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<br /> <br />CHAPTER 2 <br />CWCB PRINCIPLES <br /> <br />SECTION 2 <br />CWCB OPERATING <br />PRINCIPLES <br /> <br />COLORADO <br />FLOODPLAIN AND STORMWATER CRITERIA MANUAL <br /> <br />discharges from industries and municipal wastewater treatment plants. However, in <br />the last several years, the EPA has expanded the NPDES program to cover <br />stormwater discharges. <br /> <br />OPERATING PRINCIPLE <br /> <br />THE CWCB ENCOURAGES DESIGN OF DRAINAGE FACILITIES AND OTHER <br />MEASURES THAT ENHANCE THE QUALITY OF STORM RUNOFF. PLANNING <br />AND DESIGN OF DRAINAGE FACILITIES SHOULD BE PREPARED TO <br />MINIMIZE ADVERSE IMPACTS AND/OR IMPROVE WATER QUALITY OF THE <br />RESULTING STORM RUNOFF DISCHARGES. DRAINAGE FACILITIES MAY BE <br />DESIGNED TO FUNCTION AS BOTH STORM RUNOFF CONVEYANCE AND <br />WATER QUALITY ENHANCEMENT FACILITIES. THIS RECOMMENDATION IN <br />NO WAY SUPERSEDES REQUIREMENTS RELATED TO THE EPA's NATIONAL <br />POLLUTENT DISCHARGE ELIMINATION SYSTEM (NPDES) OR OTHER WATER <br />QUALITY STANDARDS. <br /> <br />APRIL 2004 <br /> <br />CWCS OPERATING <br />PRINCIPLES <br /> <br />CH2-211 <br />