A valley is created by water primarily through the process of erosion. As rivers or streams flow over land, they wear away soil and rock, gradually carving out a channel. Over time, this continuous erosion deepens and widens the channel, leading to the formation of a valley. Additionally, glacial activity can also create U-shaped valleys as glaciers carve through rock and sediment during their movement.
Colne Valley Water was created in 1873.
Dee Valley Water was created in 1863.
Santa Clara Valley Water District was created in 1952.
A valley typically is created by erosion, either by water or a glacier. I suppose a valley could also be created as two tectonic plates separate, such as the Great Rift Valley.
Rutland Water was created by building a dam across the Gwash Valley in the late 1970s. This dam created a large reservoir by flooding the valley, which is now Rutland Water. It was constructed primarily for water supply, flood control, and leisure activities.
In the Valley was created in 1890.
In a Valley by the Sea was created on 2007-10-04.
The Valley of the Lost was created in 2002.
Valley of the Shadows was created in 1993.
Wye Valley was created in 1971.
Valley Cougars was created in 2001.
Smoky Valley was created in 1954.