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. The lOO-year runoff shall be computed at the point where the major drainage path enters the proposed development and again where the major drainage path leaves the development. Intermediate points of runoff shall be computed where deemed critical and to better define the major drainage path. Critical points are generally identified by the intersection of a drainage path with the major drainage path, rapid changes in grades or channel widths. The runoff shall be based on the total area tributary to the runoff point regardless of the ratio of developed area to the drainage basin. The width of the channel and maintenance access to the channel shall be as defined in Section 5.0-0pen Channels. No development will be allowed within this designated area. Said area shall be called a drainage right-of-way and identified as such on all plans and plats. The drainage right-of-way shall be dedicated to the City for public use. Access roads shall be dedicated to the City where necessary. Where possible and as required by the City, the major drainage channels shall be incorporated into greenbelt and recreational areas. Natural drainage channels lend themselves to greenbelt areas. Where the width can be extended, hiking trails, pedestrian walkways and bicycle paths should be located in the major drainage path. Due consideration should be given to street and utility layout to gain maximum aesthetic use of the drainage path. . The initial and major storm frequencies to be used for runoff analysis and the subsequent design of stormwater control facilities in the city of Greeley are presented' below: . '. .... . ..... .................... D"8"GN '8'1'0"" FR.."....NO....S. .. . ::',:,::.;::.,",::::;:::,: ":::::::. ::"::):\H8\(:f/~/\: ,_)~::...:,:+:".":,,.,.,../~\:.:.:<<::.":.:.I(W'I' ~~.~,~_:_._:_::,_..::+,~ ..:.)}:::::: ::,-;,., J:n~lllll!ii ....r~~lllli Residential 2':"year lOa-year commercial, Business & Industrial s-year loa-year Do~ntown Business Area, Airport Terminals and Industrial (1) la-year loa-year (1) Any industrial' development within or adjacent to airport terminals or the downtown business area shall have an initial storm frequency of la-years. . 3-2 ;..::.QI3 . ,'tX!,;' ~ d", .7':;1' I Ii I I I I I I I I I I I (J [I [J [J [J