The most important thing in Coachella Valley's history is water, and the most important source is the 123-mile Coachella branch from drop 1 of the All American Canal diversion of the Colorado River. 

Location:  Coachella branch of the All American Canal terminus at Lake Cahuilla.   GPS coordinates (photo):  33º37.550 N - 116º16.105W

Full text and lyrics available on ‘Folk Songs Of The Coachella Valley’