Status: No longer exists
Location: 45.100000,-112.708333
Carries CR 004 over Beaverhead River
Design: truss/through
Design Details: Through truss
Total Length: 98.1 Feet
Span Length: 96.1 Feet
Overview: Lost through truss bridge over Beaverhead River on CR 004
History: Built 1908; rehabilitated 1995; replaced 1995
Built: 1908
Location: Beaverhead County
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Status: No longer exists
Location: 45.235000,-112.626667
Carries CR 279 over Beaverhead River
Design: truss/pony
Design Details: Pony truss
Total Length: 142.7 Feet
Span Length: 71.5 Feet
Overview: Two-span pony truss bridge over Beaverhead River on CR 279
History: Built 1920; rehabilitated 2001
Built: 1920
Location: Beaverhead County
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Status: Open to traffic
Location: 45.305121,-112.563456
Carries CR 316 over Beaverhead River
Design: truss/pony/warren/verticals
Design Details: Warren pony truss with all verticals
Total Length: 100.1 Feet
Span Length: 100.1 Feet
Overview: Pony truss bridge over Beaverhead River on CR 316
History: Built 1930
Built: 1930
Location: Beaverhead County
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405807
Beaverhead River Bridge Over CR 316
View from the west
Photo taken by David Jones in October 2017
405808
Beaverhead River Bridge Over CR 316
Outriggers
Photo taken by David Jones in October 2017
405809
Beaverhead River Bridge Over CR 316
Northwestern abutment
Photo taken by David Jones in October 2017
405810
Beaverhead River Bridge Over CR 316
Metal stringers
Photo taken by David Jones in October 2017
405811
Beaverhead River Bridge Over CR 316
Northwestern portal
Photo taken by David Jones in October 2017
405812
Beaverhead River Bridge Over CR 316
View from the south
Photo taken by David Jones in October 2017
Status: Replaced by a new bridge
Location: 45.526538,-113.484266
Carries CR 012 over Big Hole River
Design: truss/pony
Design Details: Pony truss
Total Length: 82.0 Feet
Span Length: 82.0 Feet
Overview: Lost pony truss bridge over Big Hole River on CR 012
History: Built ca. 1920; replaced 1999
Built: ca. 1920
Location: Beaverhead County
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Status: Open to traffic
Location: 45.440324,-113.456869
Carries CR 085 over Big Hole River
Design: truss/pony/warren/verticals
Design Details: Warren pony truss with all verticals
Total Length: 100.1 Feet
Span Length: 100.1 Feet
Overview: Pony truss bridge over Big Hole River on CR 085
History: Built 1925
Built: 1925
Location: Beaverhead County
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353689
Photo taken by John A. Jackson
353690
Photo taken by John A. Jackson
Status: No longer exists
Location: 45.468183,-112.667468
Carries CR 210 over Big Hole River
Design: truss/through
Design Details: Through truss
Total Length: 128.9 Feet
Span Length: 128.0 Feet
Overview: Lost through truss bridge over Big Hole River on CR 210
History: Built 1892; replaced 2000
Built: 1892
Location: Beaverhead County
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Status: Open to traffic
Location: 45.526607,-112.701957
Carries I-15 Frontage Road over Big Hole River
Design: truss/through/pratt
Design Details: Pratt through truss
Total Length: 232.0 Feet
Span Length: 148.0 Feet
Overview: Through truss bridge over Big Hole River on I-15 Frontage Road
History: Built 1940
Built: 1940
Location: Beaverhead County
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406260
Big Hole River Bridge - Kalsta Bridge
View from the east
Photo taken by David Jones in October 2017
406261
Big Hole River Bridge - Kalsta Bridge
Guard rail
Photo taken by David Jones in October 2017
406262
Big Hole River Bridge - Kalsta Bridge
Northeastern pier from underneath the bridge
Photo taken by David Jones in October 2017
406263
Big Hole River Bridge - Kalsta Bridge
Corner structure
Photo taken by David Jones in October 2017
406264
Big Hole River Bridge - Kalsta Bridge
Latticework
Photo taken by David Jones in October 2017
406265
Big Hole River Bridge - Kalsta Bridge
Northeastern portal
Photo taken by David Jones in October 2017
406266
Big Hole River Bridge - Kalsta Bridge
Southwestern abutment
Photo taken by David Jones in October 2017
406267
Big Hole River Bridge - Kalsta Bridge
View from the north
Photo taken by David Jones in October 2017
Status: Open to traffic
Location: 44.801553,-112.749702
Carries CR 257 (Ashbough Trail) over Red Rock River
Design: truss/pony/pratt
Design Details: Pin-connected, 4-panel Pratt pony truss
Total Length: 64.0 Feet
Span Length: 64.0 Feet
Overview: Pony truss bridge over Red Rock River on CR 257 (Ashbough Trail)
History: Built 1909
Built: 1909
Location: Beaverhead County
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406268
Red Rock River Bridge
View from the southeast
Photo taken by David Jones in October 2017
406269
Red Rock River Bridge
Pin Connection
Photo taken by David Jones in October 2017
406270
Red Rock River Bridge
Pin Connection & decking
Photo taken by David Jones in October 2017
406271
Red Rock River Bridge
Turnbuckle
Photo taken by David Jones in October 2017
406272
Red Rock River Bridge
Southwestern portal
Photo taken by David Jones in October 2017
406273
Red Rock River Bridge
View From the east
Photo taken by David Jones in October 2017
Status: Open to traffic
Location: 45.014132,-113.226168
Carries CR 111 over Horse Prairie Creek
Design: truss/pony/warren/alt-verticals
Design Details: Warren pony truss with alternating verticals
Total Length: 54.1 Feet
Span Length: 54.1 Feet
Overview: Pony truss bridge over Horse Prairie Creek on CR 111
History: Built 1920
Built: 1920
Location: Beaverhead County
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353550
Photo taken by John A. Jackson
353551
Photo taken by John A. Jackson
Status: Closed to all traffic
Location: 44.914976,-112.826968
Carries CR 239 over Red Rock River
Design: truss/pony
Design Details: Pony truss
Total Length: 75.1 Feet
Span Length: 75.1 Feet
Overview: Pony truss bridge over Red Rock River on CR 239
History: Built 1913
Built: 1913
Location: Beaverhead County
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Status: Open to traffic
Location: 44.675293,-112.623744
Carries CR 266 over Red Rock River
Design: truss/pony
Design Details: Pony truss
Total Length: 56.1 Feet
Span Length: 56.1 Feet
Overview: Pony truss bridge over Red Rock River on CR 266
History: Built 1915
Built: 1915
Location: Beaverhead County
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407491
Red Rock River Bridge - Steelbridge Lane
View from the south west
Photo taken by David Jones in October 2017
407492
Red Rock River Bridge - Steelbridge Lane
Guard rail
Photo taken by David Jones in October 2017
407493
Red Rock River Bridge - Steelbridge Lane
Pin Connection
Photo taken by David Jones in October 2017
407494
Red Rock River Bridge - Steelbridge Lane
Southern abutment
Photo taken by David Jones in October 2017
407495
Red Rock River Bridge - Steelbridge Lane
Wooden stringers
Photo taken by David Jones in October 2017
407496
Red Rock River Bridge - Steelbridge Lane
Southern Portal
Photo taken by David Jones in October 2017
Status: Open to traffic
Location: 44.657506,-111.982161
Carries CR 269 over Red Rock River
Design: truss/pony/polygonal/alt-verticals
Design Details: Polygonal Warren pony truss with alternating verticals
Total Length: 98.1 Feet
Span Length: 96.1 Feet
Overview: Pony truss bridge over Red Rock River on CR 269
History: Built 1920
Built: 1920
Location: Beaverhead County
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353401
Photo taken by John A. Jackson
353402
Photo taken by John A. Jackson
Status: Open to traffic
Location: 45.225216,-112.650020
Carries CR 028 over West Bench Canal
Design: truss/pony
Design Details: Pony truss
Total Length: 65.0 Feet
Span Length: 64.0 Feet
Overview: Pony truss bridge over West Bench Canal on CR 028
History: Built 1909
Built: 1909
Location: Beaverhead County
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Status: Open to traffic
Location: 45.115962,-112.750797
Carries CR 559 over Beaverhead River
Design: truss/through/pratt
Design Details: Pratt through truss
Total Length: 96.1 Feet
Span Length: 96.1 Feet
Overview: Pratt through truss bridge over Beaverhead River on CR 559
History: Built 1908
Built: 1908
Location: Beaverhead County
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353691
Photo taken by John A. Jackson
353692
Photo taken by John A. Jackson
Status: Open to traffic
Location: 45.547331,-112.693387
Carries CR 320 over Big Hole River
Design: truss/through/polygonal/alt-verticals
Design Details: Polygonal Warren through truss with alternating verticals
Total Length: 174.9 Feet
Span Length: 174.9 Feet
Overview: Through truss bridge over Big Hole River on CR 320
History: Built 1915
Built: 1915
Location: Beaverhead County
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253161
Photo taken by montanatom1950
366210
Image
Published prior to 1923
406257
Browne's Bridge
View from the southeast
Photo taken by David Jones in October 2017
406258
Browne's Bridge
View from the east
Photo taken by David Jones in October 2017
406259
Browne's Bridge
Northeastern portal
Photo taken by David Jones in October 2017
Status: Open to traffic
Location: 45.527305,-112.702514
Carries Union Pacific Railroad over Big Hole River
Design: truss/through/lattice/triple
Design Details: Triple-intersection lattice through truss
Total Length: 240.0 Feet
Span Length: 140.0 Feet
Overview: Triple-intersection Warren through truss bridge over Big Hole River on Union Pacific Railroad
History: Built 1901
Built: 1901
Location: Beaverhead County
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405885
Union Pacific Big Hole River Bridge
View from the south
Photo taken by David Jones in October 2017
405886
Union Pacific Big Hole River Bridge
Northeast portal
Photo taken by David Jones in October 2017
405887
Union Pacific Big Hole River Bridge
Support foot
Photo taken by David Jones in October 2017
405888
Union Pacific Big Hole River Bridge
Southwestern pier & abutment
Photo taken by David Jones in October 2017
405889
Union Pacific Big Hole River Bridge
Southwestern approach
Photo taken by David Jones in October 2017
405890
Union Pacific Big Hole River Bridge
View from the southeast
Photo taken by David Jones in October 2017
Status: Open to traffic
Location: 45.115903,-112.751180
Carries Union Pacific Railroad over Beaverhead River
Design: truss/through/lattice/triple
Design Details: Triple-intersection lattice through truss
Total Length: 110.0 Feet
Span Length: 110.0 Feet
Overview: Triple-intersection Warren through truss bridge over Beaverhead River on Union Pacific Railroad
History: Built 1902
Built: 1902
Location: Beaverhead County
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405813
Union Pacific Beaverhead River Bridge
View from the north
Photo taken by David Jones in October 2017
405814
Union Pacific Beaverhead River Bridge
Southwestern abutment
Photo taken by David Jones in October 2017
405815
Union Pacific Beaverhead River Bridge
Northeastern portal
Photo taken by David Jones in October 2017
405816
Union Pacific Beaverhead River Bridge
View from the south
Photo taken by David Jones in October 2017
405817
Union Pacific Beaverhead River Bridge
Riveted beams
Photo taken by David Jones in October 2017
405818
Union Pacific Beaverhead River Bridge
View from the west
Photo taken by David Jones in October 2017
405819
Union Pacific Beaverhead River Bridge
Builders plaque
Photo taken by David Jones in October 2017
Status: Replaced by a new bridge
Location: 45.547182,-112.693389
Carries Brownes Bridge Road over Big Hole River
Design: truss
Design Details: Truss
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Truss bridge over Big Hole River on Brownes Bridge Road
History: Built 1863; replaced 1915
Built: 1863
Location: Beaverhead County
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366211
Image
Published prior to 1923
Status: Open to traffic
Location: 45.701584,-112.735788
Carries Maiden Rock Road over Big Hole River
Design: truss/through/parker
Design Details: Parker through truss
Total Length: 202.1 Feet
Span Length: 198.2 Feet
Overview: Parker through truss bridge over Big Hole River on Maiden Rock Road
History: Built or relocated here 1951; rehabilitated 1993
Built: 1951
Location: Beaverhead County
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435368
Maiden Rock Bridge
View from the northeast
Photo taken by David Jones in September 2018
435369
Maiden Rock Bridge
Eastern Portal
Photo taken by David Jones in September 2018
435370
Maiden Rock Bridge
Guard Rail
Photo taken by David Jones in September 2018
435371
Maiden Rock Bridge
Riveting
Photo taken by David Jones in September 2018
435372
Maiden Rock Bridge
Eastern abutment
Photo taken by David Jones in September 2018
435373
Maiden Rock Bridge
View from the southeast
Photo taken by David Jones in September 2018
435374
Maiden Rock Bridge
View from the northeast
Photo taken by David Jones in September 2018
Status: Open to traffic
Location: 45.182619,-112.680308
Carries Mt Hwy 91 over Rr
Design: beam/tee
Design Details: Concrete tee beam
Total Length: 143.1 Feet
Span Length: 49.9 Feet
Overview: Concrete tee beam bridge over Rr on Mt Hwy 91
History: Built 1936
Built: 1936
Location: Beaverhead County
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455325
MT Highway 91 - Railroad Bridge
View from the northeast
Photo taken by David Jones in August 2019
455326
MT Highway 91 - Railroad Bridge
View from the southeast
Photo taken by David Jones in August 2019
455327
MT Highway 91 - Railroad Bridge
Cement Railing
Photo taken by David Jones in August 2019
455328
MT Highway 91 - Railroad Bridge
Western Pier & Abutment
Photo taken by David Jones in August 2019
455329
MT Highway 91 - Railroad Bridge
Western Pier
Photo taken by David Jones in August 2019
455330
MT Highway 91 - Railroad Bridge
Eastern Abutment
Photo taken by David Jones in August 2019
455331
MT Highway 91 - Railroad Bridge
Eastern Portal
Photo taken by David Jones in August 2019
455332
MT Highway 91 - Railroad Bridge
Union Pacific Railroad
Photo taken by David Jones in August 2019
455333
MT Highway 91 - Railroad Bridge
Photo taken by David Jones in August 2019
Status: Open to traffic
Location: 45.182272,-112.678125
Carries Mt Hwy 91 over Poindexter Slough
Design: beam/tee
Design Details: Concrete tee beam
Total Length: 77.1 Feet
Span Length: 24.9 Feet
Overview: Concrete tee beam bridge over Poindexter Slough on Mt Hwy 91
History: Built 1936
Built: 1936
Location: Beaverhead County
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455316
MT Highway 91 - Poindexter Slough Bridge
View from the southeast
Photo taken by David Jones in August 2019
455317
MT Highway 91 - Poindexter Slough Bridge
Western pier
Photo taken by David Jones in August 2019
455318
MT Highway 91 - Poindexter Slough Bridge
Western Abutment
Photo taken by David Jones in August 2019
455319
MT Highway 91 - Poindexter Slough Bridge
Eastern abutment
Photo taken by David Jones in August 2019
455320
MT Highway 91 - Poindexter Slough Bridge
Eastern Pier
Photo taken by David Jones in August 2019
455321
MT Highway 91 - Poindexter Slough Bridge
View from the west
Photo taken by David Jones in August 2019
455322
MT Highway 91 - Poindexter Slough Bridge
Cement railing
Photo taken by David Jones in August 2019
455323
MT Highway 91 - Poindexter Slough Bridge
Eastern Portal
Photo taken by David Jones in August 2019
Status: Replaced by a new bridge
Location: 45.210466,-112.638898
Carries street over Dillon Canal
Design: beam/stringer/steel
Design Details: Steel stringer
Total Length: 0.0 Feet
Span Length: 0.0 Feet
Overview: Lost Steel stringer bridge over Dillon Canal on street
History:
Built:
Location: Beaverhead County
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502366
Dillon Canal Bridge
Photo from old postcard
Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S - Dismantled and/or in storage. L - Severe loss of historic integrity due to alteration.
