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➢ ESD R067BY024: <br /> Ecological Site Description <br /> -t 11 A C51�,igifl-d <br /> Data Access <br /> V,q-.Ro,,— <br /> tkwrt ,— United States Department of Agriculture <br /> Itepart.Selecitions <br /> Griil.a! Natural Resources Conservation Service <br /> Ecological Site Description <br /> Section 1: Ecological Site Characteristics <br /> Ecological Site Identification and Concept <br /> Site stage: <br /> i, an ESD at Ine PfOV15*nal status represents the lowest tier of documentation mat is releasable to the public.It conlains a grouping of a, <br /> units that respond similarly to ecological processes The ESD contains 1)enough information to distinguish it from similar and associated ecological <br /> sites and 2)a draft state and transition model capiturrrg the ecological processes and vegetative states and community phases as they are currently <br /> conceptualized The provisional ESD has undergone,both quality control and quality assurance prolocnIs It is expected that the provisional ESD vrit <br /> continue refinement towards or approved status <br /> Site name:Sandy Plains <br /> I E-ricigonum effusum;Bouteloura gractlis-CalamoivdfEi"itiolia <br /> (I spreading buckwheat I blue grams-prairie sandi-eed) <br /> Site type.Rangeland <br /> Site ID R0678YO24CO <br /> Major land resource area(MLRA)06713-Central High Plains,Southern Part <br /> Op <br /> MLRA 6TB,EA.ta.COlOraaa <br /> MLRA 67B-Central High Plains Southern Part is located in eastern Colorado.It is comprised of rolling plains and river valleys Some <br /> canyonlands oocur in the southeast portion The major rivers are the South Platte and Arkansas which flow from the Rocky Mmnta!ns I. <br /> Nebraska and Kansas.Other rivers in the MLRA include the Cache[a Poudre and Republican The rivers have many tributaries This <br /> ecological site is traversed by 1-25,1-70 and 1-76,and U S Highways 50 and 287 Major land uses include 54%rangeland,35%croplan <br /> and 2%pasture and haylanci Urban and developed open space,and miscellaneous land occupy approximately 9%of the remainder G <br /> in this area include For,Collins,Greeley,Sterling and Denver Other cities include Limon,Cheyenne Wells,and Springfield l <br /> ownership is mostly pnvate Federal lands include Pamee and Comanche National Grasslands(U S Forest Service) Sand Creek <br /> Massacre National Historic Site(National Park Service),and Rocky Mountain Arsenal National Wildlife Refuge(U.S Fish&Wildlife <br /> Service) State Parks include Cherry Creek and Chatfield Reservoirs and Barr and Jackson Lakes. <br /> This region is periodically affected by severe drought,including the historic"Dust Bowl'of the 1930s Dust storms may form during droul <br /> years, <br /> in windy periods Elevations range from3,400 to 6,000 feet The Average annual precipitation ranges from 14-17 inches per year,and ranges from 13 inches to over 18 inches, <br /> depending on location Prernpitation occurs mostty during the growing season,often during rapidly developing thunderstorms Mean am <br /> air temperature(MAAT)is 48-52'F Summer temperatures may exceed 100'F Wrter temperatures may be subzero,and snowfall van <br /> from 20-40 inches per year Snow cover frequently melts between snow events <br /> 16 <br />