PERMFILE57953

• Permit No: M2004025
• IBM Index Class Name: Permit File
• Doc Date: 6/10/2004
• Doc Name: Adequacy Response
• From: Grew Lewicki and Associates
• To: DMG
• Media Type: D
• Archive: No

The details of the SCS Tractive force design procedures are presented in Appendix B -North Fork
of the Gunnison River data.
Results show that boulders are stable for the cases of the wall and the bottom, however, since the
water in a large flood will hit the wall at an angle of between 60 to 90 degrees, scour of the em-
bankment earth under the large rock is a concern. In order to address this, the existing rock or con-
crete slabs will be imbedded in the bank for depth of at least 3 feet and the large boulders will be
placed on top of this rock. If the existing rock is not of sufficient size (at least 3 ft diameter) ,then
additional rock must be imported for this bedding layer. See diagram below for a depiction of the
design:
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North Fork Pit Mazch (M 24