Yellowstone County, MT

283 public highway bridges

Yellowstone County Bridge Snapshot

Yellowstone County, Montana contains 283 public highway bridges in the FHWA National Bridge Inventory. Roughly 28.3% are rated “Good,” 46.3% “Fair,” 1.1% “Poor,” and 1.1% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in MT are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

283
Total Bridges
28.3%
Good
1.1%
Poor
1.1%
Structurally Deficient

Condition Distribution

Good
28.3% (80)
Fair
46.3% (131)
Poor
1.1% (3)
SD
1.1% (3)

All Bridges (283)

BRIARWOOD BLVD

Good

Over: BLUE CR-GOLF PATH 121

3M SE BILLINGS, Yellowstone, MT

Built 1979 Load: 32.7 t ADT: 100

S 64TH ST W

Good

Over: CANYON CREEK 048

8M NE LAUREL, Yellowstone, MT

Built 1967 Load: 32.7 t ADT: 876

S 48TH ST W

Good

Over: CANYON CREEK 106

2M SW BILLINGS, Yellowstone, MT

Built 1970 Load: 32.7 t ADT: 1,146

S 48TH ST W

Good

Over: BBWA CANAL 107

7M NE LAUREL, Yellowstone, MT

Built 2003 Load: 32.7 t ADT: 1,146

CANYON CREEK RD

Good

Over: CANYON CREEK 185

9M NW LAUREL, Yellowstone, MT

Built 1996 Load: 32.7 t ADT: 100

BENEDICT GULCH RD

Good

Over: COVE DITCH 046

5M W LAUREL, Yellowstone, MT

Built 1996 Load: 32.7 t ADT: 67

N HART RD

Good

Over: BIG DITCH 065

4M W LAUREL, Yellowstone, MT

Built 1994 Load: 32.7 t ADT: 100

S LAUREL RD

Good

Over: BBWA CANAL 028

3M E LAUREL, Yellowstone, MT

Built 2002 Load: 32.7 t ADT: 100

ALEXANDER RD

Good

Over: BBWA CANAL 077

5M N BILLINGS, Yellowstone, MT

Built 1998 Load: 32.7 t ADT: 100

HOMER DAVIS RD

Good

Over: BBWA CANAL 095

6M SW SHEPHERD, Yellowstone, MT

Built 2000 Load: 32.7 t ADT: 100

SCANDIA RD

Good

Over: RAZOR CREEK 092

3M NE SHEPHERD, Yellowstone, MT

Built 2005 Load: 32.7 t ADT: 100

12 MILE ROAD

Good

Over: 12 MILE CREEK 197

3M SW SHEPHERD, Yellowstone, MT

Built 2005 Load: 32.7 t ADT: 100

OLD HWY 312

Good

Over: BBWA CANAL 166

4M NE BILLINGS, Yellowstone, MT

Built 2005 Load: 32.7 t ADT: 11,193

11TH ST W

Good

Over: BBWA CANAL 047

BILLINGS-11TH ST W, Yellowstone, MT

Built 2007 Load: 32.7 t ADT: 100

S 32ND ST W

Good

Over: BBWA CANAL 115

2M SW BILLINGS, Yellowstone, MT

Built 2004 Load: 32.7 t ADT: 2,993

ARONSON AVE

Good

Over: ALKALI CREEK 202

BILLINGS-ARONSON AVE, Yellowstone, MT

Built 2008 Load: 32.7 t ADT: 10,054

INNER BELT LOOP

Good

Over: ALKALI CREEK 208

3M NW BILLINGS, Yellowstone, MT

Built 2014 Load: 32.7 t ADT: 1,171

VALLEY DR

Good

Over: BIG DITCH 111

LAUREL-VALLEY DR, Yellowstone, MT

Built 2008 Load: 32.7 t ADT: 931

VIRGINIA LN

Good

Over: BBWA CANAL

BILLINGS-VIRGINIA LN, Yellowstone, MT

Built 1988 Load: 32.7 t ADT: 4,048

BLUE CREEK RD

Good

Over: BLUE CREEK

2M S BILLINGS, Yellowstone, MT

Built 1972 Load: 33.6 t ADT: 9,171

CANE ST

Good

Over: FLY CREEK 136

POMPEY`S PILLAR, Yellowstone, MT

Built 1976 Load: 34.5 t ADT: 100

ALKALI CREEK ROAD

Good

Over: ALKALI CREEK

1M N BILLINGS, Yellowstone, MT

Built 2021 Load: 35.4 t ADT: 989

I 90

Good

Over: YELLOWSTONE RIVER

BILLINGS, Yellowstone, MT

Built 2022 Load: 36.3 t ADT: 14,315

LOST TRAIL ROAD

Good

Over: CANYON CREEK

10.2 MILES NW LAUREL, Yellowstone, MT

Built 2020 Load: 39.0 t ADT: 100

FRONTAGE ROAD 683

Good

Over: BBWA CANAL 032

2M E LAUREL, Yellowstone, MT

Built 1965 Load: 39.0 t ADT: 3,060

OLD HWY 312

Good

Over: FIVE MILE CREEK 183

3M NE BILLINGS, Yellowstone, MT

Built 2005 Load: 41.7 t ADT: 11,193

BUTTERFLY LAKE LN

Good

Over: BBWA CANAL 196

BILLINGS-BUTTERFLY LAKE L, Yellowstone, MT

Built 2004 Load: 43.5 t ADT: 100

MULLOWNEY LN

Good

Over: RR

BILLINGS-MULLOWNEY LN, Yellowstone, MT

Built 2007 Load: 44.5 t ADT: 20,106

BLUE CREEK RD

Good

Over: BLUE CREEK

7M S BILLINGS, Yellowstone, MT

Built 1982 Load: 78.9 t ADT: 796

S 3

Good

Over: NORTH FORK ALKALI CREEK

8M NW BILLINGS, Yellowstone, MT

Built 1992 Load: 89.8 t ADT: 2,553

ANITA RES ACC RD

Poor

Over: Anita Dam Spillway

7.2 mi E-SE of Ballantine, Yellowstone, MT

Built 1937 Load: 3.6 t ADT: 10

OLD US 10

Poor

Over: BIG DITCH 051

4M W LAUREL, Yellowstone, MT

Built 1932 Load: 20.0 t ADT: 2,474

OLD HWY 312

Poor

Over: YELLOWSTONE RIVER 170

HUNTLEY, Yellowstone, MT

Built 1949 Load: 23.6 t ADT: 3,981

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial