Resolution No. 4793 - Laserfiche WebLink

Home Browse Search

STUDY AREA CHARACTERISTICS Phosphorus in stormwater drains is ILkely a combination of runoff containing fertilizers, soaps, animal feces, soil erosion, atmospheric deposition, and potential leakage of hookups from adjacent sewage pipes or industrial sources. Conclusion As the Willamette River flows through the study area, it expe~ences increases irt pollutants that can be tied to human activities, but concentrations are far below state water quality standards (E. coil and total zinc) or levels of concern (nitrogen and phosphorus). Nevertheless, nitrogen concentrations have been increasing in recent years. Arsenic, copper, lead, zinc, E. co[i, nitrogen, and phosphorus are, on average, statistically lower in the WLllamette River upstream of the Eugene-Springfield urban growth area than at downstream locations. 2.2.7 Rora and Fauna This section provides a general description of wildlife species and habitat conditions in the vicinity of the ]VIWMC BMF, SIWF, Biocycle Farm,' and WPCF. Because of the potential for expansion of these facilities, this section focuses on habitat in and along the stretch of the Willamette River in the immediate vicinity of the above mentioned facilities (Figure 2.2.7-1). Habitat Types in the Eugene ~letropolitan Area According to the Aquatic and Riparian Habitat Assessment for the Eugene-Springfield Area (MECT, 2002), greater than 85 percent of the land area immediately (within 100 feet) surrounding the Upper Willamette River in Eugene (River Reaches 15-21) is vegetated. Of vegetated land, approximately percent supports trees, percent supports the 75 hardwood 13 shrubs, and 13 percent is pastureland, fields, or grass. Approximately 14 percent of land along the Upper Willamette River is not vegetated, with 5 percent of total riverside land covered by gravel bars and greater than 9 percent of the land developed (Table 2.2.7-1; Figure 2.2.7-2). TABLE 2.2.7-1 Percent Vegetated Areas, Developed Areas, and Graver Bars Within 100 Feet of the Upper Willamette River (River Reaches 15-21), Eugene, Oregon1 MWMG Facilities Plan, Eugene-Sp#ngfield Area Description Percent (%) of Total Area Hardwood trees 64.t Shrubs (including Willow) 10.8 Grass, pasture, fields 10.7 Total Vegetated 85.6% Gravel Bars 4.8 Developed Areas 9.5 Total Nonvegetated 14.3% Total 100% 1Adapted from METe, 2002. MW~C_2 0_REV23.DOC 2-23