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
RD 763
PoorOver: FISHER RIVER
FISHER RIVER, Lincoln, MT
Built 1969 Load: 38.2 t ADT: 50
I 90
PoorOver: ANTELOPE CREEK
11.2M W DRUMMOND, Granite, MT
Built 1971 Load: 39.0 t ADT: 100
HWY 91 N
PoorOver: BEAVERHEAD RIVER 033
1M N DILLON, Beaverhead, MT
Built 1946 Load: 39.5 t ADT: 2,660
48TH ST W
PoorOver: BEAVER CREEK 046
2M SW HAVRE, Hill, MT
Built 1966 Load: 39.9 t ADT: 100
IRR - US 2
PoorOver: DRAINAGE
1M W DODSON, Phillips, MT
Built 1973 Load: 39.9 t ADT: 1,283
RD 36
PoorOver: WOLF CR
WOLF CREEK MP 2.6, Lincoln, MT
Built 1969 Load: 40.5 t ADT: 50
US 191
PoorOver: S FORK AMERICAN FORK
11M S HARLOWTON, Wheatland, MT
Built 1941 Load: 40.8 t ADT: 702
RED BARN RD
PoorOver: LITTLE BITTERROOT RV 064
8M NE HOT SPRINGS, Lake, MT
Built 1960 Load: 41.8 t ADT: 100
NO DATA ENTERED
PoorOver: DALY CR
NO DATA ENTERED, Ravalli, MT
Built 1958 Load: 42.1 t ADT: 5
S 23
PoorOver: YELLOWSTONE RIVER
2M S SIDNEY, Richland, MT
Built 1994 Load: 42.6 t ADT: 2,423
MULLAN RD
PoorOver: IRRIGATION CANAL
6M SE FRENCHTOWN, Missoula, MT
Built 1970 Load: 43.5 t ADT: 1,605
STAGE RD
PoorOver: BIG WARM CREEK 027
24M S DODSON, Phillips, MT
Built 2004 Load: 43.5 t ADT: 100
IRR BIA RTE 1012
PoorOver: DRY CREEK CANAL
9 KM S.E. OF ST. IGNATIUS, Lake, MT
Built 1975 Load: 45.5 t ADT: 50
S 5TH AVE E
PoorOver: DODSON SOUTH CANAL 131
SE MALTA, Phillips, MT
Built 1986 Load: 49.0 t ADT: 100
S.FK.YAAK/PIPE CR.
PoorOver: YAAK RIVER
JCT 68/92, TOWN OF YAAK., Lincoln, MT
Built 1951 Load: 54.1 t ADT: 99
BATTLEFIELD ROAD
PoorOver: MEDICINE TAIL COULEE
I-90, EXIT 510, EAST ON U, Big Horn, MT
Built 1938 Load: 83.4 t ADT: 150
S 16
PoorOver: CRANE CREEK
CRANE, Richland, MT
Built 1957 Load: 89.8 t ADT: 2,766
ROAD 261
PoorOver: CRACKERBOX CREEK 043
16M SW GLENDIVE, Dawson, MT
Built 1997 Load: 99.9 t ADT: 21
CABIN CREEK LOOP
PoorOver: CABIN CREEK 057
22M N PLEVNA, Fallon, MT
Built 1980 Load: 99.9 t ADT: 30
SCHAEFER RD
PoorOver: PABLO FEEDER CANAL 086
4M SE POLSON, Lake, MT
Built 1985 Load: 99.9 t ADT: 100
IRR - US 2
PoorOver: CHELSEA CREEK
12M E WOLF POINT, Roosevelt, MT
Built 1960 Load: 99.9 t ADT: 2,359
IRR - US 2
PoorOver: DRAINAGE
3M E POPLAR, Roosevelt, MT
Built 1970 Load: 99.9 t ADT: 1,577
Showing 5,101-5,122 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.