Irrigation Canals or Laterals on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice 320
This data set represents the estimated percentage of the 1-km grid cell that is covered by or subject to the 
agricultural conservation practice (CP320), Irrigation Canals or Laterals on agricultural land by county.  An 
Irrigation Canals or Laterals (ICL) is a "permanent channel constructed to convey irrigation water …