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r .;;; , '41, g \Viir r:rt: ,, \", '> — 1 fr /4-4' 7 i tr-- i 1---- ------"!--- \\N'N ' ciNc\--1\ i 1, �; 1 I J lil s'I\.\\?.*p' —-N;Cyi IV a ,�': - r 2:e _. \ 0 - k �R A fi wM The ��r Y # g' X` v°' +!^•9.y _){ . . Figure 3: Contour Map with Contour Lines and Intervals and Natural Features. The vertical distance between contour intervals affects the land form details that are shown on the map: a narrow separation provides great accuracy and will show minor land form details, such as small ravines, mounds, outcroppings, and swales; larger separations may exclude minor slope variations and minor land form details. The three options to define contour interval(s) for the slope analysis maps used to calculate 25-percent slope include: • Option One: Two-foot contour intervals. Two-foot contour intervals provide a high level of detail showing minor land forms, such as small ravines, mounds, outcroppings, and swales, that would be used to verify compliance with Measure PP. Staff notes that Section 18.76.140.E.2 of the City's H-P-D District (Attachment 3) requires two-foot contour intervals to calculate Weighted Increment Slope. Two-foot contour intervals are also typically used on slope inventory maps and preliminary grading plans provided with development applications, and require the least interpolation between contour intervals. Staff believes that contour intervals of less than two feet suggest an artificial level of accuracy that cannot be achieved. • Option Two: Five-foot contour intervals. Five-foot contour intervals would provide slightly less detail on slope inventory maps and may potentially allow grading over minor topographic features such as small ravines, mounds, outcroppings, and swales. Excluding isolated or