It is the duty of the county assessor of Mesa county, Colorado, as soon as the assessment roll is ready in each year for the extension of the taxes, to extend the same upon the tax list of the current year in a separate column properly headed in the same manner as other taxes are extended, carrying said district tax into the general total of all taxes for the year, and he shall include the said district taxes in his general warrant to the county treasurer for collection.
C.R.S. § 37-31-140