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<br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />AN EV^"UAT10N 01; TilE IlESll;NATlON OF Till' TOWN 01; Wi:l.LIN(;TON <br />AS llEING IN TilE BOXEl.llIm CREEK 1 Illl YfiAR FREQUENCY HOOIl !'I.A IN <br /> <br />The document entitled "Flood Plain Information, Boxelder Creek Watershed, <br /> <br /> <br />Larimer County, Colorado" was examined in its entirety together with the associ- <br /> <br /> <br />ated documents "Watershed Work Plan", and "Watershed Work Plan, Conunittee on <br /> <br /> <br />Public Works, United States Senate, Serial Number 93-3". Also related documents <br /> <br /> <br />from the files of the Colorado State Soil Conservation Service in Denver, <br /> <br /> <br />Colorado were examined to complete the technical background for this report. In <br /> <br /> <br />addition, several County Conunissioners' hearings and other related conferences <br /> <br /> <br />and field investigations were held in an attempt to reconsider the designation of <br /> <br /> <br />the Town of Wellington as being in a 100 year frequency flood plain. <br /> <br />In our conferences and consultations with the entities responsible for designating <br /> <br /> <br />Wellington in a 100 year flood plain, two basic points of contention have slIrf:Jced: <br /> <br /> <br />(lj Are the analyses and computations prepared by the Soi I Conserv:Jtion Service <br /> <br /> <br />an accurate indication of a 100 year frequency flood problem? and (2) Can the <br /> <br /> <br />Boxelder Channel and certain diversion structures handle a 100 year frequency <br /> <br /> <br />flood? <br /> <br />Exhibit A is a map showing the Wellington area and the area north of Wellington. <br />Four things can be readily determined from this map: <br />(1) Boxelder Creek lies on the west side of the Railroad tracks in the <br />west portion of Wellington. <br />(2) Coal Creek dead ends two miles north of Wellington. <br />- <br />(3) Two large ditches run east-west north of Wellington - one ditch inter- <br />cepts Coal Creek 2 1/2 miles north of Wellington. <br />(4) A hilly rise beginning I mile north of Wellington separates the Coal <br />Creek basin from the Boxelder Creek basin. <br /> <br />In the document "Watershed Work Plan, Boxelder Creek Watershed" the Soil Conser- <br /> <br /> <br />vation Service states that Coal Creek flows south through the eastern portion of <br /> <br /> <br />Wellington. I In the document "Boxelder Creek Watershed, Flood Plain Information", <br /> <br /> <br />said agency maintains that the combined 100 year frequency peak flow from both <br /> <br /> <br />Boxelder Creek and Coal Creek amounts to 13,300 cfs in the Wellington area.2 <br /> <br /> <br />Figure II, in the "Watershed Work Plan" document, delineates the extent of flood- <br /> <br /> <br />ing from said peak flow in the Town of Wellington. It is noted that the proposed <br /> <br /> <br />flood waters of both creeks merge inunediately north of the town. <br /> <br />1. "Watershed Work Plan, Boxelder Creek Watershed, Page I <br />2. "Boxelder Creek Watershed, Flood Plain Information, Page 3 <br />