.5 MI. W. US89/839 JCT, Cascade, MT
Built 1956 Load: 14.3 t ADT: 46
S 205-FRONTAGE RD
FairOver: MADISON RIVER
1M E THREE FORKS, Gallatin, MT
Built 1948 Load: 14.3 t ADT: 1,473
FOREST LK. RD. 66
FairOver: W FK COTTONWOOD CREEK
4.5 MI SW CNTY-COTNWD JCT, Meagher, MT
Built 1969 Load: 14.3 t ADT: 50
FDR #204
FairOver: MOOSE CREEK
2.3 MI.NE OF JCT 119/204, Meagher, MT
Built 1956 Load: 14.3 t ADT: 50
W K GOLD CR RD
FairOver: WEST FORK GOLD CREEK
NO DATA ENTERED, Missoula, MT
Built 1997 Load: 14.3 t ADT: 50
NO DATA ENTERED
FairOver: NEZPERCE FK BTT
NO DATA ENTERED, Ravalli, MT
Built 1954 Load: 14.3 t ADT: 10
CARRIGAN LN
FairOver: EAST BENCH CANAL 061
4M E BARRETTS INT, Beaverhead, MT
Built 1962 Load: 14.5 t ADT: 100
BOYD COONEY DAM RD
FairOver: RED LODGE CREEK 013
COONEY RESERVOIR DAM, Carbon, MT
Built 1991 Load: 14.5 t ADT: 564
7TH LN
FairOver: GREENFIELD S CANAL 065
7M E FAIRFIELD, Cascade, MT
Built 1950 Load: 14.5 t ADT: 100
BISHOP CREEK RD
FairOver: SHONKIN CREEK 016
8M S SHONKIN, Chouteau, MT
Built 1930 Load: 14.5 t ADT: 100
ARNTZEN LN
FairOver: DOG CREEK
2M SE CHRISTINA, Fergus, MT
Built 2020 Load: 14.5 t ADT: 100
PACER COULEE RD
FairOver: DRY WOLF CREEK 093
4M SE DENTON, Fergus, MT
Built 1990 Load: 14.5 t ADT: 100
GIEFER CREEK RD
FairOver: GEIFER CREEK 095
18M W EAST GLACIER, Flathead, MT
Built 1976 Load: 14.5 t ADT: 100
TRUMAN CR RD
FairOver: TRUMAN CREEK 172
14M W KALISPELL, Flathead, MT
Built 2008 Load: 14.5 t ADT: 100
CONRAD RD
FairOver: STILLWATER RIVER
1M E KALISPELL, Flathead, MT
Built 1980 Load: 14.5 t ADT: 6,337
HART LN
FairOver: HELENA VALLEY CANAL 088
4M NE EAST HELENA, Lewis and Clark, MT
Built 1957 Load: 14.5 t ADT: 126
GLACIER CREEK RD
FairOver: GLACIER CREEK 061
0.5M W CONDON, Missoula, MT
Built 1970 Load: 14.5 t ADT: 100
CASTLE MOUNTAIN RD
FairOver: BRACKETT CREEK 032
2M S CLYDE PARK, Park, MT
Built 1970 Load: 14.5 t ADT: 100
HAMILTON ROAD
FairOver: SMITH CREEK
15M NE WILSALL, Park, MT
Built 2012 Load: 14.5 t ADT: 100
SHERMAN RD
FairOver: TETON RIVER 060
1M W CHOTEAU, Teton, MT
Built 1938 Load: 14.5 t ADT: 100
RIVERSIDE DR
FairOver: RICHARDSON COULEE 090
3M NW GLASGOW, Valley, MT
Built 1986 Load: 14.5 t ADT: 100
CO RD 002 FH 73
FairOver: WISE RIVER 017
22M S WISE RIVER, Beaverhead, MT
Built 1987 Load: 14.6 t ADT: 289
6035 SOLO JOE RD.
FairOver: E F YAAK
0.1 MILE FROM JCT WITH 92, Lincoln, MT
Built 1958 Load: 14.9 t ADT: 40
COTTONWOOD CRK. RD
FairOver: TRESPASS CREEK
NO DATA ENTERED, Park, MT
Built 1970 Load: 14.9 t ADT: 50
2-LANE ROAD
FairOver: WEST FORK ROCK CREEK
8 MILES WEST OF RED LODGE, Carbon, MT
Built 1965 Load: 15.2 t ADT: 50
FDR 204
FairOver: MOOSE CREEK
3.5 MI NE OF 119/204 JCT, Meagher, MT
Built 1956 Load: 15.2 t ADT: 50
IRR - I 90
FairOver: OWL CREEK
2.5M S LODGE GRASS, Big Horn, MT
Built 1985 Load: 15.4 t ADT: 1,978
PINE RIDGE RD
FairOver: TWO LEGGIN`S CANAL 014
4M NW HARDIN, Big Horn, MT
Built 1993 Load: 15.4 t ADT: 100
SHAW CUTOFF RD
FairOver: LITTLE MUDDY CREEK 126
12M NW CASCADE, Cascade, MT
Built 1933 Load: 15.4 t ADT: 100
LAS VEGAS LOOP
FairOver: RR 059
3M W FORT BENTON, Chouteau, MT
Built 1938 Load: 15.4 t ADT: 100
TYLER CUTOFF
FairOver: MCDONALD CREEK 125
1M S GRASSRANGE, Fergus, MT
Built 1975 Load: 15.4 t ADT: 100
US 87-E MAIN ST
FairOver: MILL DITCH
LEWISTOWN-E MAIN ST, Fergus, MT
Built 1922 Load: 15.4 t ADT: 8,688
W BRASSEY ST
FairOver: BIG SPRING CREEK
LEWISTOWN-W BRASSEY ST, Fergus, MT
Built 1920 Load: 15.4 t ADT: 1,899
BIGGS HAUGLAND RD
FairOver: DRY CREEK 079
2M S MENARD, Gallatin, MT
Built 1985 Load: 15.4 t ADT: 100
STAGECOACH TRL RD
FairOver: BAKER CREEK OVERFLOW 081
5M NW BELGRADE, Gallatin, MT
Built 1965 Load: 15.4 t ADT: 100
Showing 851-900 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 |