An yi amfani da dredges iri biyu na Ellicott® a hade don taimakawa bude hanyar zirga-zirgar jiragen ruwa zuwa Grand Traverse Harbor a cikin Michigan, aikin da aka kammala shi a watan Yulin 2020. An rufe tashar jirgin da yashin hatimi, ragowar duwatsu masu duhu da duhu masu duhu daga aikin tarihi na tama. A cikin ƙarni na 19 da na 20, mashinan hatimi a Tsibirin Tsibirin Keweenaw sun samar da tan miliyan 25 na shara, wanda aka ajiye bisa doka ta kusa da Lake Superior. Yashewa da ruwa a cikin shekaru sun sa sandar hatimi ta bi ta kudu a hankali a gabar Gay, Michigan, ta haifar da bakin teku da toshewa a cikin ...Ci gaba Karatun