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<br /> <br />. <br />PROPOSED <br />OPERATING PRINCIPLE #10 <br /> <br />. <br /> <br />STORMWATER RUNOFF DETENTION <br /> <br />THE CWCB RECOMMENDS THAT LOCAL GOVERNMENT ENTITIES <br />REQUIRE ADEQUA TE DETENTION FACILlTES BE APPROPRIA TEL Y <br />DESIGNED AND CONSTRUCTED BY DEVELOPMENT PROPONENTS TO <br />MITlGA TE THE INCREASE IN FLOWS CAUSED BY URBANIZA TlON AND <br />INCREASED IMPERVIOUS SURFACES. <br /> <br />THE FLOOD ATTENUATION BENEFITS OF PUBLlCALL Y OWNED, <br />OPERA TED, AND MAINTAINED DETENTION FACILITIES OR PUBLlCALL Y <br />CONTROLLED PRIVA TEL Y OWNED DETENTION FACILITIES SHOULD BE <br />FULL Y RECOGNIZED FOR THE PURPOSE OF DETERMINING FLOOD <br />I <br />HAZARD AREAS DOWNSTREAM OF THE DETENTION FACILITIES. THE <br />ATTENUATION BENEFITS OF PRIVATELY OWNED DETENTION FACILITIES <br />THAT ARE NOT CONTROLLED BY PUBLIC AGENCIES SHOULD NOT BE <br />CONSIDERED IN FLOODPLAIN ANALYSES. <br /> <br /> <br />, <br />