Subterranean is a mod that adds a new spin on underground belts, subterranean belts. These belts are unique in that their specialized engineering allows them to travel a whopping 250 tiles underground. However, unlike standard issue underground belts that simply factor the length into the recipe, these belts cost the player belts based on distance, while the underground belt itself is cheap. This means no loss in efficiency by building short subterranean belts. The mod also adds pipes of a similar nature. Compatible with bobsmods. Original mod by Gangsir.

Kown issue:
If belts or pipes are built between already placed ones and connected to, then almost all amount of belts are lost, because logic returns belts between already connected ones and doesn't take into account (yet) that original belts were cut.