Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Yosemite National Park' has mentioned 'Dam' in the following places:
Occurrence Sentence Text Source
In 1903, a dam in the northern portion of the park was proposed.
[52] In 1913, the U.S. Congress authorized the O'Shaughnessy Dam through passage of the Raker Act.
O'Shaughnessy Dam in Hetch Hetchy Valley