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A combination of meas ures may be appropriate to address erosion and loss of vegetation in less <br />constrained areas along the main corridor path, including: <br />• Where feasible along the main corridor path, create a bark - surface path immediately adjacent <br />to the paved path. This would extend the width of the path without increasing the amount of <br />impervious surface. Due to width constraints, this bark - surface path may not be continuous. <br />The path would also serve as an extension of Pre's Trail from the north end of the Autzen <br />footbridge to the intersection of the main path with the existing Trail. <br />• The planting of native shrubs directly adjacent to the path may serve as obstructions for those <br />traveling off of the paved path, making this option less desirable. The establishment of such <br />shrubs may be difficult as they would be vulnerable to trampling. <br />• Place fencing adjacent to specific locations along the path to encourage individuals to stay on <br />the path or to protect sensitive areas. Fencing placement must address public safety <br />concerns. Fencing can be designed with a rustic /natural character. <br />• In areas where the soil composition and sunlight is adequate to support good grass cover, <br />allow the grass to remain at a height of 6 -8 inches. It was noted that in areas where there is <br />good grass cover and at a relatively tall height, soil compaction and loss of vegetation was <br />minimal. <br />8. Grass Parking Areas around Wistec. The movement of vehicles on unpaved surfaces can <br />cause soil compaction. A majority of the areas where vehicles park is already compacted due <br />to historic plans for additional building sites and these areas are not of great concern. <br />However, once soils are wet from rain, there is a greater chance of disturbing vegetation and <br />creating erosion issues. Some of these impacts were observed as a result of vehicles parking <br />off of paved areas. <br />Recommendation: The City of Eugene will work with Wistec to explore opportunities for <br />minimizing soil compaction from vehicle traffic on grass areas around Wistec. Options may <br />include alternating the ingress /egress to parking area, protecting areas with a soil covering, and <br />enhancing existing turf coverage. As a condition of Wistec's annual parking permit, establish <br />and enforce adequate vehicle setbacks from natural resource areas, including trees, the canoe <br />canal, and Wistec ponds. <br />9. BMX Facility Parking. EVBMX allows football parking and tailgating on their 5 acre <br />leasehold in Alton Baker Park. Soil compaction is an issue surrounding two large evergreen <br />trees within the dirt parking lot of the BMX facility. These trees are potentially being <br />negatively impacted by the movement and parking of vehicles within their Critical Root Zone <br />(CRZ). <br />Recommendation: The City of Eugene will negotiate modifications to the lease with EVBMX to <br />establish and enforce appropriate vehicle setbacks from natural resources, including trees. <br />ABP Monitoring- 2001 Season Summary Page 4 <br />