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<br />Tiller Corporation Elk River and Livonia Quarries <br /> <br />Noise Assessment <br /> <br />Table of Contents <br /> <br /> <br />1. 0 INTRODUCTION ............................ .................................................................... ............. 1 <br /> <br />1.1. Objectives of this Report ................. ........ ............. ................ ......... ...... .......... ........... ....... 1 <br />1.2. Minnesota Noise Standards ............................................................................................. 1 <br />1.3. Organization of this Report ............................................................................................. 1 <br /> <br />2.0 ASSUMPTIONS ON MINING ACTIVITy.................................................................... 2 <br /> <br />2.1. Livonia Mining Operation .................... ..................................... ............. ........... .............. 2 <br /> <br />2.1.1. 2006 Operations....................................................................................................... 2 <br />2.1.2. 2007 and Future Operations .................................................................................... 2 <br />2.2. Elk River Mining Operation............................................................................................2 <br />2.2.1. 2006 Operations.......................................................................................................2 <br />2.2.2. 2007 and Future Operations .................................................................................... 6 <br />2.3. Elk River Wash Plant Facility .........................................................................................6 <br /> <br />2.3.1. 2006 Operations....................................................................................................... 6 <br /> <br />2.3.2. 2007 and Future Operations .................................................................................... 6 <br />3.0 NOISE MONITORING PROGRAM ............................................................................ 10 <br /> <br />3.1. Noise monitoring locations and results ......................................................................... 10 <br />3.2. Comparison of Monitored and Modeled Levels............................................................ 11 <br /> <br />4.0 PREDICTION 2007 AND FUTURE NOISE LEVELS................................................ 13 <br /> <br />4.1. Modeling methodology and assumptions...................................................................... 13 <br />4.2. Livonia Mining Operation............................................................................................. 13 <br />4.3. Elk River Mining Operation.......................................................................................... 15 <br />4.4. Elk River Wash Plant Facility ....................................................................................... 17 <br /> <br />5.0 SUMMARY OF FINDINGS AND RECOMMENDATIONS...................................... 19 <br /> <br />5.1. Sound Levels Associated with 2006 Operations ........................................................... 19 <br />5.1.1. Livonia Mining Operation..................................................................................... 19 <br />5.1.2. Elk River Mining Operation.................................................................................. 19 <br />5.1.3. Elk River Wash Plant Facility ............................................................................... 19 <br />5.2. Estimated Sound Levels Associated with 2007 Operations .......................................... 19 <br />5.2.1. Livonia Mining Operation..................................................................................... 19 <br />5.2.2. Elk River Mining Operation.................................................................................. 19 <br />5.2.3. Elk River Wash Plant Facility ...............................................................................20 <br />5.3. Estimated Sound Levels Associated with Future Operations........................................ 20 <br />5.3.1. Livonia Mining Operation..................................................................................... 20 <br />5.3 .2. Elk River Mining Operation.................................................................................. 20 <br />5.3.3. Elk River Wash Plant Facility ............................................................................... 20 <br /> <br />5.4. Concluding Comment.................................................................................................... 20 <br /> <br />David Braslau Associates, Inc. <br />