C.R.S. § 30-11-207: Obstructions or pollutions.

The city council of the city and county of Denver may enact and adopt ordinances for the purpose of preventing and removing obstructions in said channel or encroachments upon the same or polluting the waters thereof; and to in every manner control, regulate, and protect said property when improved in whole or in part, and provide for a penalty for the violation of any of said ordinances.