Slope table

From LID SWM Planning and Design Guide
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Percent Slope Horizontal/Vertical
(slope gradient)
Degrees Slope
1 100 0.6
2 50 1.1
3 33.3 1.7
4 25 2.3
5 20 2.9
6 16.7 3.4
7 14.3 4.0
8 12.5 4.6
9 11.1 5.1
10 10 5.7
11 9.1 6.3
12 8.3 6.8
13 7.7 7.4
14 7.1 8.0
15 6.7 8.5
16 6.3 9.1
17 5.9 9.6
18 5.6 10.2
19 5.3 10.8
20 5.0 11.3
21 4.8 11.9
22 4.5 12.4
23 4.3 13.0
24 4.2 13.5
25 4.0 14.0
26 3.8 14.6
27 3.7 15.1
28 3.6 15.6
29 3.4 16.2
30 3.3 16.7
31 3.2 17.2
32 3.1 17.7
33 3.0 18.3
34 2.9 18.8
35 2.9 19.3
36 2.8 19.8
37 2.7 20.3
38 2.6 20.8
39 2.6 21.3
40 2.5 21.8
41 2.4 22.3
42 2.4 22.8
43 2.3 23.3
44 2.3 23.7
45 2.2 24.2
46 2.2 24.7
47 2.1 25.2
48 2.1 25.6
49 2.0 26.1
50 2.0 26.6
51 2.0 27.0
52 1.9 27.5
53 1.9 27.9
54 1.9 28.4
55 1.8 28.8
56 1.8 29.2
57 1.8 29.7
58 1.7 30.1
59 1.7 30.5
60 1.7 31.0
61 1.6 31.4
62 1.6 31.8
63 1.6 32.2
64 1.6 32.6
65 1.5 33.0
66 1.5 33.4
67 1.5 33.8
68 1.5 34.2
69 1.4 34.6
70 1.4 35.0
71 1.4 35.4
72 1.4 35.8
73 1.4 36.1
74 1.4 36.5
75 1.3 36.9
76 1.3 37.2
77 1.3 37.6
78 1.3 38.0
79 1.3 38.3
80 1.3 38.7
81 1.2 39.0
82 1.2 39.4
83 1.2 39.7
84 1.2 40.0
85 1.2 40.4
86 1.2 40.7
87 1.1 41.0
88 1.1 41.3
89 1.1 41.7
90 1.1 42.0
91 1.1 42.3
92 1.1 42.6
93 1.1 42.9
94 1.1 43.2
95 1.1 43.5
96 1.0 43.8
97 1.0 44.1
98 1.0 44.4
99 1.0 44.7
100 1.0 45.0