2014-10-21_PERMIT FILE - C2010088A

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2.05.6 Mitigation of the Impacts of Mining Operations extent based on habitat and location selected for use. River otter use in Reed Wash would not likely be affected as long as the habitat for food and cover remains in its current condition or is improved. The River Otter's habitat is within the deeply incised Reed Wash drainage that will not be affected. The rail bridge over Reed Wash will be constructed with six spans of various widths supported on piling. The piling will not significantly affect waters or wetlands or riparian areas. No other activity will be near the River Otter's habitat. There are non - jurisdictional wetlands and wetland -type vegetation located on the west side of the permit boundary. The Applicant designed the rail spur to minimize this vegetation disturbance. The rail spur was also designed to originate west of Reed Wash which eliminates the need for a second bridge crossing had the rail spur originated to the east of Reed Wash. Four culverts C -W2 through C -W5 are placed under the rail in the wetlands so the wetland hydrology is not disrupted. In addition, a berm will be constructed at the toe of the disturbance created by the rail spur to capture the disturbed area runoff. This runoff, will then be passed through a silt fence prior to flowing into the wetland areas to further limit the disruptions to wetland hydrology. Although wetland type vegetation does not appear to be present at the location of Culvert C -W2 west of Reed Wash, it will be managed the same way as culverts CW -3 through C -W4 due to the close proximity to Reed Wash. (2)(b) Map -21 shows the location of the redesigned rail bridge used to protect the critical habitat found in Reed Wash and the 100 -year floodplain. Map -13 shows the location of the three sediment ponds that will be lined. Permit Application 2.05 -49 01/12