Ubwoko bwa U bushyushye buzungurutseIkirundo cy'amabati y'icyumas, nk'ibikoresho bishya by'ubwubatsi, ishobora gukoreshwa nk'uburyo bwo kubika ubutaka, kubika amazi no kubika umucanga mu bwubatsi bwa cofferdam bridge, gushyiraho imiyoboro minini no gucukura imiyoboro by'agateganyo. Igira uruhare runini mu buhanga nko kurinda inkuta, kubika inkuta no kurinda uruzitiro mu cyambu no mu gikari cyo gupakurura. Ikirundo cy'icyuma cya Larsen nka cofferdam ntabwo ari icyatsi kibisi gusa, kirinda ibidukikije, ahubwo kinanihuta mu bwubatsi, igiciro gito cy'ubwubatsi, kandi gifite akazi keza ko kudapfa amazi.