Satunaigawa Dam web site（History of Satunaigawa Dam）
History of Satunaigawa Dam
| 1971 | Preliminary investigation started |
| April 1981 | Planning stage started |
| April 1985 | Construction started |
| March 1986 | Construction of necessary roads started |
| October 1987 | Construction of accessory roads started |
| November 1988 | Construction of the dam started |
| June 1989 | Excavation of the foundation started |
| October 1989 | Redirection of the river flow started |
| May 1991 | Concrete pouring started |
| September 1991 | Corner stone laid to commemorate construction of the dam |
| May 1996 | Pouring of concrete completed(770,000m3) |
| December 1996 | Second redirection of river flow started |
| April 1997 | Filling test started(ended in December) |
| June 1997 | Accessory roads opened |
| July 1998 | Completion ceremony held |
| April 1999 | Control office opened |
1.Before the dam construction
(September 1985)
(September 1985)
2.Foundation excavation
(May 1990)
(May 1990)
3.Pouring concrete
(October 1994)
(October 1994)
4.Filling test
(June 1997)
(June 1997)