University of Oregon North Campus Conditional Use Permit Project <br />Riparian Assessment and Management Report <br /> <br />and various native frogs (Rana sp., Bufo sp.), though none were observed during the site visit. Fish and wildlife <br />habitat in the Millrace Slough within the PSA appears to be of lower quality due to the extensive English ivy <br />infestation, degraded flow regime of the slough, and degraded streambank morphology. However, it is expected <br />that some of the specific habitat functions for species listed above are marginally provided along the Millrace <br />Slough part of the PSA. <br />5.0RIPARIAN MANAGEMENT RECOMMENDATIONS <br />Riparian management recommendations are directed towards the City’s Goal 5 Water Resource Conservation <br />Setback (Setback). The Setback protects significant riparian areas, wetlands, and other water-related wildlife <br />habitat areas through a buffer from both the OHWM (120-foot setback for the Willamette River, 50-foot setback <br />for the Millrace Slough) and the TOHB (100-foot setback for the Willamette River, 40-foot setback for the Millrace <br />Slough) (EC 9.4920 \[1\]c1&c2). <br />The following are the primary management recommendations for areas within the Setback shown on Figure 8 in <br />Appendix A. The City’s Water Resources Overlay Zone code for permitted and prohibited uses and exceptions <br />provides the basis for many of these recommendations (EC 9.4930). However, applying these recommendations <br />to upland areas within the PSA would also contribute to enhanced riparian function and value. <br />Protect Water Quality: <br />Remove refuse and encampments to diminish the spread of invasive species, promote bank <br />o <br />stability, and diminish safety issues. <br />Prohibit storage of hazardous or toxic material and the storage of wood, other building material, <br />o <br />vehicles, or machinery. <br />Remove any fill found to be in violation of local, state, or federal regulations by a regulatory <br />o <br />agency. <br />Remove invasive/non-native species to promote the establishment of native species and to <br />o <br />reduce the need for the application of herbicides as a means for invasive/non-native species <br />reduction. A list of non-native, invasive plant species known or likely to occur within the Eugene <br />Urban Growth Boundary (UGB) is included in Appendix D (City of Eugene, 2003). <br />Replace any significant non-native or invasive trees removed within 25 feet of the OHWM within <br />o <br />six months with native tree(s) that will grow to similar size, height, and canopy as the one being <br />removed. <br />Monitor for invasive species, as this can lead to early detection and minimize further spread of <br />o <br />invasive species. As a result, control of is more affordable and efficient. <br />Prohibit pesticide and fertilizer application within the Setback. <br />o <br />Provide signage and pet waste bags to prevent unnecessary chemical drainage into the <br />o <br />waterways. <br />Develop and implement a Pollution Control Plan (PCP) to prevent impacts to water quality. <br />o <br />Revegetation and Habitat Enhancement: <br />A restoration landscape plan should be developed to preserve and enhance the native habitat <br />o <br />within the Millrace Slough and Willamette River riparian zones. The plan should include long-term <br />strategies for landscape preservation, restoration, and enhancement along the project corridor. <br />Revegetate the riparian corridor using native species well adapted to the microclimates of the <br />o <br />Millrace Slough and Willamette River. A list of native plant species for sites at or below 500 feet <br />in elevation within the Eugene UGB is included in Appendix D (City of Eugene, 2003). In addition, <br />Johnson et. al., 2010 provides a list of native plant species recommended for the adjacent riparian <br /> page 12 <br /> <br />