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List of bridges on the National Register of Historic Places in Idaho facts for kids

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Idaho is home to many amazing old bridges and tunnels. These structures are more than just ways to cross rivers or mountains. They are important parts of history!

This article lists bridges and tunnels in Idaho that are on the National Register of Historic Places. This special list helps protect places that are important to American history. When a bridge or tunnel is on this list, it means it's a valuable piece of our past. It shows how people built things long ago and how transportation has changed.

Idaho's Historic Bridges and Tunnels

Idaho has many historic bridges and one important tunnel. These structures were built for different reasons. Some helped trains cross rivers, while others made it easier for cars to travel. Each one tells a story about Idaho's development.

Pegram Truss Railroad Bridges

Many historic bridges in Idaho are a special type called a Pegram truss. These bridges were designed by an engineer named George H. Pegram. They were very strong and often used for railroads. Several Pegram truss bridges in Idaho were built around the same time, in the late 1800s and early 1900s. They are great examples of early railroad engineering.

  • Cold Springs Pegram Truss Railroad Bridge: This bridge was built in 1894 and updated in 1917. You can find it near Ketchum. It's a classic example of a Pegram through truss bridge.
Cold-Springs-Bridge
The Cold Springs Pegram Truss Railroad Bridge near Ketchum.
  • Conant Creek Pegram Truss Railroad Bridge: Built in 1894, this bridge was also updated in 1911 and 1916. It's located near Grainville. This bridge helped trains cross Conant Creek.
ConantCreekBridge
The Conant Creek Pegram Truss Railroad Bridge.
  • Gimlet Pegram Truss Railroad Bridge: Another Pegram truss bridge from 1894, updated in 1914. It is also near Ketchum. These bridges show how important railroads were for Idaho's growth.
Gimlet-Bridge
The Gimlet Pegram Truss Railroad Bridge.
  • Grace Pegram Truss Railroad Bridge: This bridge was built in 1894 and updated in 1913. It's located in Grace. It's another example of the strong Pegram design.
  • Ririe B Pegram Truss Railroad Bridge: Built in 1894 and updated in 1914, this bridge is in Ririe. It's one of two Pegram bridges in the Ririe area.
RirieBridgeA
The Ririe B Pegram Truss Railroad Bridge.
  • St. Anthony Pegram Truss Railroad Bridge: This bridge was built a bit later, in 1896, and updated in 1914. It's found in St. Anthony. It's another important railroad bridge.
StAnthonyBridge
The St. Anthony Pegram Truss Railroad Bridge.

Other Unique Bridges

Idaho has many other types of historic bridges, each with its own special design.

  • Boise River and Canal Bridge: This bridge was built in 1922 in Caldwell. It's a type called a Warren camelback through truss. This design uses a series of triangles to make the bridge very strong.
Boise River and Canal Bridge (Caldwell, Idaho) (4)
The Boise River and Canal Bridge in Caldwell.
  • Capitol Boulevard Memorial Bridge: Built in 1931, this bridge is in Boise. It's a well-known landmark in the city.
Capitol Boulevard Memorial Bridge - Boise, Idaho (1)
The Capitol Boulevard Memorial Bridge in Boise.
  • Ninth Street Bridge: Also in Boise, this bridge was built in 1911. It's a Pratt through truss design. Pratt trusses are another common type of bridge that uses a specific pattern of beams.
Ninth street bridge boise 2009
The Ninth Street Bridge in Boise.
  • North Fork Payette River Bridge: This bridge, built in 1933, is near Smiths Ferry. It's a reinforced concrete arch bridge. Arch bridges are known for their strength and beautiful curved shape.
North Fork Payette River Bridge (Rainbow Bridge)
The North Fork Payette River Bridge, also known as Rainbow Bridge.
  • Owsley Bridge: Built in 1921, the Owsley Bridge is in Hagerman. It's a cantilevered Warren truss. Cantilever bridges are built out from supports, often meeting in the middle.
Owsley Bridge - Hagerman Idaho
The Owsley Bridge near Hagerman.
  • Washington Water Power Bridges: These bridges were built in 1929 and 1930 in Post Falls. They combine concrete arch and girder designs. Girders are strong beams used to support the bridge deck.
Washington Water Power Bridge
One of the Washington Water Power Bridges.

The Bullion Tunnel

Not all historic structures are bridges! Idaho also has an important historic tunnel.

  • Bullion Tunnel: This tunnel was built in 1910 near Avery. Tunnels like this were very important for trains to get through mountains. They helped connect different parts of the state.

Images for kids

  • Boise River and Canal Bridge (Caldwell, Idaho) (4)

    The Boise River and Canal Bridge in Caldwell.

  • Capitol Boulevard Memorial Bridge - Boise, Idaho (1)

    The Capitol Boulevard Memorial Bridge in Boise.

  • Cold-Springs-Bridge

    The Cold Springs Pegram Truss Railroad Bridge near Ketchum.

  • ConantCreekBridge

    The Conant Creek Pegram Truss Railroad Bridge.

  • Gimlet-Bridge

    The Gimlet Pegram Truss Railroad Bridge.

  • Ninth street bridge boise 2009

    The Ninth Street Bridge in Boise.

  • North Fork Payette River Bridge (Rainbow Bridge)

    The North Fork Payette River Bridge, also known as Rainbow Bridge.

  • Owsley Bridge - Hagerman Idaho

    The Owsley Bridge near Hagerman.

  • RirieBridgeA

    The Ririe B Pegram Truss Railroad Bridge.

  • StAnthonyBridge

    The St. Anthony Pegram Truss Railroad Bridge.

  • Washington Water Power Bridge

    One of the Washington Water Power Bridges.

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List of bridges on the National Register of Historic Places in Idaho Facts for Kids. Kiddle Encyclopedia.