1. Diversion structures were obtained from the State of Colorado's HydroBase database. 2. Key diversions were identified from the structures based on their importance for consumptive use modelling. 3. Key diversions were mapped and the closest ditch in the 24K ditch layer to each diversion was identified.
1. Using the diversion structures and ditch layer service area boundaries were digitized. 2. A digital elevation model was used to identify land above and below each ditch. Boundaries were digitized around land that could be irrigated from a diversion by gravity.
1. Meetings were held with Water Commissioners and ditch companies to verify irrigated parcels, crop type, and water source. 2. Service area boundaries were verified during these meetings. 3. Errors in the boundaries were edited and corrected in the irrigation service areas.