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boundary and had caused very minor damage to the hillside, damage which was rapidly <br />repairing itself. <br />• Further down the drainage and a distance of 25 to 175 feet beycnd the permit <br />boundary (but still on Castle Concrete land) a zone of large boulder=_~ was noted. <br />Some of these boulders could be fal'ly detected on the 1977 aerial F~hoto and <br />therefore were of either natural origin or originated as a result of old mining. <br />Fbwever, the main mass of the boulders were of recent origin. One boulder even had <br />a drill hole in it which was of appropriate size to clearly indicate it had come <br />from recent mining. It was estimated that about 100 to 200 tons of rock was located <br />in the bottom of the drainage. <br />Examination of the slope above the bottom of the drainage showed minor to <br />moderate damage. About 6 to 12 full size trees had been torn from the ground and <br />had subsequently died. I-bwever, it was also noted that most of the vegetation on <br />the hillside, unlike the hillsides to the side of the location where the racks had <br />rolled, was occupied mostly by Gambel Oak and therefore damage was not as severe as <br />it would have been had the rocks rolled through a more forested area. <br />6rouing among the rocks were various shrubs which indicated, by examination of <br />the recent internodes, they had gone through only one growing season since the <br />damage occurred to their structures. The vegetation therefore indicated a probable <br />• date of occurrence of sometime prior to April or May 1968 but probably not before <br />about September 1967. There is a slight chance the spillage occurred between <br />September 1966 and May 1987, but growth indications an the plants do not indicate <br />this to be very likely. Furthermore, in 1966 and 1987, mining near the west slope <br />was just beginning and therefore the probability of the spillage occurring then was <br />very low. Furthermore, it was known that the equipment operator which had been <br />caught improperly moving rock had done it sometime between September 1987 and May <br />1968. <br />Further down the drainage the zone of large boulders abruptly ends, except for <br />one large rock which rolled dawn the drainage to a location about 50 feet on to Cave <br />of the Winds property. It is estimated this rock weighs between 5 and 10 tans. <br />No rocks were detected further down the drainage or in the bottom of Williams <br />Canyon. The canyon was traversed, after obtaining permission from the Cave of the <br />Winds, from the location of the last large rock all the way to the road and no <br />further spillage could be detected. One rather strange tree kill was noted below <br />the cliffs to the west of Phase 1 and at the bottom of a long talus slope. It is <br />not known how this tree was broken off about 5 feet above the ground, but it is <br />r1 <br />CORRECTIVE ACTION PLAN SNYDER ROCK SPILLS PAGE 3 <br />