Ramba uchinyora ndima iyi - Muna 1958, United States Army Corps of Engineers yakapedza kuvaka dhamu reCoralville rakatenderedza Rwizi rweIowa, makiromita matanhatu kuchamhembe kweguta racho, ichigadzira Lake reCoralville. Kunze kweMafashamo Makuru a1993
uye mafashamo makuru eIowa a2008, dhamu racho rakabatsira kudzivisa mafashamo makuru muguta racho. Kubva muna June kusvika muna August 1993, migwagwa mikuru mitatu yokufambisa yeCoralville neIowa City yakanyura. Kukanganiswa kwezvoupfumi mugore iroro kwakanga kwakakomba, asi guta racho rakanga rava kunyatsozvigadzirisa mukati memakore maviri. Mafashamo a2008 akabvumikisa kuva anodhura zvikuru sezvo Rwizi rweIowa rwakapfuura mwero wenguva dzose wa1993 pakapfuura.