Colo. Rev. Stat. § 31-12-411
The county treasurer shall proceed to collect all taxes assessed against persons or property within the limits of the cities or towns consolidating prior to such consolidation in the same manner as if no such consolidation had taken place. All moneys in the hands of the county treasurer at the date of consolidation belonging to any of the consolidating cities or towns and all moneys thereafter collected by him on account of any of such consolidating cities or towns shall be turned over by him to the proper officers of the consolidated city or town. In the same manner, if there are, at the date of consolidation, any moneys in the hands of any officer of any of the consolidating cities or towns belonging to his city or town, he shall forthwith turn over such moneys, upon the accomplishment of consolidation, to the proper officers of the consolidated city or town. The moneys thus obtained shall be applied to the payment of the indebtedness of the city or town from which they were derived, and the balance, if any, shall be used for the purpose of the consolidated city or town, unless the terms of consolidation otherwise provide.
C.R.S. § 31-12-411
This section is similar to former § 31-8-312 as it existed prior to 1975.