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and Post Mining Cross-Sections. An examination of the cross-sections indicates that the post mining <br />conditions are similar to the premine conditions. <br />The above information demonstrates compliance with the requirements of 4.14.2. These post raining <br />slopes approximate the general nature ~~f the pre-mining topography as demonstrated in 2.10.3(~I1. <br />Post mining Drainage Channels <br />All drainages that are to be disturbed by mining activities will be reclaimed to approximate the pre- <br />mining configuration and [o blend with the undisturbed drainage above and below the area 1:o be <br />reclaimed. The post mining drainage channels will be designed, constructed, and maintained m the <br />following specifications: ~ <br />1. Average stream gradient shall exhibit a concave longitudinal profile; <br />2. Remain in dynamic equilibrium with the drainage basin system without artificial structures; i~ <br />3. Establish or restore the channel to its natural meandering pattern with a stable gradient; <br />4. Provide separation of flow between adjacent drainages; " <br />5. Safely pass the runoff from a 10-year, 24-hour precipitation event; <br />6. Long-term stability of the landscape: <br />' 7. The reconstructed drainage channels will not exhibit any knickpoints. ' <br />• <br />B Revised 2/99 <br />