Waterway B (水路B) is a section of an underground cave system, with an exit leading to the wall behind the waterfall. A boat can be taken from here to Waterway A.
Waterway B is an underground cave passage which connect the Waterfall into the Quarry. The place is swarming with bats.
Upon entering, there is a torchlight on the right which contains one spinel.
- Koichi Hamamura, ed (2006) (in Japanese). biohazard4 kaitaishinsho revised edition. Famitsu. ISBN 4-7577-2638-4.