In the Epic of Gilgamesh, Utnapishtim builds a boat to survive a devastating flood.
Utnapishtim is warned by the god Ea, who instructs him to construct a large boat and preserve living creatures, craftsmen, and the seed of all living things. After the flood, he releases birds to determine whether the waters have receded. The story includes a raven and several doves, creating a notable parallel with the Genesis account of Noah.
Utnapishtim's flood narrative appears in the Standard Babylonian version of the Epic of Gilgamesh, especially on Tablet XI. The character is also closely related to Atrahasis, the flood survivor in an earlier Mesopotamian tradition; the two figures are sometimes confused because their stories share major motifs.
Utnapishtim is not the builder in the Genesis account—that role belongs to Noah. The question concerns the Mesopotamian epic, where the survivor's name is Utnapishtim.