This committee concluded in 1903 that after the preventive measure of 1897, the mining pollution had been decreased, and they submitted a report suggesting that they should build a large, control basin near Watarase-gawa River's mouth for settling mineral poison and for preventing floods.
同委員会は1903年に、1897年の予防令後は鉱毒は減少したと結論づけ、洪水を防ぐために渡良瀬川下流に鉱毒沈殿用の大規模な「遊水池」を作るべきとする報告書を提出した。