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5. Provide designs for the Pit No. 4 intermediate ditch discussed <br />on page 4 or commit to its removal during the upcoming <br />construction season to show compliance with Rules 4.05.3(4) and <br />4.05.3(6). <br />6. Barfield, Warner, and Haan's redbook indicates that fine sandy <br />loams can tolerate velocities of 2.5 fps from sediment laden <br />waters. Therefore, all portions of the ditches except 4-1-A <br />must be rip-rapped to prevent erosion. <br />I would also point out that field observations do not appear to <br />support the argument in the submittal that Ditch 4-2-C is <br />stable. This reach fails adjacent to areas of deposition <br />identified in the enclosed May 15, 1991, inspection report. <br /> <br />Please call if you have any questions. <br />Sincerely, <br />C~~ <br />vC/ <br />Catherine W. 8egej <br />Reclamation Specialist <br />CWB/eke <br />Enclosure(s) <br />cc: Jerry Nettleton, ACZ <br />9523E <br />r, <br />U <br />