Before the apocalypse, this dam held enough water that it made a lake. Isaac would come here with his grandfather to fish often.
Sometime in the apocalypse, something caused the dam to be completely drained. because of this, on maps it would show a lake here instead of an empty valley. Isaac and Rachel realized this after having left the Pioneers and decided to hide from them here.
Isaac and Morgan arrive at the valley his wife is staying at, observing a group of walkers from the hill above. Morgan decides to help Isaac, and proceeds through the crowd of walkers, eventually falling and becoming noticed by one. Before being bitten, Isaac uses the last bullet in the gun to kill the walker, and the two begin to take them all down. The two make it through the dam and into the dried up lake, finding Rachel nearing labor. At night, as Rachel is about to give birth, Emile arrives, and Morgan insists that Isaac stays out of the way to allow him to be killed so that they could begin a community in the valley. Before Morgan is able to be killed, Isaac stabs Emile, yet is overpowered. Morgan assists Isaac and briefly knocks out Emile, where Isaac reveals to Morgan he was bitten before meeting him. Emile soon gets back up and continues his fight, overpowering Isaac and almost killing Morgan until he is stabbed and decapitated.
Hearing that his child has been born, Isaac is urged by Morgan to meet them. When Morgan passes out, Isaac names his child Morgan with Rachel. Later in the night, he removes the bullet and dead tissue from Morgan's wound, patches him up, and eventually gives in to the infection, being put down by Rachel. When Morgan wakes, he learns that Isaac has died and helps to bury him.