Ordinance No. 20513 - Laserfiche WebLink

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Upperbank/Midbank Habitat (also to be incorporated within areas of development in plant clusters that are large enough to serve as additional habitat for birds and pollinators). The elevation in this zone varies between 408' and 424' and encompasses approximately 1.9 acres. This area should be planted in trees, shrubs, forbs and grasses chosen to fit local microhabitat conditions of sun versus shade, moist versus dry. Species located in the Midbank areas will sometimes need to grow in areas of riprap and steeper banks. In these situations they may need help in establishment such as amending the planting hole with soil and regular watering for several years. Plants would establish more easily in areas where the riprap was removed and the slope of the banks reduced. In general it is recommended that this habitat zone be planted in a more landscaped fashion in areas located closer to the buildings and other development, and then planted as a denser and lusher riparian forest in the areas closer to the river. For example, the areas near Restaurant Row could be planted with native forbs and grasses (possibly augmenting the greenroof pollinator plantings that are recommended for area rooftops), the area midway between the buildings and the river could include groups of native shrubs and small trees and an occasional larger shade tree, while the areas closest to the riverbank could be planted with larger native trees, shrubs, forbs and grasses that are more indicative of riparian forests. This design would increase the visibility of the river and the overall open space from the buildings while increasing the effective width of the Riparian Zone, thus aiding in water temperature regulation. Leaving tree canopy gaps in the taller riparian plantings and /or building viewing platforms will allow people visual access to the river. Tree species could include: Forb and Fern species could include: Acer macrophyllum Aquilegia formosa Arbutus menziesii Artemesia douglasiana Fraxinus latifolia Asclepias speciosa Quercus garryana Clarkia amoena Quercus kelloggii Clarkia purpurea var. purpurea Claytonia sibirica Shrub and small tree species could include: Collinsia grand flora Acer circinatum Collomia grandiflora Amelanchier alnifolia Delphinium menziesii Aruncus dioicus Delphinium trolliifolium Baccharis pilularis Dicentra formosa Berberis aquifolium Erysimum capitatum var. capitatum Ceanothus sanguineus Eschscholzia californica Ceanothus velutinus Fragaria vesca var_ bracteata Corylus cornuta var. californica Fragaria virginiana var_ platypetela Holodiscus discolor Geranium oregarmm Lonicera involucrata Gilia capitata Oemleria cerasiformis Heracleum lanatum Philadelphus lewisii Heuchera micrantha Prunus emarginata var_ mollis Hydrophyllum tenuipes Prunus virginiana var. demissa Iris tenax Rhamnus purshiana Lomatium dissectum Ribes sanguineum Lomatium nudicaule Rubus pary florus Lomatium utriculatum Salix scoulerina Lupinus rivularis Sambucus racemosa Mertensia platyphylla Symphoricarpos albus var. laevigatus Plectritis congesta Viburnum ellipticum Polystichum munitum 21