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Mr. Chris Rowe December 12, 2006 Page Three of Eight Other than the Camenish residence, the residence nearest the proposed borrow pit is located approximately 1,750 feet to the south, southeast. Records of the SEO indicate that, other than the Idaho Creek Resources sand and gravel pit, there are two registered wells in the general vicinity of the proposed borrow site. Both wells are located east of the Godding Ditch approximately 1,800 feet south, southeast from the southeast corner of the proposed permit boundary. Indeed, one well is located south of Weld County Road 20 '/: about 1000 feet east, southeast of the Idaho Creek Resources pit. Finally, rule 6.4.7(2)(b) cited in the Division's original adequacy review letter dated November 30, 2006 and in the December 8, 2006 request for additional hydrologic information pertains to the Divisions specific exhibit requirements for 112 Reclamation Permits. The Applicant is not required to provide such information under the specific exhibit requirements for 111 Special Operations Permits. The Applicant's original response to the Divisions November 30, 2006 Adequacy Review letter is based on the Divisions specific exhibit requirements of Rule 6.3.3(1). 6.3.4 EXHI$IT D -Reclamation Plan Response The construction method used to seal the pit from the surrounding alluvium involves the placement of a compacted backfill core azound the perimeter of the excavated pit floor. This method is similaz in many ways to the conventional way sand and gravel pits are reclaimed in that once mining is completed the perimeter of the pit is backfilled using the overburden and topsoil that was set aside during the process of preparing the pit for mining. While there may be no discernable difference in the appearance of a conventionally reclaimed pit and a sealed pit there are significant differences in the methods of construction. In order to effectively seal a pit with compacted backfill the contact between the sand and gravel alluvium and the pit floor, which in most instances is composed of shale or clay stone, must by sealed. To accomplish this, a keyway, which is typically a three foot deep by twelve-foot wide slot, is excavated in the pit floor approximately five to ten feet from the sand and gravel pit high-wall. Once the keyway is excavated azound the perimeter of the pit floor, the process of backfilling begins using overburden that was stripped prior to mining. The backfill is placed in compacted one to two foot lifts azound the perimeter of the pit from the floor to the top of the pit. This compacted overburden and shale core effectively seals the entire pit perimeter from the pit floor to the top of the pit high-wall. After the compacted core is in place, the remaining pit slope is