Deer Lodge County, MT

68 public highway bridges

Deer Lodge County Bridge Snapshot

Deer Lodge County, Montana contains 68 public highway bridges in the FHWA National Bridge Inventory. Roughly 23.5% are rated “Good,” 58.8% “Fair,” 5.9% “Poor,” and 5.9% 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.

68

Total Bridges

23.5%

Good

5.9%

Poor

5.9%

Structurally Deficient

Condition Distribution

Good

23.5% (16)

Fair

58.8% (40)

Poor

5.9% (4)

SD

5.9% (4)

All Bridges (68)

Sort:

I 90

Over: INT GALEN

3.7M N WARM SPRINGS, Deer Lodge, MT

Built 1978 ADT: 100

I 90

Over: INT GALEN

3.7M N WARM SPRINGS, Deer Lodge, MT

Built 1978 ADT: 100

I 90

Over: SEP PERKINS LANE

1.9M N WARM SPRINGS, Deer Lodge, MT

Built 1978 ADT: 100

I 90

Over: SEP HUFFMAN LANE

1.9M N WARM SPRINGS, Deer Lodge, MT

Built 1978 ADT: 100

I 90

Over: INT WARM SPRINGS

WARM SPRINGS, Deer Lodge, MT

Built 1978 ADT: 1,660

I 90

Over: INT WARM SPRINGS

WARM SPRINGS, Deer Lodge, MT

Built 1978 ADT: 100

STEWART ST

Over: SEP I 90 003

5M S WARM SPRINGS, Deer Lodge, MT

Built 1964 ADT: 5,053

S 1

Over: INT I 90

6M S WARM SPRINGS, Deer Lodge, MT

Built 1964 ADT: 10,105

BRIDGE LN

Over: WARM SPRINGS CREEK 005

1M W ANACONDA, Deer Lodge, MT

Built 2001 Load: 4.5 t ADT: 100

MAPLE STREET

Over: WARM SPRINGS CREEK 011

ANACONDA-MAPLE ST, Deer Lodge, MT

Built 1960 Load: 9.1 t ADT: 100

SYCAMORE STREET

Over: WARM SPRINGS CREEK 009

ANACONDA-SYCAMORE ST, Deer Lodge, MT

Built 1960 Load: 10.0 t ADT: 448

S 569

Over: MILL CREEK 040

4M SE ANACONDA, Deer Lodge, MT

Built 1950 Load: 17.2 t ADT: 562

S 569

Over: FRENCH CREEK 043

21M SW ANACONDA, Deer Lodge, MT

Built 1950 Load: 20.0 t ADT: 288

NO DATA ENTERED

Over: DEEP CREEK

DEEP CREEK, Deer Lodge, MT

Built 1966 Load: 21.1 t ADT: 75

S 1

Over: SILVER BOW CREEK

6M SW WARM SPRINGS, Deer Lodge, MT

Built 1964 Load: 21.8 t ADT: 4,553

S 1

Over: SILVER BOW CREEK

6M SW WARM SPRINGS, Deer Lodge, MT

Built 1964 Load: 21.8 t ADT: 4,553

S 43

Over: BIG HOLE RIVER

16M NE WISDOM, Deer Lodge, MT

Built 1960 Load: 22.7 t ADT: 330

NO DATA ENTERED

Over: W FK FISHTRAP

W FK FISHTRAP, Deer Lodge, MT

Built 1973 Load: 23.3 t ADT: 20

S 1 FH 17

Over: WARM SPRINGS CREEK

7M W ANACONDA, Deer Lodge, MT

Built 1930 Load: 24.4 t ADT: 2,043

FRONTAGE ROAD 146

Over: WILLOW CREEK 033

4M S WARM SPRINGS, Deer Lodge, MT

Built 1931 Load: 25.4 t ADT: 100

S 1

Over: WARM SPRINGS CREEK

1M W ANACONDA, Deer Lodge, MT

Built 1990 Load: 25.4 t ADT: 4,724

NO DATA ENTERED

Over: JERRY CREEK

JERRY CR, Deer Lodge, MT

Built 1965 Load: 25.6 t ADT: 50

S 48

Over: WARM SPRINGS CREEK

WARM SPRINGS, Deer Lodge, MT

Built 1931 Load: 26.2 t ADT: 1,660

I 90

Over: CLARK FORK RIVER

2.5M N OPPORTUNITY, Deer Lodge, MT

Built 1978 Load: 26.3 t ADT: 5,053

FRONTAGE ROAD 146

Over: CLARK FORK RIVER 034

4M S WARM SPRINGS, Deer Lodge, MT

Built 1931 Load: 26.3 t ADT: 100

FRONTAGE ROAD 146

Over: DRAINAGE 025

4M S WARM SPRINGS, Deer Lodge, MT

Built 1931 Load: 26.3 t ADT: 100

I 90

Over: WARM SPRINGS-WB INT RAMP

WARM SPRINGS, Deer Lodge, MT

Built 1978 Load: 27.2 t ADT: 98

FRONTAGE ROAD 011

Over: LOST CREEK 037

3M N WARM SPRINGS, Deer Lodge, MT

Built 1931 Load: 27.2 t ADT: 899

S 1

Over: RR

6M S WARM SPRINGS, Deer Lodge, MT

Built 1964 Load: 27.2 t ADT: 4,553

S 1

Over: RR

6M S WARM SPRINGS, Deer Lodge, MT

Built 1964 Load: 27.2 t ADT: 2,277

CRACKERVILLE RD

Over: RR 001

4M S OPPORTUNITY, Deer Lodge, MT

Built 1946 Load: 29.0 t ADT: 515

STEWART ST

Over: SILVERBOW CREEK 012

E OPPORTUNITY, Deer Lodge, MT

Built 1969 Load: 29.1 t ADT: 109

I 90

Over: WILLOW CREEK

2.5M N OPPORTUNITY, Deer Lodge, MT

Built 1978 Load: 29.9 t ADT: 10,105

FRONTAGE ROAD 137

Over: WARM SPRINGS CREEK 039

WARM SPRINGS, Deer Lodge, MT

Built 1974 Load: 30.5 t ADT: 100

I 90

Over: WARM SPRINGS-EB INT RAMP

WARM SPRINGS, Deer Lodge, MT

Built 1978 Load: 31.8 t ADT: 94

S 273

Over: WARM SPRINGS CREEK

2M NE ANACONDA, Deer Lodge, MT

Built 1988 Load: 31.8 t ADT: 975

NORTH CABLE RD

Over: WARM SPRINGS CREEK 021

NW ANACONDA, Deer Lodge, MT

Built 1983 Load: 32.7 t ADT: 668

W RIVER RD

Over: CLARK FORK RIVER 014

6M N WARM SPRINGS, Deer Lodge, MT

Built 1981 Load: 32.7 t ADT: 100

I 90

Over: LOST CREEK

2.5M N WARM SPRINGS, Deer Lodge, MT

Built 1978 Load: 34.5 t ADT: 5,740

ROAD 169

Over: RACETRACK CR

1 MILE BEFORE CAMPGROUND, Deer Lodge, MT

Built 1981 Load: 35.0 t ADT: 50

NO DATA ENTERED

Over: E FK LAMARCHE CR

E FK LAMARCHE CR, Deer Lodge, MT

Built 1980 Load: 36.6 t ADT: 5

GALEN RD E

Over: CLARK FORK RIVER 038

GALEN, Deer Lodge, MT

Built 1973 Load: 39.0 t ADT: 100

NO DATA ENTERED

Over: JERRY CR

JERRY CR, Deer Lodge, MT

Built 1973 Load: 40.2 t ADT: 50

CEDAR STREET

Over: WARM SPRINGS CREEK 007

ANACONDA-CEDAR ST, Deer Lodge, MT

Built 1997 Load: 40.8 t ADT: 100

ROAD

Over: FOSTER CR

MAIN ENTERANCE TO AJC, Deer Lodge, MT

Built 1966 Load: 41.8 t ADT: 40

S 43

Over: DEEP CREEK

10M NW WISE RIVER, Deer Lodge, MT

Built 2006 Load: 46.3 t ADT: 454

S 43

Over: SEYMOUR CREEK

12M NW WISE RIVER, Deer Lodge, MT

Built 2006 Load: 53.5 t ADT: 454

NO DATA ENTERED

Over: STORM LAKE CREEK

NO DATA ENTERED, Deer Lodge, MT

Built 2011 Load: 70.0 t ADT: 10

NO DATA ENTERED

Over: WARM SPRINGS CR

ROAD TO REC RESIDENCE, Deer Lodge, MT

Built 2016 ADT: 50

FRONTAGE ROAD 146

Over: DRAINAGE 032

3M S WARM SPRINGS, Deer Lodge, MT

Built 1931 Load: 23.6 t ADT: 100

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026