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Middle Amazon Creek <br />D. Plant Communities: Existing Conditions & Guidelines for Tree and Shrub <br />Plantings <br />1. Fairgrounds to Chambers <br />a) Existing Conditions <br />This part of the creek has limited ability to meander. The last part is constrained between private <br />property and pathways. There are just a few trees and shrubs, mostly willows and non - native <br />blackberries. In the woody understory layer, there are no associate species. <br />WILLOW — RIPARIAN FOREST <br />Canopy <br />Dominant species <br />• Salix lucida ssp. lasiandra Pacific willow <br />Associate species <br />• Acer macrophyllum Big -leaf maple <br />• Alnus rubra Red alder <br />• Fraxinus latifolia Oregon ash <br />Woody UnderstorX <br />Dominant species <br />• Crataegus douglasii Black hawthorn <br />• Salix spp. 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 />• For the upper and the top bank, mix different shrubs and trees in a cluster. These clusters <br />should be spaced to allow for any required mowing. See diagram below. <br />• Do not plant more than four trees of one species in one cluster. <br />• Spaces between the clusters will be mowed. <br />• Between Polk Street and Chambers Street, trees should be planted only on the top of the <br />bank. <br />• Shrubs and small trees may be planted on the lower and upper bank, but should be tightly <br />clustered near trees. Clusters should be spaced 50' -75' to allow mowing between them. <br />• Willows may be planted along the entire lower bank near the water line. <br />