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., - - -~~r <br />•916 Wiltshire Ave. • Fort Collins, Colorado 80521 • (970) 493-4394 <br />September 23, 1997 <br />Bill Fehr <br />Agile Stone Systems, Inc <br />6435 Pontiac Court <br />Englewood, CO 80111 <br />Dear Bill <br />At your request Cedar Creek Assoaates, Inc. revisited Agile Stone Systems, Inc.'s Parkdale Permit Area <br />on September 14, 1997 to determine the eMent of leafy spurge (Euphorbia esula} infestation on the <br />property. Previous field surveys concluded by Cedar Creek in April 1997 identified small inclusions of <br />leafy spurge, primarily along Tallahassee Creek, but did not specifically address the total extent of i[s <br />presence. <br />The purpose of this follow-up survey was to determine the distribution and extent of leafy spurge over the <br />entire permit area. The field survey consisted of walking or driving transacts to provide a visual overview of <br />the entire property and to identify areas where leafy spurge was present. In areas where leafy spurge was <br />located, the approximate size of the infestation area was estimated by pacing, and the percent cover <br />provided by leafy spurge within each growth area was determined by ocular estimates. The following text <br />aril attachments (Table and Map) provide a summary of the findings. <br />• In general, the September 14th survey confirmed Cedar Creek's findings from the April 1997 site visit. <br />Leafy spurge is present primarily as small growth pockets along the embankment areas of Tallahassee <br />Creek. The approximate distribution and extent of leafy spurge within the property is graphically portrayed <br />on the attached map. A site by site summary of the extent of leafy spurge presence is summarized in the <br />attached table. Overall leafy spurge is not a dominant spaces in the permit area, but within the sites where <br />the weed was present, total cover contributed by leafy spurge could be as high as 70 percent. Within the <br />Tallahassee Creek floodplain, leafy spurge was found primarily along the more protected portions of the <br />stream embankment where either higher topographic position or stands of other vegetation, especially <br />woody species, provide some protection from scouring stream flows. Leafy spurge was also present <br />within the seek floodplain on alluvial beaches that are slightly elevated above the primary stream channel. <br />Except for three sites outside of the Tallahassee Creek floodplain, no leafy spurge growth areas were <br />located within the upland portions of the properly. These three areas are identified as sites 17, 18, and 22 <br />on the ariached map. These three growth sites were topographic depressions within or adjacent to <br />irrigation ditches in upland pasture areas. <br />Bill, this letter summarizes the findings of the September field survey. A leafy spurge control plan will be <br />developed and submitted in the near future. If you have any questions or require addRional information, <br />please give me a call. <br />Sincerely, <br />trJElDAIt 4rR961~ Affi80CIIA4&8, INC. <br />T. Michael Phelan <br />Prindpal <br />enclosures <br />