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I I I, I I I I' I 'I I I, I' I I .' I I I I 002079 survey placed some emphasis on surveying near-shore sites along the reservoir margin because these sites generally receive greater use by the public and, for that reason, may be expected to experience higher levels of weed infestation than upland sites at the project. Because of their importance as public access resources, inspection of the Williams Fork Project campgrounds, boat launches, and access roads was also emphasized. Locations of noxious weeds were identified and mapped as points, lines, or polygons using a handheld Geographical Positioning System (GPS) unit capable of sub- meter accuracy after post-processing. GPS data were collected using the data collection protocol described in Section 2,3. Photographs were taken of representative infested areas to document site conditions, Samples of a few unknown plant species were collected for future identi fication, and voucher specimens were taken of all noxious weed species encountered, Data collected in the field included the following features for each noxious weed site: . Genus and species . Estimated percent cover (I to 100 percent within colony boundary) . Description of site type (exposed soil, invasive, etc.) . Description of surrounding vegetation . Resource risk description, A unique numerical identifier was assigned to each noxious weed site, and this identifier and the corresponding data for the site were entered on a field data form prepared specifically for the noxious weed survey, One data form was completed for each noxious weed site. Upon completion of the field effort, the noxious weed data were transferred from the data forms into a Microsoft Excel spreadsheet for inclusion in the GIS database. 2.3 GPS Data Collection Protocol Equipment The following equipment was used to electronically record location information in the field and to process these data for inclusion in Denver Water's GIS database: . Leica GS 20, handheld GPS unit capable of sub-meter accuracy and equipped with the necessary hardware to collect data for use in a post-processing system . GIS Data Pro software for downloading data to a PC and performing post- processing functions, Field Data Collection GPS data collected in the field for the noxious weed survey consisted of point location information (UTM, X and Y coordinates for each point [node] taken with the GPS unit). Each noxious weed site consists of one or more nodes. Williams Fork Reservoir Hydrodet:tnc Project January 2004 Stelg~rs Corporation Nox\lJUS Weed SUlVey Report Page 3