Consider the following statements regarding the Hirakud Dam:

1. Hirakud Dam is the longest earthen dam in the world, built across the river Mahanadi in the state of Odisha.

2. It forms the largest artificial lake in Asia, covering an area of 746 square kilometers.

3. The dam's construction includes a combination of earth, concrete, and masonry.

Which of the statements given above is/are correct?