The "IronFlood" Is a an Iron Farm that produces 6,000 plus iron an hour and is easily expandable to produce even more iron.
When you load the world up the chest will be empty, so the farm will start as sson as you enter the world.

I used 4 Layes which is made up of
144 Villagers
48 Zombies (With Nametags to not despawn)

In The Screenshots I'm Using Chocapic13 V7.1 Shader Pack and Optifine