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X003 - 09/ ~~-/-~3 Wetland Evaluation at the Duckworth Property July 2003 Prepared by: Warren R. Keammerer, Ph.D. Keammerer Ecological Consultants, Inc. -~p~ 5858 Woodbourne Hollow Road Boulder, Colorado 80301 Introduction This report presents the results of a wetland delineation at the Lafarge Duckworth Property site in Weld County, Colorado. The wetland delineation s`ETJ focused on an area along and in the vicinity of Idaho Creek. In addition to mapping wetlands, an assessment of the status of Ute Ladies Tresses orchid (Spirnntltes diluvinlis) and Colorado Butterfly plant (Gnus neomexicnnn ssp. coloradensis) was conducted. Field work for this project was conducted in late June-July 2002. Methods Wetlands were delineated using a combination of air photo interpretation and field checking. An aerial photo base map at a scale of 1 inch equals 200 feet was used to evaluate the location of wetland areas within the study area. These areas were visited in the field and were evaluated relative to wetland status using the U. S. Army Corps of Engineers (1987) wetland delineation manual. Boundaries of delineated wetlands were flagged in the field and were subsequently surveyed using standard surveying procedures. Reed (1988) was used as the basis for categorizing the plant species observed in the wetland areas. In cases where species were not listed in Reed (1988), wetland indicator status was assigned on the basis of how the species tend to grow within the region. These assignments were based on the experience of the author of this report. As part of the field work, all observed species occurring within wetland areas were recorded. Field searches and compilations of the species lists aided in the assessment of the potential status of the occurrence of Ute Ladies Tresses Orchid and potential habitat for this species. Part of the field work for this project was conducted in late July (2002) at a time when Ute Ladies Tresses Orchid would have been in flower.