ʻO Trenchless kahi hana hana i ka ʻenekinia i kēlā me kēia lā, e like me ke kūkulu ʻana i ka wili ʻana, ka hana ʻana i ka paipu, ka ʻaila hinu, ka ʻimi ʻāina a me ke kūkulu ʻana i ka mīkini pale tunnel.ʻO nā papahana i hana ʻole i ka hana ma lalo o ka ʻāina ma ka ʻeli ʻana i ka ʻāina i kapa ʻia ʻo trenchless projects.Ma nā papahana ʻauwaha ʻole, hana nui ka bentonite ʻaʻohe ʻauwaha.