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<br />with alfalfa hay (.1edicago sativa) during t.e 1979 g-owing season and har- <br />vested during the late sumrer. Although harvest re~rds were not available for <br />this site, similar dry land alfalfa fields in this area of Colorado produce <br />cetween 2000 and 3000 lbs dry weight alfalfa per acre per year (personal <br />ca~rwiication, 1979, Mr. Thomas Darty, Agricultural bctension Agent, :7ontrose, <br />Colorado). <br />Juniper vegetation type. The juniper ootr+iruLity, clx'~racterized by Utah <br />juniper trees (JUniperus osteosperma), ca:~rises 1.80 acres on the study area. <br />Th.{.s type is actually an agricultural sub-type as the herbaceous urcerstory <br />is alfalfa hay meadow. Juniper trees within t'zis agricultural area were <br />cell scattered and thus, do not appear to have any affect on tl:e production <br />and species composition o£ tie understoxy vegetation which is an ai_falfa <br />field. Tree density is 45.7 trees/acre (a total of 59 trees occur within <br />the type) and basal area averages 737.10 cn2. All trees are Utah juniper. <br />Tlus juniper area represents scattered individual trees in an alfalfa field. <br />(Mariah Associates 1979}. <br />Riparian vegetation type. The riparian type comprises 1.93 acres or 1.78 <br />of the tot:a7. study area. The type occurs along an irrigation ditci'i and <br />consists of a small oomra,,,; ty of comron cattail (lyoha lati.folia), baltic- <br />rush (Juncos balticus), and longst~m spikerush (Elexharis macrostachva) and <br />a small tree oomnwnity. The tree commv~ity consists of 11 Chinese e]m <br />(Ulmus parviflora), 13 narrowleaf cottonwood (PO us angustifolia,) and 3 <br />plains cottonanood (PO us sargentii). Total density is 14.5 trees/acre <br />while average basal area is 303.29 cmz. ¢~antitative cover or production <br />estvrates were not made for this typa (Mariah Associates 1979). <br />Data gathered during 1979-1980 wildlife studies at Nucla Mine and site <br />specific information found in the literature are discussed by major wildlife <br />conponents belo~r. a list of vertebrate species positi~•e7.~• indertifie3 for <br />-18- <br />• <br />JUM ~ i t980 <br />(Revised August 2006) Attachment 2.04.10-10-25 <br />