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PERMIT 79-177, MID-TERM REVIEW MAY 13, 1985 PAGE FOUR However, recognizing that a valid concern exists relative to stabi- lizing long, steep, and uninterrupted slopes, CYCC will propose that in certain instances, designed diversion ditches might be required. Since all available information exists that the conditions in Area 1 is the only problem area identified to date. CYCC proposes to use this site as a standard to determine the potential need of an area to be treated with diversion ditches. Since slopes are as high as 45 percent with an average of over 30 percent and slope lengths av- erage approximately 1,200 feet, CYCC agrees to construct designed diversion ditches on all future reclaimed slopes that approach the average slope percent and length of the Area 1 site. Prior to com- pTetion of fall reclamation, CYCC will commit to providing the CMLRD with detailed designs and construct these diversion ditches prior to spring runoff. 2. The rill and oully stabilization plan in the aoolication states that rills and gullies will be blocked and treated to allow stabilization, or regraded as a last alternative. In the February, 1984 response, CYCC submitted information on gully occurrence in adjacent undisturbed lands. In order to clarify CYCC'_s responsibility with regard to rill and gully stabilization, the following issues should be addressed: a. Under what circumstances does CYCC intend to backfill and grade versus block and treat excessive rills and gulliesY RESPONSE: The treatment of rills and gullies is most effectively accomplished by controlling the water and preventing it from concentrating which creates the gully. Techniques utilized by CYCC to control water include diversion ditches along haulroads and contour furrowing. The gullies will be blocked and treated once overland water flow has been controlled and sufficient topsoil and planted grass remain