Nyora kupfuurira kweiyi ndima - Pashure pekudengenyeka kwepasi kweSan Fernando muna 1971
, California Department of Water Resources Division of Safety of Dams yakarayira kuongorora kugadzikana kwemadhamu ose ekuzadza mvura muCalifornia, kusanganisira madhamu eChatsworth Reservoir. Kuongorora kwacho kwakaratidza kuti madhamu eChatsworth aizofanira kuvakwazve zvakakwana kuti ave akachengeteka pakunenge kwaitika kudengenyeka kukuru. Muna 1972 dziva racho rakacheneswa ndokudzimwa. Hapana purogiramu yokuvakazve Dziva reChatsworth yakagadzwa.