2016-02-25_PERMIT FILE - C1982056A (5)

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These stations are generally monitored monthly or quarterly for flow, and semi-annually for field and full - suite parameters, although the monitoring schedule for specific stations may vary seasonally. Please refer to Exhibit 14, Hydrologic Monitoring Plan, for monitoring schedule details for specific stations. Pondin — TC will conduct visual spring and fall field reconnaissance surveys (annual) for those areas where segments of Fish and/or Foidel creeks overlie portions of the Wolf Creek longwall panels which are actively being mined, to assess and document any significant ponding which may occur. This visual monitoring will occur during and for one year following completion of active mining for any affected stream segment(s). It should be noted that ponding plays a beneficial part in mitigating potential subsidence effects on the stream, providing areas with decreased flow velocities to allow sediment to drop-out, and moderating temperature fluctuations in the streams. The reconnaissance survey will include visual assessment of any potential adverse effects associated with excessive ponding. Vegetation Monitoring — In conjunction with and on the same schedule as the field reconnaissance surveys previously described, TC will conduct visual surveys of flooded areas of the Fish Creek AVF to identify and assess any significant changes in vegetation community type. These observations will be made at the end of the growing season (fall). Visual observations will be used to identify approximate vegetation community boundaries, which will be mapped using field GPS units. Mapping information and field notes will be used to document any significant changes in vegetation community type and distribution. It is anticipated that subsidence may result in some areas of transitional vegetation communities, which will be the primary focus of these surveys. The results of the AVF monitoring will be summarized in TC Annual Hydrology Report (AHR).