The sediment basin from Problem 6 (attached) will include both a conventional riser-type principal spillway and a separate emergency spillway. Using the attached elevation vs. storage rating curve for the proposed sediment basin, establish the following elevations to the nearest 0.1 ft:

1. Principal spillway crest
2. Permanant pool level

Note: either show ruler drawn coordinate lines of these two points on the chart or show linear interpolations from the table

Elevation (ft). Storage (Ac-ft)
44.9 0
45 0.001
50 0.232
55 1.000
60 2.652
65 5.414

(problem attached)