BasketMC and his chatroom work on the cart delivery lines that bring chest minecarts (engine, freight and caboose) to the main level from the areas below. These are part of the Basket Station, a large smart train station he's building on the Hypermine Vanilla SMP server.
BasketMC
Spawners Located - Inversion SMP - Season 1 Episode 6
In this episode I venture into the neighboring abandoned mineshafts and caves located around Basketopia in search of goodies. I need to collect 164 blocks if iron (or gold) to make the beacon's base so lots of caving is required.