Laserfiche WebLink
<br />velocity, in inches per second, is expected at the nearest residential structure? <br />Will any temporary or permanent seismic monitoring systems be installed? How will <br />rock fall into Williams Canyon from blasting be prevented? <br />RE~ONSi=: Danages to adjacent property as a direct result of blasting at the <br />quarry have never been substantiated. Standard low shock blasting techniques are <br />always used at the quarry with adequate delays and other methods to greatly reduce <br />the shock. Some of the complaints stated in the objection letters are unfounded <br />assertions which would not be allowed even when blasting far from residential areas. <br />Furthermore, it takes very little shock to rattle a window, but it takes severe <br />shacks to damage"concrete foundations. Seismic monitoring systems are being <br />considered far installation at various locations on surrounding lands. As further <br />evidence of the lack of shock damage, no damage has ever occurred to any of the <br />delicate formations in the Cave of the Winds which is gnly about 2400 feet from the <br />operation. <br />As far as fly rock damaging any houses, a rock would need to fly over a half <br />mile to reach the nearest house and with the blasting techniques used in the quarry <br />Cand at all the other quarries) it is only slightly more likely a house in Cedar <br />Heights would be hit by a rock from this quarry as the probability the same house <br />would be hit by a meteorite. <br />As has been done on the South Knob at the Queen's Canyon Quarry, the <br />prevention of rock fall into the canyon as a result of blasting is accomplished by <br />using very small shots that sirtply fracture the ground and throw little if anything <br />into the air. Furthermore, rock fall will occur by the path of least resistance <br />which would be to the east, away from the canyon. <br />ITEM 12 _ Please define "small areas" in the sentence "Salvage of soil generally <br />will occur in a small area at a time" that occurs in the second paragraph of page <br />13. <br />RE~ON~: The area involved in the removal of soil prior to mining is <br />discussed in the next paragraph. This removal waald amount to between one and three <br />acres. When most of that is mined, at least initially, the soil salvage operations <br />would move ahead of the mining thus allowing virtually no loss of the soil. <br />ITEM 13 -_ Near the bottom of page 13, a sentence reads "Only those stockpiles which <br />we expect to be in place over a summer season will be seeded." How much topsoil is <br />expected to be seeded for this reason? <br />RESPONSE: This cannot actually be determined unless the entire area is <br />scheduled for mining on an area by area basis. Such precise planning is impossible, <br />because mining schedules are dependent on product demand. The point of this <br />sentence is that whenever soil is not immediately replaced At`ID will need to be <br />stored for a period of time which exceeds the period of time during which the growth <br />would become established, the soil will be seeded. There is no point in seeding a <br />topsoil stockpile which will be moved in a couple of months. Not only would the <br />vegetation be ineffective at protecting the soil, but such a new pile will <br />experience little erosion anyway. The surface does not "seal" to a point where <br />runoff becomes a problem until the pile has been subjected to several rainstorms. <br />SNYDER N'rl AhFTIDhENT ADEQIWCY RESPQVSES MAY 22, 1989 PACE 4 <br />