what is underneath in soil and bedrock, adjacent river including bank and bed, existing plant and animal <br />communities, existing features such as the bike path, culverts, hummocks, where several homeless people <br />have lived, boundaries, fences and gates, and existing structures. <br />INCURSION GREENWAY BOUNDARY <br />Proposed development goes over greenway boundary. It needs to be outside of the boundary with a <br />certain setback added. It cannot go into the greenway. <br />GEOLOGICAL ANALYSIS <br />LIDAR UNDERGROUND BEDROCK TOPOGRAPHY <br />At the same scale as the other maps, display a Lidar map that reveals underlying solid formations. <br />Though some might not think it relative to density & design, it shows the solid rock underneath. <br />HYDROLOGICAL ANALYSIS <br />MISSOULA FLOODS & SOIL DEPOSITION <br />You would use the map with a scale of 1" = 50,000 feet to show the vector and velocity of those <br />magnificent prehistoric floods that plucked soil from what is now Washington scablands, carved out <br />N'chi-wana Columbia River Gorge, carried the rich soil all the way into the Willamette Valley, and <br />dropped huge erratic boulders as well. A map at a smaller scale could show the site a bit bigger and have <br />a note indicating approximately how much deposition occurred here. <br />PLOTTING RIVER FLOW SURFACE PLUS FLOODING LEVELS ON TOPO MAP <br />With a 6" topographical interval, now you can show the elevation of the surface of the Willamette River <br />in summer and in winter, and flood events such as 10-year, 100-year, and 500-year flood and how far <br />they'll come up onto the property or neighborhood. <br />ALL WATER DRAINAGE, FLOW ACROSS SITE <br />Use arrows of varying sizes and lengths to indicate waterflow across and underneath site. <br />VEGETATION ANALYSIS <br />VEGETATION INVENTORY <br />As stated before, a full inventory is needed. Individual plants should be mapped on the drawing and <br />keyed to their identity and size. <br />ASSIGNING HIERARCHY OF IMPORTANCE <br />8" diameter at breast height is one measure, but by itself is an insufficient measure. You should include a <br />hierarchy, which would place cultured introduced plants at the low value and key species representing the <br />native plant communities as a much higher value, without reference to size. As an example, an 18" DBH <br />Norway Maple, an invasive exotic, would be of much less value than a sapling Oregon White Oak. Plant <br />and plant-community rarity and value is more important than the solitary DBH measure. In this scenario, <br />all Oregon White Oak and California Black Oak would be preserved; not a one would be removed, even <br />if they were only seedlings. This goes not only for trees, which we seem to be exclusive about. It also <br />applies to shrubs and groundcovers. Rare and endangered species would be given the highest value. If <br />you were to find a patch of Kincaid's Lupine on site, it would remain undisturbed, and an appropriate <br />buffer would be included around it. The plan might even require additional plantings of the Lupine to <br />create connective corridors for Fender's Blue Butterfly. <br />INVASIVE SPECIES CONTROL <br />There are a number of introduced plants that have bad manners; they are out of control. They are <br />reproducing and spreading without competition and inhibition, and are prolific. Two examples would be <br />Himalayan Blackberry, which is choking large parts of the property and exists virtually everywhere on <br />632 <br />