New Search
DRAFT <br /> • Plant community structure (dominant spp., native v. non, etc.) using five year monitoring <br /> schedule. Five year schedule is assumed to use three permanent macro plots totaling 4,442 <br /> square meters of coverage. <br /> • Mapping and reporting. <br /> Habitat Maintenance <br /> Long term maintenance will focus on maintaining high quality site conditions as defined in the <br /> Eugene City Code <br /> • Maintaining site hydrology (flow, depth, location) through channel management and removal <br /> of woody species. <br /> • Supporting rare plant species through removal of woody species, reseeding and exotic <br /> removal. <br /> • Removal of invasive exotic plant species through hand removal, weed - eating, burning and <br /> mowing. <br /> General Maintenance <br /> Long -term maintenance will concentrate on repair and replacement of infrastructure, working <br /> with the public, the preserve office and operations. Only about 200 feet of fence is included in <br /> this extensive site. There are two boardwalks, one in the trail and another as an overlook at <br /> Balboa. Balboa trails are gravel and pressure treated timber. The Oxbow East maintenance road <br /> is simply cleared of vegetation. There is a 72 foot culvert at Oxbow East , a four foot culvert at <br /> Balboa, and several culverts at Beaver Run. There are also 3 water control units at Beaver Run. <br /> The boardwalk at Balboa has two interpretive signs. <br /> Site Specific Activities - NORTH GREENHILL ASH GROVE UNIT <br /> Background <br /> The North Greenhill Ash Grove unit is at the base and side of Oak Hill and fronts on Greenhill <br /> Road on the east side. It is a new unit where restoration is being actively pursued. Runoff from <br /> Oak Hill provides the majority of water to the wetland. The wetlands cover virtually the entire <br /> site except the hillside. An additional wetland preserve may be established by ODOT to the south <br /> of the property and still other wetlands are being purchased for conservation across Green Hill <br /> road to the east. There is a small commercial development to the north with its parking lot, <br /> otherwise the property is in an undeveloped area. It is also outside the City's growth boundary. <br /> The ash grove at the southeast corner of the site harbors four rare species. <br /> Biotic Survey <br /> Long term monitoring will focus on determining changes in the: <br /> • Wetland hydrology using aerials and annual hydrologist review. <br /> • Area and percent cover of rare plants species (4 rare spp. in ash grove area) using a five year <br /> quantitative monitoring schedule. <br /> • Area and percent cover of invasive exotic plant species using 4 qualitative surveys a year and <br /> five year quantitative monitoring schedule. <br /> • Vascular plant list for the area using five year quantitative monitoring schedule. <br /> 05/08/01 5 <br />