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• DISTRIBUTION WITHIN THE PERMIT AREA <br />At Agile Stone Systems, Inc.'s request, Cedar Creek Assodates, Inc. surveyed the Parkdale Permit Area <br />on September 14, 1997 to determine the extent of leafy spurge infestation on the properly. Previous <br />field surveys concluded by Cedar Creek in April 1997 identified small inclusions of leafy spurge, primarily <br />along Tallahassee Creek, but did not spec'rfically address the total extent of its presence. <br />The September survey was conducted 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 estimate. The following text <br />and attached table and map provide a summary of the findings of the survey. <br />Leafy spurge is present primarily as small growth pockets along fhe 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 species in the permit area, but within some sites <br />where the weed was present, total cover contributed by leafy spurge was estimated as high as 70 percent. <br />• Within the Tallahassee Creek floodplain, leafy spurge was found primarily along the more protected <br />portions of the stream embankment where either higher topographic position or stands of other <br />vegetation, especially woody species, provide some protection from periodic scouring stream flows. <br />Leafy spurge was also present within the seek floodplain on alluvial benches that are slightly elevated <br />above the primary stream channel. Except for three sties outside of the Tallahassee Creek floodplain, no <br />leafy spurge growth aeeas were located within the upland portions of the property. These three areas are <br />identified as sites 17, 18, and 22 on the attached map. These three growth sites were topographic <br />depressions wthin or adjacent to irrigation ditches in upland pasture areas. <br />MANAGEMENT CONSIDERATIONS <br />Control of leafy spurge is possible, but only with aggressive and continuing efforts. The four methods <br />available to manage leafy spurge include: physical control, plant competition, biological control, and <br />chemical control. Aspects of these four methods were reviewed and evaluated with respell to their <br />applicability to infestation sites in the permit area. <br /> Physical control methods include cultivation, mowing, and burning. Cultivation is usually used on <br />. croplands where few other options for control are available . Cultivation and mowing would not be <br />2 <br />