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Snyder Quarry <br />Weeds and Reclamation Work <br />by <br />Mark A. Heffner, Ecologist <br />RECEIVED <br />JUN 0 9 2003 <br />Southwestern Ecological Services Division of Minerals and Ceolagy <br />May 5, 2003 <br />Background: It has been known for some time that the Snyder Quarry site contains some <br />noxious weeds. The presence of noxious weeds is not particulazly uncommon on mining sites, <br />but Colorado law requires such weeds be controlled. On May 2, 2003, an inspection of the site <br />was performed by myself and B.J. Fuller of Castle Concrete Company. During this inspection, <br />the primary emphasis was to identify the species and locations of the primary noxious weed <br />species and to define the extent and pattern of the infestation so control measures can be taken. <br />Also, examination of the reclamation work at the quarry and along the access road was done. <br />The report is divided into two parts. The first part will deal with weeds and the second <br />part with suggestions on reclamation work that could be done. <br />Weed Infestations <br />General Condition: Although noxious weeds are certainly present at the site, the extent of those <br />weeds is not as great as it could be. In general it appears most of the weeds are confined to the <br />eastern portions of the site in the vicinity of the quarry entrance. Some weed growth was also <br />found along the access road. Several species of weeds were found at the site and some are <br />particularly tenacious and need to be dealt with before they spread further or become a much <br />more serious problem. Two species in particular aze of concern -Diffuse Knapweed and Canada <br />Thistle. It appears the latter is more serious than the former, but both have populations that are of <br />serious sizes. Several other noxious weeds were also found, but they do not have large <br />populations and do not seem to be expanding very rapidly. Although leafy spurge was previously <br />found, no evidence of this species was found during this inspection. That does not mean it has <br />died out. The season is still early and it may not be very evident yet. Further examinations for <br />this species should be done in late Mayor early June to determine if it is still present on the site. <br />Weed Map: Included in this report is a map showing the primary locations of weed <br />populations. Following is a description of the locations identified on the map. <br />Snyder Quarry Weeds Survey Report - May 2003 Page 1 <br />