New Search
Upper Amazon Creek <br /> b) Guidelines for Tree and Shrub Plantings <br /> This reach, from Snell Avenue to Fox Hollow Road, does not include guidelines, since it is <br /> dominated by natives and already has a well - developed riparian forest. It may revegetate <br /> passively. <br /> 3. Fox Hollow Road to Hilyard Street <br /> a) Existing Conditions <br /> There is fairly low plant diversity in this reach, with a mix of some native and many non - native, <br /> invasive species. The most frequent plant is willow. The trees and shrubs are mostly on slopes. <br /> The top of the bank is mowed annually. <br /> WILLOW - COTTONWOOD RIPARIAN FOREST <br /> Canopy <br /> Dominant species <br /> • Populus balsamifera ssp. tricho. Black cottonwood <br /> • Salix lucida ssp. lasiandra Pacific willow <br /> Woody Understory <br /> 1411) <br /> Dominant species <br /> • Crataegus douglasii Black hawthorn <br /> • Salix hookeriana • Hooker's willow <br /> • Salix fluviatilis Columbia river willow <br /> • Salix scouleriana Scouler's willow <br /> • Salix sessilifolia Soft - leaved willow <br /> • Salix sitchensis Sitka willow <br /> b) Guidelines for Tree and Shrub Plantings <br /> Notes <br /> • Plan for a 400' section <br /> • Plants not planted in clusters should be planted along the whole section in an even <br /> spacing. <br /> • If a species is included in more than one planting zone, a single cluster across both zones <br /> can be displayed. <br /> • To allow adequate conveyance, NO plants should be near bridges. Leave a distance of <br /> approximately one bridge width on either side of the bridge unplanted. Leave 20 feet <br /> unplanted centering on each outfall. <br /> 10 <br />