Total Bridges
5,122
Public highway bridges in Montana
State profile · Near median Poor share
Montana bridge safety
Condition ratings, load ratings, and Poor-condition data for every public highway bridge in Montana, based on the FHWA National Bridge Inventory.
- 5,122
- Public bridges
- 28.3%
- Good condition
- 6.7%
- Poor condition
Data updated May 2026
Good Condition
28.3%
1,447 bridges rated 7-9
-21.7pp vs 50% benchmark
Poor Condition
6.7%
343 bridges whose lowest applicable component is rated 0-4
-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 - Poor-condition share 22.3%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
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 by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Montana on the same metric.
NC
North Carolina
6.16% top marginal rate
HI
Hawaii
6.47% top marginal rate
MT
Montana
6.70% top marginal rate
NY
New York
6.90% top marginal rate
KY
Kentucky
7.06% top marginal rate
Bridges Needing Most Attention in Montana
Six lowest-condition bridges in Montana, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
HWY 91 N
PoorOver: BIG HOLE RIVER 041
22M N DILLON, Beaverhead, MT
Built 1940 Load: 2.7 t ADT: 155
SLEEPY HOLLOW LN
PoorOver: 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
PoorOver: SHEEP CREEK 097
12M S CASCADE, Cascade, MT
Built 1950 Load: 3.6 t ADT: 68
All Bridges in Montana
I 15
FairOver: RR (TRACKS NOT IN USE)
BUTTE, Silver Bow, MT
Built 1966 Load: 35.3 t ADT: 2,113
I 15 FRONTAGE RD
FairOver: BEAVERHEAD R-INT RAMP
8M N CLARK CANYON DAM, Beaverhead, MT
Built 1988 Load: 35.4 t ADT: 100
S 89
FairOver: BLACKTAIL CREEK
SOUTH DILLON, Beaverhead, MT
Built 1983 Load: 35.4 t ADT: 1,770
US 287
FairOver: MILLIGAN CREEK
6M SW THREE FORKS, Broadwater, MT
Built 1968 Load: 35.4 t ADT: 1,524
I 15
FairOver: RR-MISSOURI RIVER
8M S CASCADE, Cascade, MT
Built 1968 Load: 35.4 t ADT: 2,224
I 15
FairOver: RR-MISSOURI RIVER
8M S CASCADE, Cascade, MT
Built 1968 Load: 35.4 t ADT: 2,224
9TH ST N
FairOver: MISSOURI RIVER
GREAT FALLS-9TH-10 ST N, Cascade, MT
Built 1996 Load: 35.4 t ADT: 15,478
S 511
FairOver: WHITETAIL CREEK
WHITETAIL, Daniels, MT
Built 2004 Load: 35.4 t ADT: 131
S 16
FairOver: THIRTEEN MILE CREEK
1M SW INTAKE, Dawson, MT
Built 1969 Load: 35.4 t ADT: 2,216
US 12
FairOver: TIMBER CREEK
5M W BAKER, Fallon, MT
Built 1998 Load: 35.4 t ADT: 820
CIMRHAKL RD
FairOver: SACAGAWEA RIV 114
8M NE ROY, Fergus, MT
Built 1978 Load: 35.4 t ADT: 100
OBRYAN LN
FairOver: MILL CREEK 012
1M SE CRESTON, Flathead, MT
Built 2000 Load: 35.4 t ADT: 100
IRR - US 2
FairOver: STILLWATER RIVER
1M NE KALISPELL, Flathead, MT
Built 1966 Load: 35.4 t ADT: 13,399
I 90
FairOver: RR
4.3M E BOZEMAN, Gallatin, MT
Built 2006 Load: 35.4 t ADT: 9,533
I 90
FairOver: RR
4.3M E BOZEMAN, Gallatin, MT
Built 2006 Load: 35.4 t ADT: 9,533
S 1
FairOver: RR
DRUMMOND, Granite, MT
Built 1966 Load: 35.4 t ADT: 1,329
HUBBARD LN
FairOver: BOULDER RIVER 031
4M S BOULDER, Jefferson, MT
Built 2001 Load: 35.4 t ADT: 100
S 359
FairOver: JEFFERSON RIVER SLOUGH
CARDWELL, Jefferson, MT
Built 1968 Load: 35.4 t ADT: 985
3RD AVE W
FairOver: OTTER CREEK 036
RAYNESFORD, Judith Basin, MT
Built 1930 Load: 35.4 t ADT: 100
THERESA ADAMS LN
FairOver: JOCKO RIVER 057
2M E ARLEE, Lake, MT
Built 1978 Load: 35.4 t ADT: 100
COUNTY ROAD 811
FairOver: TEN MILE CREEK 131
W EDGE OF HELENA, Lewis and Clark, MT
Built 2005 Load: 35.4 t ADT: 100
S 24
FairOver: TIMBER CREEK
5M N FLOWING WELLS, McCone, MT
Built 1960 Load: 35.4 t ADT: 134
I 90
FairOver: ST. REGIS RVR-LOCAL RD
4.3M E DE BORGIA, Mineral, MT
Built 1979 Load: 35.4 t ADT: 7,352
S 200
FairOver: BLACKFOOT RIVER
10M NE POTOMAC, Missoula, MT
Built 1947 Load: 35.4 t ADT: 3,825
MULLAN RD
FairOver: FRENCH DITCH
5M W MISSOULA, Missoula, MT
Built 1982 Load: 35.4 t ADT: 3,120
ANDERSON RD
FairOver: SHIELDS RIVER 014
10M NE WILSALL, Park, MT
Built 1979 Load: 35.4 t ADT: 100
US 2
FairOver: BEAVER CREEK OVERFLOW
7M W SACO, Phillips, MT
Built 1968 Load: 35.4 t ADT: 1,250
S 243
FairOver: STINKY CREEK
9M NW SACO, Phillips, MT
Built 2003 Load: 35.4 t ADT: 39
S 243
FairOver: DRAINAGE
1M N SACO, Phillips, MT
Built 1936 Load: 35.4 t ADT: 252
I 90
FairOver: CLARK FORK RIVER
1.2M S DEER LODGE, Powell, MT
Built 1961 Load: 35.4 t ADT: 4,928
SKALKAHO HWY
FairOver: REPUBLICAN DITCH 063
3M S HAMILTON, Ravalli, MT
Built 1941 Load: 35.4 t ADT: 3,082
MID BURNT FORK RD
FairOver: NORTH BURNT FORK CR 022
4M SE STEVENSVILLE, Ravalli, MT
Built 1970 Load: 35.4 t ADT: 100
US 93
FairOver: S FORK BEAR CREEK
2M S VICTOR, Ravalli, MT
Built 2011 Load: 35.4 t ADT: 13,545
US 93
FairOver: MCCALLA CREEK
6M N VICTOR, Ravalli, MT
Built 2008 Load: 35.4 t ADT: 12,937
S 200
FairOver: FIRST HAY CREEK
3M SW FAIRVIEW, Richland, MT
Built 1986 Load: 35.4 t ADT: 4,273
S 16
FairOver: CLOVER CREEK-RR
CULBERTSON, Roosevelt, MT
Built 1957 Load: 35.4 t ADT: 1,079
S 5
FairOver: EAGLE CREEK
REDSTONE, Sheridan, MT
Built 2011 Load: 35.4 t ADT: 321
S 5
FairOver: BIG MUDDY CREEK
3M SE REDSTONE, Sheridan, MT
Built 2012 Load: 35.4 t ADT: 508
COUNTRYMAN CR RD
FairOver: STILLWATER RIVER 003
1M SW COLUMBUS, Stillwater, MT
Built 1988 Load: 35.4 t ADT: 100
TWO DOT HWY
FairOver: MUSSELSHELL RIVER 017
N EDGE TWO DOT, Wheatland, MT
Built 1965 Load: 35.4 t ADT: 100
TRUCK ROUTE RD
FairOver: YATES CREEK 003
EAST WIBAUX, Wibaux, MT
Built 1939 Load: 35.4 t ADT: 53
S SHILOH RD
FairOver: BBWA CANAL
2M W BILLINGS, Yellowstone, MT
Built 2000 Load: 35.4 t ADT: 12,427
FOREST ROAD
FairOver: TIGER CREEK
ROAD 38, Flathead, MT
Built 1965 Load: 35.6 t ADT: 200
NO DATA ENTERED
FairOver: ROSS FORK
ROSS FORK, Granite, MT
Built 1967 Load: 35.6 t ADT: 50
NO DATA ENTERED
FairOver: ST REGIS RIVER
NO DATA ENTERED, Mineral, MT
Built 1900 Load: 35.6 t ADT: 50
MAIN ST
FairOver: CLARK FORK RIVER
S DEER LODGE, Powell, MT
Built 1949 Load: 35.6 t ADT: 2,287
BRACKETT CR RD
FairOver: BRACKETT CREEK 121
19M N BOZEMAN, Gallatin, MT
Built 1989 Load: 35.7 t ADT: 257
FLAT CREEK ROAD
FairOver: SUTTON CREEK
SUTTON CREEK, Lincoln, MT
Built 1980 Load: 36.0 t ADT: 40
SPOOK LAKE RD
FairOver: OWL CREEK
SPOOK LAKE, Missoula, MT
Built 1980 Load: 36.0 t ADT: 50
IRR BIA RTE 30
FairOver: MAIN CANAL
7.2 KM SW OF OSWEGO, Valley, MT
Built 1983 Load: 36.0 t ADT: 225
Showing 2,851-2,900 of 5,122 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.