Kammala wannan jumla: Tare da bayyanar da ƙananan ƙungiyoyi na rukuni a cikin
1993 ambaliyar ruwa, duka Majalisar Grove Group, daga hillcrest Speiser Shale saukar zuwa kandami-matakin Americus dutsen lemun tsami, an fallasa don nazari daga sama zuwa kasa a cikin Tuttle Creek Lake Spillway.