By Theresa Davis / Journal Staff Writer   Diesel pumps and pipelines near Siphon Beach have delivered Rio Grande water to Corrales irrigators this spring and summer after a siphon broke. The Middle Rio Grande Conservancy District is considering several options to repair or replace the siphon. (Chancey Bush/Albuquerque Journal) The Middle Rio Grande Conservancy District is exploring how to repair or replace a broken siphon that has strained the Corrales irrigation water supply. Low river levels and high-maintenance equipment have hampered this summer's temporary solution to the aging infrastructure. Earlier this year after finding a hole in the siphon,...