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Section E16.^1 (d) Continued. • Permanent Diversion Structures. The features of the fill design are shown in Exhibit 9, Excess Spoil. As specifically provided in Sections 816.111 and 816.113, all disturbed areas will be vegetated as soon as construction is completed in order to stabilize the soil surface. (e) The disposal areas shall be located on the most moderately sloping and naturally stable areas available as approved by the regulatory authority. If such placement provides additional stability and prevents mass movement, fill materials suitable for disposal shall be placed upon or above a natural terrace, bench, or berm. The sites selected for the disposal of the excess spoil have been chosen with the intention of maximizing coal recovery and minimi- zing the amount of disturbed area. The sites represent the most stable and moderately sloping areas available for disposal and were • chosen in order to avoid affecting additional drainage areas. This selection for the excess spoil disposal sites minimizes the total affected acreage by avoiding the disturbance of otherwise undis- turbed drainage basins. The use of terraces, benches, or berms is outlined in Exhibit 9, Excess Spoil. (f) The spoil shall be hauled or conveyed and placed in horizontal lifts in a controlled manner, concurrently compacted as necessary to ensu^e mass stability and prevent mass movement, covered, and graded to allow surface and subsurface drainage to be compatible with the natural surroundings and ensure a long-term static safety .`actor of 1.5. The excess spoil to be placed in disposal structures will be executed from the boxcuts using the Piarion 204 Shovel so that proper spoil disposal can be achieved. The shovel will load rear end dump trucks which will haul the spoil to one of the two disposal sites. The trucks will dump the spoil to form horizontal 816-90