6.4. SR 02-20-2007 - Laserfiche WebLink

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Tiller Corporation Elk River and Livonia Ouarries Noise Assessment 2.2.2. 2007 and Future Operations In 2007, it is assumed that the crushing complex will move towards the SSW along with the mine face. The shielding of some noise from the complex by existing topography is assumed to be removed and a berm constructed with a peak elevation of 1110 feet as shown in Figure 2.4. Longer term future operations will shift to a new location on the other side of the road and eventually move towards the SE closer to the homes as shown in Figure 2.4. The pit floor elevation is expected to be 990 feet. 2.3. Elk River Wash Plant Facility 2.3.1. 2006 Operations General location of the Elk River Wash Plant Facility is shown in Figure 2.5. In 2006 the primary noise sources were the shale jig and wash plant. Secondary sources include loaders and trucks. The closest residential receptors are located just west of the recreational trail which runs generally north-south at the west boundary of the wash plant property. These homes range in elevation from 960 to 978 feet. These elevations of the three closest homes range from 1070 to 1098 feet. Elevation of the shale jig is 998 feet while the wash plant is at 999 feet. In 2006, stockpiles up to 40 feet in height were distributed along the west side of the wash plant area, providing some noise shielding of wash plant operations. Noise monitoring sites are also shown on Figure 2.5. 2.3.2. 2007 and Future Operations In 2007, it is assumed that shale jig and wash plant will remain in the 2006 location but the cone crusher from the Livonia Mining Operation will be relocated to this area as shown in Figure 2.6. Upon removal of the stockpiles, an earth berm will be constructed along the west boundary of the wash plant area as shown in Figure 2.6 to provide shielding of the homes to the west. Height of the berm will be discussed below in Section 5.3. David Braslau Associates, Inc. Page 6