2009-10-01_PERMIT FILE - C1994082A ‎(2)‎

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 10/1/2009
• Section_Exhibit Name: Tab 20 Backfilling and Grading
• Media Type: D
• Archive: Yes

• For channels lined with rock riprap, the PADER Method is used to estimate the required rock size.
However, based on SCC experience, the PADER Method seems to underestimate the required rock size,
so SCC adds 3 inches to the rock Deo size specified by PADER for design purposes. For further protection
of the channel bed, a layer of geotextile fabric is installed prior to placement of the riprap.
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TR-37 ga Revised 02/08