Quests starting in Isengard Depths

NameLevelZoneArea
Book 4, Chapter 19: The Caverns of Isengard 72 Isengard Depths Isengard Depths 
Book 4, Chapter 20: In The Presence of Saruman 72 Isengard Depths Isengard Depths 
Book 4, Chapter 23: The Wizard's Vale 72 Isengard Depths Isengard Depths 
Book 4, Chapter 24: A Pinch of Black Powder 72 Isengard Depths Isengard Depths 
Book 4, Chapter 25: Final Preparations 72 Isengard Depths Isengard Depths 
Book 4, Chapter 26: Escape from Isengard 72 Isengard Depths Isengard Depths 
Heavy Lifting 72 Isengard Depths Isengard Depths 
Instance: Escape from Isengard 72 Isengard Depths Isengard Depths 
Kill Ten Rats 72 Isengard Depths Isengard Depths 
The Slop 72 Isengard Depths Forges (Isengard Depths) 

Quests involving Isengard Depths

NameLevelZoneArea
Book 4, Chapter 18: The Captive 72 Dunland Gravenwood 
Book 4, Chapter 22: Feed the Prisoners 72 Isengard Isengard 
Isengard: Pits of Isengard 75 Middle-earth Global 
Task: Blotchy Skins (Forthbrond) 71 Gap of Rohan Isendale