On the topographic map in Figure 43-3, determine the extent of inundation for the 20-year flood along Cache Creek that you calculated in problem 8:
(a) Convert your flood level height in problem 8 from meters to feet (the measurement units used on the map):
Water height of 20-year flood: _______ feet
(b) Using a blue pencil, shade in the extent of the 20-flood on the map. Note that elevation of the stream gage is 1534 feet and that dashed lines are 20-foot contours.
(a) 13.5
(b) 
Figure 43-3: Portion of USGS “Hough Springs, California” quadrangle (enlarged to approximately scale 1:8000; contour interval 40 feet; dashed lines are 20-foot contours; Nc).
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