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• 11` subsidence adversely affects surface resources in any way (including, but not limited to <br />a documented water loss), the coal lessee, at their expense, will be responsible to: restore <br />stream channels, stock ponds, protect stream flow with earthwork or temporary culverts, <br />restore affected roads, or provide other measures to repair damage or replace any surface <br />water and /or developed groundwater source, water conveyance facilities, with water from <br />an alternate source in sufficient quantity and quality to maintain existing riparian habitat, <br />and wildlife use, as authorized by 36 CFR 251. An appropriate augmentation plan for <br />replacement water will be decreed prior to commencing mining activities and will <br />consider drought conditions and the limitations of local water supplies. <br />• The lessee /operator would design the layout of longwall panels to minimize impacts to <br />West Fork Terror Creek. Primarily, this will consist of orienting panels approximately <br />parallel with the creek as currently proposed and represented in the Subsidence Report <br />(W WE, 2013a), thus reducing the number and severity of transitions fi-om subsidence to <br />non- subsidence zones. <br />• The lessee /operator would design and implement a stream flow measurement program. <br />The program will consist ofestablishing monitoring stations upstream and downstream of <br />the expected subsidence area on West Fork Terror Creek. Flow monitoring stations will <br />be designed and calibrated by water resource engineers and will focus on continuous <br />measurements of- low and base flow conditions (i.e., summer through late fall). <br />Lessee /operator staff will have trained staff available to conduct site visits to ensure <br />continuous flow measurements are recorded on a minimum monthly schedule, weather <br />permitting. Flow data will be compiled into an annual report that will include <br />comparisons to previously collected data. This report will be submitted to the BLM, <br />USFS and USFWS. <br />• The lessee /operator will conduct fish, sediment and macroinvertebrate sampling (as <br />performed by W WE and MEC in 2012) every two years during and twice following the <br />mining activities (at 5 and 10 years periods) prior to bond release. A report should be <br />distributed to the BLM, USFS and USFWS documenting if statistically significant <br />declines are observed related to mining activities. If a statistically significant decline in <br />the fishery within the subsidence area results from the Proposed Action (i.e., a decline at <br />sites within the subsidence area does not correlate with a decline in the fishery outside the <br />subsidence area), the lessee/operator will investigate the cause of the decline. If the <br />decline is resulting from habitat changes as a result of longwall mining induced <br />subsidence, the operator/lessee will engage a fish habitat ecologist to design habitat <br />enhancement structures to mitigate the observed impacts. If a decline in fish numbers <br />persists following mitigation of an observed physical or chemical impact, the <br />lessee/operator will work with CPW to capture and grow out fish populations from <br />appropriate breeding stock. The lessee /operator will establish a minimum of tVW <br />subsidence monitoring gridlines across the stream channel in areas of anticipated vertie <br />displacement that will be surveyed prior to and following longwall mining beneath tlk <br />area. These survey data will be used to confirm /refine the subsidence predictions for the <br />area. The results of these surveys, as available, will be included in the previousi? <br />mentioned annual Monitoring Report and distributed accordingly. <br />w <br />4 <br />�n <br />J co <br />'i <br />o� <br />