Laserfiche WebLink
Colowyo Coal Company <br />2018 Annual Reclamation and Hydrology Report <br />• Gossard Well is located within the rail loop facility and represents the condition <br />of groundwater associated with the Gossard Loadout Facility. Monitoring has <br />occurred from 1983 to 2018. <br />• MT -95-02 Well is located just south of the rail loop facility and represents the <br />down dip condition below mining activities. Monitoring started in the first <br />quarter of 2008 and has continued through 2018. <br />• MLC -04-01 is located in Little Collom Gulch. This site represents the down <br />gradient condition below the Collom temporary spoil pile. Monitoring started in <br />the first quarter of 2011 and has continued through 2018. <br />• MC -04-01 is located in Collom Gulch, and this site represents the condition of <br />the adjacent to the Collom Pit. Monitoring started in the first quarter of 2011 <br />and has continued through 2018. <br />• MC -04-02 is located in Collom Gulch, and this site represents the down <br />gradient condition below the Collom mining area. Monitoring started in the <br />first quarter of 2011 and has continued through 2018. <br />• MJ -95-01 is located in the West Fork Jubb Creek, and this site represents the <br />down gradient condition of the Collom Pit. Monitoring started in the first <br />quarter of 2011 and has continued through 2018. <br />• MJ -95-03 is located in the Jubb Creek just downstream of the confluence of the <br />West and East Forks of Jubb Creek, and this site represents the condition <br />downgradient of the Collom Pit. Monitoring started in the first quarter of 2011 <br />and has continued through 2018. <br />• Trout Creek Well is located on the northeastern edge of the Collom Pit, this site <br />represents the regional aquifer condition of the Trout Creek Sandstone. <br />Monitoring started in the first quarter of 2017 and has continued through 2018. <br />GENERAL TRENDS — Surface Water <br />Colowyo currently samples each surface water site for a variety of quality parameters. Of <br />all the parameters that are analyzed for, several key indicator parameters are identified. <br />These are lab pH, lab conductivity, TDS, sulfate, calcium, iron, magnesium, sodium and <br />flow rate. Statistical analysis is completed and illustrates historical trends for each <br />parameter. See graphs for the trend lines in Exhibit IA. <br />Surface Water Data — The trend lines of the graphs in Exhibit IA were evaluated. No <br />significant trends were identified, and as such, the information is not included in <br />summary format. This analysis supports the assumed probable hydrologic consequences <br />of minimal impacts to surface water due to mining activity. <br />Page 5 <br />