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this location. Monthly evaporation percentages are established by guidelines set by the State <br />Engineer's Office. To determine precipitation, data from the National Weather Service for the <br />Lamar, CO (054770) (1893-2007) was used. The long-term average precipitation at the West <br />Farm Pit is estimated at 15.4 inches. Effective precipitation is calculated as 70% of the total <br />precipitation. The net evaporation is the difference between gross annual evaporation and <br />effective precipitation. The resulting net evaporation is 4.1 feet. <br />The maximum evaporative loss from the 0.61 acres is 2.50 ac-ft. <br />Operational Loss <br />The average annual production from the West Farm Pit site is estimated at 750,000 tons. Using <br />4% moisture content, the total associated consumptive use for water retained in the material <br />mined is 22.1 ac-ft. <br />Dust control use is 10,000 gal/day, 5 days/week, 4 weeks/month for 10 months of the year. This <br />equates to 6.2 ac-ft. <br />Maximum annual operational loss is estimated to be 28.3 ac-ft. <br />Consumptive Use <br />The maximum annual consumptive use at this site during the mining operation is estimated to <br />be 30.8 ac-ft <br />Replacement Water <br />The replacement of consumptive uses at the site is will be accounted for in a substitute water <br />supply plan (SWSP) approved by the State Engineer. The SWSP will be obtained prior to any <br />mining activities occurring that expose groundwater. <br />The following water sources will provide the necessary replacement water for the site: <br />• Lower Arkansas Water Management Associations shares which GP Ranches, <br />LLC. owns and which have previously been used for augmentation for the <br />irrigation wells on the property. (See attached Bargain and Sale deed) <br />Surrounding Water Rights <br />Figure Exhibit G-1 shows the permitted wells within 600 feet of the mining limits. The well <br />information and locations were obtained from the Division of Water Resources online mapping <br />well permit locator. This well and water rights information was cross checked with the State's <br />CDSS. Between the sources, all permitted and decreed wells are included. Table Exhibit G-1 <br />below is a corresponding list of wells as numbered in Figure Exhibit G-1. <br />m GP Ranches, LLC. <br />01 JBT Consulting, Inc. West Farm Pit <br />DRMS 112 Permit Application <br />24