Idaho Administrative Code
Title IDAPA 37 - Water Resources, Department of
Rule 37.03.07 - STREAM CHANNEL ALTERATION RULES
Appendix A - Table 1A
Universal Citation: ID Admin Code A
Current through August 31, 2023
Riprap Gradation Using FWS Method
|
% Finer by Weight (Lbs.) |
Minimum Size (Lbs.) |
Maximum Size (Lbs.) |
|
D100 |
1.33 X D75 |
2.0 X D75 |
|
D75 |
1.0 X D75 |
1.67 X D75 |
|
D50 |
0.67 X D75 |
1.17 X D75 |
|
D25 |
0.33 X D75 |
0.77 X D75 |
|
D0 |
None |
0.33 X D75 |
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