It is similar to other fissure sites across Appalachia, with a radiating green fissure surrounded by corpses of dead fauna, human beings, and scorchbeast guano piles. However, it is much larger than other fissure sites, and contains a vibrant green radioactive substance, incubating Scorched. Scorchbeasts may be found at this location. Three unmarked fissures around Fissure site Prime serve as Scorchbeast spawns to ensure that if the Scorchbeast queen is summoned, she will have bodyguards to protect her in the air and draw attention away from her, or keep players busy before her awakening when the nuke lands and detonates. When the nuke detonates on the fissure and awakens the queen, the fissure is temporarily sealed by collapsed rocks until Scorched Earth is over, where it will then reopen until nuked again.
- Scorched Earth: Launching a nuclear weapon at this fissure site will spawn a Scorchbeast queen and begin the quest.
Fissure site Prime appears only in Fallout 76.