2016-02-11_GENERAL DOCUMENTS - C1981014

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COUNTY ROAD 92 The condition of County Road 92 (CR92) remains as a concern. We have written and discussed this in the field many times about these concerns along with periodic photographs showing its deterioration. This paper is an attempt to summarize the events that have resulted in the problems existing today. When Dorchester started the original mine in about 1981, they reconstructed CR92 utilizing wash plant reject or refuse as fill material. We have testified that refuse was dumped in the area where the two giant gullies are inside (south of) the locked green gates on CR92. DRMS has photographs of Dorchester’s dumping of refuse outside the permit area. The DRMS inspection report dated Jan. 12, 2016, quotes Tony Adamic, Fremont County Road Boss, that it is very likely that Dorchester placed plant reject material along the road. Four events occurred within a relative short period in 2011. A. We first noticed that the northwest CR92 ditch was starting to erode. B. Large amounts of sediment were deposited at the locked green gates. C. In September, 2011, the south inlet culvert to Pond 5 was found to be filled with sediment. D. EFCI constructed six water bars across CR92 north of Pond 5. A. Previou to about 2011 the northwest roadside ditch was a nominal 4 feet wide, 2 feet deep V ditch. It had been stable for about thirty years. Something changed in a short period of time in 2011. B. The sediment deposition at the green gates, erosion of CR92 south of the green gates, and transport of sediment onto the adjacent property was first observed in 2011. C. The south inlet culvert to Pond 5 was filled with sediment. It is obvious that sediment filling of this culvert greatly reduced the function of this culvert, and from the size and the maturity of the vegetation in the deposited sediment as seen in Figure 1 it was a long duration problem. Fig. 1. South inlet culvert into Pond 5, Sept. 6, 2011. See also DRMS inspection report of Sept. 7, 2011.