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<br />Tiller Corporation Elk River and Livonia Quarries <br /> <br />Noise Assessment <br /> <br />2.0 ASSUMPTIONS ON MINING ACTIVITY <br /> <br />To develop quantitative estimates of potential impacts, assumptions as to mining activity within <br />the three quarries must be developed. This section outlines the assumptions that have been used <br />to evaluate noise levels. <br /> <br />2.1. Livonia Mining Operation <br /> <br />2.1.1. 2006 Operations <br /> <br />General location of the Livonia Mining Operation adjacent to TH 169 is shown in Figure 2.1. <br />The only residential land use potentially impacted by mining in this area is the Spencer residence <br />identified in the figure at an elevation of approximately 1035 feet. Also shown in the figure are <br />two noise monitoring sites used to help establish existing noise levels. The primary noise sources <br />in this operation (primary crusher and cone/screening) are also shown on the figure. Secondary <br />noise sources are loaders and trucks. The pit floor elevation is approximately 965 feet. Noise <br />monitoring sites are also shown on Figure 2.1. <br /> <br />2.1.2. 2007 and Future Operations <br /> <br />In 2007, the primary crusher will move slightly to a new location as shown in Figure 2.2. In the <br />future the cone crusher and screen as well the primary crusher will move towards the north along <br />with the mine face ending at a final location also shown in Figure 2.2. The Spencer residence is <br />assumed to be the closest residential land use adjacent to this operation in the future. The pit <br />floor elevation will remain at approximately 965 feet. <br /> <br />2.2. Elk River Mining Operation <br /> <br />2.2.1. 2006 Operations <br /> <br />General location of the Elk River Mining Operation is shown in Figure 2.3. The primary noise <br />source at this location is the crushing complex which includes crushing and screening operations. <br />Secondary noise sources are loaders and trucks. The closest residential receptors are located to <br />the south of the mining crusher complex as seen in the figure. The elevations of the three closest <br />homes range from 1070 to 1098 feet. The pit floor elevation is 990 feet. Noise monitoring sites <br />are also shown on Figure 2.3. <br /> <br />David Braslau Associates, Inc. <br /> <br />Page 2 <br />