CompletedKoga Dam and Irrigation Development Project Region Amhara National Regional StateZone | Woreda West Gojam | Mecha woreda Equipped Areas 7200 HectaresType of Headwork Rock fill Dam with central impervious core Date Started November, 1997 Ethiopian CalendarDate Completed May, 2003 Ethiopian Calendar Project Cost 1.142 Billion Ethiopian BirrIrrigation System Furrow