Historic Bridges of the U.S. | Lewis and Clark County

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Dearborn River High Bridge
Deck truss bridge over Dearborn River on CR 300
Open to traffic
Built 1897 by the King Bridge Co.; rehabilitated 2003

Elk Creek Bridge
Through truss bridge over Elk Creek on CR 309 in Augusta
Open to traffic
Built 1914

Elk Creek Bridge
Pony truss bridge over Elk Creek on CR 316
Open to traffic
Built 1915

Elk Creek CR 416 Bridge
Lost pony truss bridge over Elk Creek on CR 416
No longer exists
Built 1915; replaced 2002

Flat Creek Bridge
Pony truss bridge over Flat Creek on CR 320
Open to traffic
Built 1901

Little Prickly Pear Creek Bridge
Through truss bridge over Little Prickly Pear Creek on CR 005
Open to traffic
Built 1905

Little Prickly Pear Creek Bridge
Lost pony truss bridge over Little Prickly Pear Creek on CR 233
No longer exists
Built 1897; replaced 2001

Missouri River Bridge
Through truss bridge over Missouri River on Frontage Road 003
Open to traffic
Built 1933

Missouri River Bridge
Lost truss bridge over Missouri River on CR 013
No longer exists
Built 1903; replaced 2006

North Fork Sun River Bridge
Pony truss bridge over North Fork Sun River on FDR 8983
Open to traffic
Built 1927

North Fork Sun River Bridge
Truss bridge over North Fork Sun River on a county road
Open to traffic
Built 1916

Ten Mile Creek Bridge
Pony truss bridge over Ten Mile Creek on a county road in Helena West Side
Open to traffic
Built 1894

Woodbridge Drive Bridge
Wooden arch bridge over Sep Gully on Woodbridge Drive in Helena
Open to traffic
Built 1975