 The dam became obsolete with completion of a cement-lined canal carrying water from the upstream American Diversion Dam to the head of the canal.It was partially removed in 2003.The 21 May 1906 treaty between the United States and Mexico for "an equitable distribution of the waters of the Rio Grande" guaranteed Mexico up to annually, with the Americans taking the rest, except in time of drought when the shares would be reduced on a percentage basis.