WATER BAR - A diagonal ditch or hump in a trail that diverts surface water runoff to minimize soil erosion.

WATER CONTROL - Management of water (both surface and subsurface) to maintain plant growth, water quality, wildlife habitat, and fire control.

WILDLIFE - A broad term that includes nondomesticated vertebrates, especially mammals, birds, and fish.

WINDROW - A long, narrow row of vegetation, debris, and some soil created during site preparation and clearing operations.

WINDTHROW - Trees uprooted by excessive wind. Shallow-rooted trees are almost always affected.