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<br />The lOa-year runoff shall be computed at the point where the major <br />drainage path enters thE! proposed development and a(]ain where the <br />major drainage path leavl=s the development. Intermediate points of <br />runoff shall be computed where deemed critical and to better define <br />the major drainage path. Critical points are ':Jenerally identified <br />by the intersection of a drainage path with the najor drainage <br />path, rapid changes in grades or channel widt.hs. Th,e runoff shall <br />be based on the total ar,=,a tributary to the runoff point regardless <br />of the ratio of developed area to the drainage basin. <br /> <br />The width of the chann,=,l and maintenance access to the channel <br />shall be as defined in Section 5.0-0pen Channels. No development <br />will be allowed within this designated area. :3aid area shall be <br />called a drainage right-cof-way and identified as such on all plans <br />and plats. The drainage right-of-way shall be dedicated to the <br />city for public use. Access roads shall be dedicated to the city <br />where necessary. <br /> <br />Where possible and as ['equired by the City, t~he major drainage <br />channels shall be incorporated into greenbelt and recreational <br />areas. Natural drainaqe chann<:ls lend themse,lves to gre<:nbelt <br />areas. Where the width can be extended, hiking trails, pedestrian <br />walkways and bicycle paths should be located in the major drainage <br />path. Due consideration should be given to street and utility <br />layout to gain maximum aesthetic use of the drainage path. <br /> <br />The initial and major storm frequencies to be used for runoff <br />analysis and the subsequent design of stormwater cont:rol facilities <br />in the City of Greeley are presented below: <br /> <br /> - <br /> DESIGN STORK FREQUENCIES <br /> LaneS Use Initial S <br /> Frequen <br /> Residential 2-year <br /> - <br />commercial, Business & 5-year <br /> Industrial <br />Downtown Business Area~ Airport la-yea <br />Terminals and Industrial (1 ) <br /> <br />:I Major Storm <br />Frequency <br /> lOa-year <br /> loa-year <br /> lao-year <br /> <br />to <br />cy <br /> <br />r <br /> <br />(1) Any industrial development within or adjace,nt to airport <br />terminals or the dmmtown business area shall have an initial <br />storm frequency of la-years. <br /> <br />3 - 2 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />