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sprinkler or ditch irrigated. The only adjacent land where alfalfa crops are located is south <br />of the mine property. Typical depths to water bgs in wells located adjacent to this area <br />(MW-09 and MW-11) range from 7 to 9 feet. Due to the combination of depth to water and <br />reliance on ditch irrigation, there appears to be little if any reliance on sub-irrigation. <br />Lafarge believes that the proposed monitoring and mitigation plans will allow for <br />identification and avoidance of impacts. <br />MONITORING AND MANAGEMENT <br />Groundwater Monitoring <br />Fourteen monitoring wells were installed around the perimeter of the site as shown in <br />Figure 2. Groundwater level monitoring began in April 2007. Monitoring was conducted <br />bi-monthly for the first year. Since then, monitoring has been and will continue to be <br />conducted on a quarterly basis to establish a site-wide baseline prior to mining. Table 3 and <br />Figure 3 provide the existing groundwater level measurement data for the site monitoring <br />wells, which likely captures the majority of the annual range in water level fluctuations. <br />Once mining begins, monitoring will be conducted on a monthly basis until a quasi-steady <br />state condition is reached (during initial dewatering), and on a quarterly basis thereafter <br />until one year after reclamation is complete. In addition, wells near river corridor areas <br />adjacent to active mining phases will be monitored monthly during the growing season. <br />Owners of wells within 0.5 miles have been contacted to obtain and document relevant well <br />information and provide an opportunity for including their well(s) in the monitoring <br />program. The following summarizes the results of the survey: <br />Permit No. Status <br />114611 Owner uses only for minimal livestock watering. <br />Active mining by others directly adjacent to property without <br />adverse effects, so owner not concerned or interested in <br />having well monitored. <br />Permit No. Status <br />4189 Well used for periodic irrigation of 5 acres and trees. Owner <br />requests monitoring, to be initiated when well is made <br />accessible (pending). <br />4446 Well used for crop irrigation and located approx. 3/8 mile <br />from proposed mine excavations. Owner requests inclusion <br />in routine monitoring, which was initiated in October 2007 <br />(Table 3). <br />10847 Same as above <br />Lafarge West, Inc. - Parsons Mine 5 <br />Groundwater Monitoring and Mitigation Plan