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Substitute Water Supply Plan and Gravel Well Permit Application <br />Lafarge currently has as approved Substitute Water Supply Plan (SWSP) for the adjacent 35?' <br />Avenue Pit. Lafarge will submit a renewal for the 35th Avenue Pit SWSP to the State Engineer's <br />Office (SEO) by September 15, 2009 and include the consumptive use from the Lafarge Brown <br />Mine in the renewal. The depletions and augmentation schedule will be outlined in the SWSP. <br />Lafarge owns water rights in this reach of the Cache La Poudre River which could augment the <br />depletions at the Lafarge Brown Mine throughout the mining life of the property. <br />Lafarge has a perpetual lease from the City of Greeley in exchange for 125 acre-feet of year-round <br />augmentation water, which will be the primary augmentation source for this site. Lafarge owns 8.5 <br />Box Elder Ditch shares which can be used for augmentation of depletions at the Lafarge Brown <br />Mine. The Box Elder Ditch shares have historic consumptive use credits of 426.3 acre-feet per <br />year. The Box Elder Ditch shares are currently used at a recharge site and are able to provide <br />augmentation during the winter months at the Lafarge Brown Mine. <br />These water rights are currently used to augment other active mining sites, but could also be used in <br />the future to augment the Lafarge Brown Mine. Lafarge's water right portfolio in this reach of the <br />Poudre River can augment the Lafarge Brown Mine during mining and after reclamation. <br />The policy of the SEO is to provide a copy of the SWSP approval to the DRMS for the site when <br />the review process is complete. Lafarge will also complete the required 600 foot well inspection <br />with the water commissioner and submit the required gravel pit well permit application to the SEO. <br />Lafarge will not expose groundwater at the Lafarge Brown Mine until both the SWSP and well <br />permit are approved by the SEO. <br />Long-term Augmentation <br />A water court application for a long-term plan for augmentation will be filed three years prior to the <br />completion of mining. The decreed plan for augmentation will replace all stream depletions from <br />evaporation of the unlined lake after reclamation. <br />Attachments <br />G-1: Groundwater Monitoring and Mitigation Plan <br />G-2: Stormwater Management Plan <br />Greeley 35`h Avenue Mine (M-1977-036) <br />DRMS 112 Reclamation Permit Amendment Application <br />P.\23511V33-23511-08005\Deliverables\DRMSWpplication Package\EshibitGlEshibitG 06-05-09.doc Page G3 of G3