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Spring 2016 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mininq Areas <br />3.0 SUBSIDENCE MONITORING <br />MCC has been collecting data from numerous monitoring locations in and around Minnesota <br />Reservoir, Monument Dam and the general Dry Fork area for many years. Ongoing monitoring <br />by MCC personnel includes the Monument Dam and Minnesota Reservoir area, as well as U.S. <br />Forest Service (USFS) roads and stock ponds. Survey data and inspection forms for these areas <br />are provided in Appendix A and B, respectively. Data and discussions associated with ongoing <br />MCC monitoring are provided by MCC and included in this WWE report for convenience. <br />3.1 Monument Dam/Minnesota Reservoir Monitoring <br />As described in previous subsidence reports, MCC has conducted monitoring of the Monument <br />Dam and strategic locations around Minnesota Reservoir since 2006. Currently, MCC has <br />monitoring and reporting responsibilities for the land survey stations. Data collected from various <br />monitoring locations on the Monument Dam (including Dam Inspection Forms) are provided in <br />Appendix A. <br />Quarterly land surveys of the monuments (monthly when mining is within one mile of the dam) <br />were completed. A summary of both average height and longitudinal displacement data obtained <br />from fall 2015 to spring 2016 is provided in Table 1 of Appendix A. <br />3.2 USFS Roads and Stock Pond Monitoring <br />Observations by MCC personnel of the USFS roads and stock ponds in the vicinity of active <br />mining activities have occurred for many years. Inspection forms from observations conducted <br />during the spring of 2016 are included with this report in Appendix B. <br />831-032.798 Wright Water Engineers, Inc. Page 7 <br />August 2016 <br />