Irrigation resources are those that are associated with the development of water conveyance for agricultural purposes. Our office has frequently addressed how to best document these resources (see policy papers). 

Only main canals and primary laterals that divert directly from canals (these typically have a name or number), and regulated drainage systems require recordation and evaluation. Resources below that level, such as tertiary laterals or ditches are not required to be recorded and are considered ineligible. There are always exceptions. Ditches associated with mining sites or homestead sites would be considered a feature of a larger site or district and would therefore require recordation as such. 

For information on how best to document irrigation resources, please refer to our guidance. 

Legacy Irrigation Resources Policy Memos