Cascades Diversion Dam Removal

The video tutorial explains a restoration project involving a Rockwall. Large rocks are placed by a contractor, followed by willow cuttings inserted into the voids. These voids are then filled with soil and finer materials to support the growth of willows. This method not only strengthens the wall but also helps naturalize the channel, creating habitats and promoting plant establishment.

What is the initial task performed by the construction contractor in the restoration process?

• Creating habitats

• Placing large rocks

• Placing willow cuttings

• Washing fines into voids

What is placed into the voids between the large rocks to support plant growth?

• Sand

• Gravel

• Willow cuttings

• Concrete

What materials are washed into the voids to help the willows root?

• Fines, soils, and cobbles

• Sand and gravel

• Water and clay

• Concrete and cement

What is one of the main benefits of combining rocks with plant materials in the wall?

• It makes the wall waterproof

• It speeds up the construction process

• It creates a stronger wall

• It reduces construction costs

How does the combination of rocks and plants affect the surrounding environment?

• It increases soil erosion

• It makes the area more industrial

• It creates a natural habitat

• It prevents any plant growth