2014-09-12_REVISION - C1996083 - Laserfiche WebLink

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• The lessee /operator will establish a minimum of two subsidence monitoring gridlines across the stream channel in areas of anticipated vertical displacement that will be surveyed prior to and following longwall mining beneath the area. These survey data will be used to confirm/refine the subsidence predictions for the area. The results of these surveys, as available, will be included in the previously mentioned annual monitoring report and distributed accordingly. • The lessee /operator will implement adaptive management to correct observed impacts to the stream. Potential impacts and their subsequent mitigation include: o Fishery Impacts: If a statistically significant decline in the fishery within the subsidence area results from the Proposed Action (i.e., a decline at sites within the subsidence area does not correlate with a decline in the fishery outside the subsidence area), the lessee /operator will investigate the cause of the decline. if the decline is resulting from habitat changes as a result of longwall ruining induced subsidence, the operator/lessee will engage a fish habitat ecologist to design habitat enhancement structures to mitigate the observed impacts. If a decline in fish numbers persists following mitigation of an observed physical or chemical impact, the lessee /operator will work with Colorado Parks and Wildlife (CPW) to capture and grow out fish populations from appropriate breeding stock. Bald and Golden. Eagle Nest Sites • No new permanent surface facilities or disturbance except subsidence will be located within a one - quarter mile radius buffer zone around each bald or golden eagle nest site. • No surface activities will be allowed within a one -half mile radius buffer zone around each active eagle nest site from November 15 to July 36 for bald eagles and February I to July 15 for golden eagles. Any proposed surface facilities, disturbance, or activities (as noted above) in or adjacent to these buffer zones will require approval from the surface management agency on a site- specific basis, after consultation with the USFWS. Bald and Golden Eagle Roost Sites • No surface activity, except subsidence, will occur within a one - quarter mile radius of winter roosts between November 15 and March 15. Development may be permitted at other periods. If periodic visits are required within the buffer zone after development, activity will be restricted to the hours between 10:00 a.m. and 2:00 p.m. from November 15 through March 15. Peregrine Falcon Nest No new permanent surface facilities or disturbance will be located within a one - quarter mile radius buffer zone around each peregrine falcon nest site. • No aboveground activities will be allowed within a one -half mile radius buffer zone around each active peregrine falcon nest site from February 1 to July 15. Any proposed surface facilities, disturbance, or activities in, or adjacent to, these buffer zones will require approval from the USFS or BLM on a site - specific basis, after consultation with the USFWS. 6