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degrees from horizontal. The azithmetic average is 40 degrees. The reported nat which the stockpile was constructed approximates 30 degrees or approximately 60% . The author discussed the construction of the stockpile with Mr. Schmall. He ins stockpile was constructed by L.G. Everest (operator of the quarry) hauling 8"x0 rock stockpile using wheel loaders and dumping [he rock from the top of the stockpile t top of the stockpile flat. He indicated that the stockpile was constructed From the tol the east. This indicates: 1) the vegetation was probably not removed from the slope was probably not removed from the slope; 3) the slope was probably not leveled; 4 probably not compacted; 5) the slope was probably not keyed to receive the stockl stockpile was constructed in one lift of up to 60 feet in depth. Mr. Schmall concurred slope had not been prepared. This appears to be confirmed by reviewing the geotechnical logs from the stability s the upper portion of the stockpile to be more compact, and the bottom (5 feet and bel DPT (Denver Penetration Test) values in the upper portion ranged 100, 19, and 54 at 27, and 19 a[ 2.5 feet, and 6, and 9 at 5 feet. The DPT values correlate to SPT (Stan[ Test) values by dividing DPT value by 2 to yield approximate SPT value (accordi Withers). The upland drainage crosses the stockpile at two locations. At both locations the st erosion as a result of the recent? lazge precipitation event (reported by Mr. approximately 5" of rain in a short period of time). The western drainage crosses the north to south, (the shortest distance) and has caused some erosion to the face of the eastern drainage encounters the stockpile and is conducted along the crest of thi approximately 150 feet before it is conducted down the slope of the stockpile. This dr and crossing exhibits considerable erosion. The long-term stability of the stockpile appears to be adversely affected by these stockpile crossings should be constructed to conduct the 100-year event, and they with rip rap or other method to protect the crossing if the material is not removed. slope upon Gated that the ~ the top of the ~n grading the progressing to 2) the topsoil the slope was le; and 6) the hat the natural ly that shows to be loose. surface, 25, d Penetration to Mr. John :kpile exibits :hmall to be [ockpile from ockpile. The stockpile for naee channel ges and the be armored The combination of poor foundation prepazation and lack of compaction during p acement, and conducting water along the top of part of the pile would seem to negatively impact the factor of safety reported by Geotechnical Engineering Group. The slippage plane to be ev uated should likely be the fill/soil contact that is complicated by the presence of vegetative matter an soil. Because of the observations mentioned above, and the issues raised by Mr. Pendl ton and Mr. Sorenson of the Division, these inspectors concur with the staff decision to deny the ap al. If [he stockpile is to remain on site, measures to add to the stability should be cons dered. Such measures could include buttressing the toe of the slope with boulders, buttressing the to of [he slope with properly placed and compacted fill to reduce the overall slope, or other suitable easures that would minimize the effect on the existing vegetation.