10412 ROSEWOOD AVE ROSEWOOD PARK WHOLE SITE DEVELOPMENT 2017-04-07

BOUNDARY DETEELNINATION FINDQIGS On-site Wetlands: The majority of the on-site wetlands are immature forested. In the stream channel there is bare soil with no vegetation. Vegetation in the on-site wetlands is comprised of red alder (Alnus rubra)FAC in the overstory, alon� with creeping bentgrass (Agrosris alba) FAC, and field horsetail (Equisen�m nrvense)FAC in the understory. The dominance of species rate "facultative" or wetter, thus indicating that a hydrophytic vegetative community is present in the areas mapped as wetland. The soils within the stream channel are very dark grayish brown (2.SY 3/2) s:uid. 5oils in the riparian wedand are very dark gray (10 YR 3/1) loam to a depth of l 1". Below this is a grayish brown (2.SY 5!2) sandy loam. It appears that the area mapped as wetland is flooded, ponded, or saturated long enough during the growing season to develop anaerobic conditions in the upper part of the soil. The wetland area appears to be samrated to the surface for a consecutive number of days greater than or equal :o I2Sco of [he growing season, thereby meeting the criteria for wedand hydrolo;y. It appe:irs that vegetation, soil, and hydrolo�ic criteria are all me[ for the on-site portion of this wedand. Non-Wedand Areas: Typical vegetation in the upland areas oF the site is comprised red alder (Alnus rubru) FAC, salmonberry (Rubus specrubilis) FAC+, vine maple (Acer circinanun) FAC-, sword fern (Polysrichmn nriuiir�un) FACU, and false lily of the valley (Maianthemum dilntnt�an) FAC. Although the overstory is domina[ed by species rated FAC the understory is dominated by species rated FAC or drier. Typical soils in the upland areas of the site are dark brown ( lOYR 3/3) loam ro a depth of 18 inches below the surface. The soil was dry at the time of investigation. Soils sampled in d�e areas mapped as non-wedand do not appear ro be flooded, ponded, or saturated •long enough during the growing season to develop anaerobic conditions in the upper parc, and therefore do not appear to meet wetland soils criteria.