2017-02-02_PERMIT FILE - C1982056A ‎(4)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 2/2/2017
• Doc Name: Drainage and Sediment Control System Design
• Section_Exhibit Name: Exhibit 49S 6R 7R Thickener Underflow Boreholes and Pipeline-Design Drawings
• Media Type: D
• Archive: Yes

USDA NRCS 2012 Fact Sheet - rock check dam
Figure I - Typical rock check structure
Slope Rock up to top of Bank and
2' / Kev into sides at least 4'
Level Crest with Lenath =1/3 Channel Width
3'
3 yx
?iyk qac, u
1 Y, y 9-12° Rock Riprap fl
wig
<s'tiaa
,�l �, ddb •a ��L.
H
2'
Figure 2 - Typical cross section of rock check structure
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