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Water Quality Monitoring. Drainage structures are routinely inspected and cleaned out <br /> as needed. Hydrologic monitoring (surface and ground water) has been carried out in <br /> order to meet requirements of the NPDES permit and to meet requirements in the <br /> mining permit issued by Colorado Division of Reclamation, Mining and Safety. <br /> Depending on mining activity and monitoring data, the mine may follow either an active <br /> mining monitoring plan or a temporary cessation monitoring plan (Exhibit 29 of the <br /> mining permit). The temporary cessation plan is a reduced version of the active mining <br /> plan. The active mining monitoring plan is designed to identify changes in the hydrologic <br /> system. The temporary cessation plan is designed to identify any change in the <br /> hydrologic system that could result in a change in impact to the hydrologic balance. <br /> Weed Control. Reclaimed areas and mine related disturbances, such as roadsides <br /> and facilities, are monitored for noxious weed infestations. Monitoring is <br /> conducted through the formal revegetation monitoring program or as qualitative <br /> observations by MCM reclamation personnel under the Noxious Weed Management <br /> Program. If noxious weed infestations occur at levels that may interfere with <br /> successful reclamation or are detrimental to reclaimed land quality, weed control is <br /> implemented. Application of herbicides typically occurs from June through <br /> October (as needed), and has been carried out through outside services, the Ag land <br /> leasee, or MCM Reclamation Department personnel. <br /> IV. REFERENCES <br /> Colorado Division of Minerals and Geology (CDMG). 1980. Regulations of the Colorado <br /> Mined Land Reclamation Board for Coal Mining. Revised September 14, 2005. <br /> Colorado Division of Minerals and Geology (CDMG). 1995. Guideline Regarding Selected Coal <br /> Mine Bond Release Issues. April 18, 1995. <br /> 6 <br />