N.M. Code R. § 19.27.1.18
In the case of any ground water right initiated after September 6, 1912, the water may not be transported in earthen ditches more than one and one half (1 1/2) miles or in open ditches or flumes lined with concrete or other impervious material more than two (2) miles from the well which is the source of supply.
[SE-66-1 Article 1-11, Recompiled 12/31/01]