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_21_ The application indicates that Apache Canyon, Santistevan Canyon, and Ciruela Canyon contain unconsolidated streamlaid deposits. These deposits would be undermined by the proposed operations, and the applicant has proposed to construct a coal refuse pile in the mouth of Ciruela Canyon. However, no information has been provided concerning the absence or presence and quality and quantity of alluvial ground water in these deposits. The following stipulation is necessary in order to comply with Rule 2.04.7(1). Stipulation No. 8 PRIOR TO SECONDARY OR RETREAT MINING AT THE MAXWELL MINE, THE PERMITTEE SHALL PROVIDE A HYDROLOGIC SURVEY IDENTIFYING ALL ALLUVIAL AQUIFERS IN, OR ADJACENT TO THE PERMIT AREA (EXCEPT FOR THE PURGATOIRE RIVER ALLUVIAL AQUIFER WHICH HAS ALREADY BEEN IDENTIFIED). THIS SURVEY SHALL CONTAIN INFORMATION CONCERNING DEPTH BELOW THE SURFACE, HORIZONTAL EXTENT, WATER USE, AND QUANTITY AND QUALITY OF GROUND WATER AS REQUIRED UNDER RULE 2.04.7(1). THE PERMITTEE SHALL ALSO PROVIDE A DISCUSSION OF THE PROBABLE HYDROLOGIC CONSEQUENCES OF MINING UPON THOSE ALLUVIAL AQUIFERS IDENTIFIED. With the acceptance of the above stipulations, the proposed operation is in compliance with requirements of this section. VII. Probable Hydrologic Consequences of Mining and Cumulative Hydrologic Impact Study - Rules 2.05.6(3) and 2.07.6(2)(c) The following cumulative hydrologic impact study (CHIS) has been prepared for the portion of the Purgatoire River Basin above Madrid, Colorado, pursuant to Rule 2.07.6(2)(c). This CHIS assesses the projected cumulative hydrologic impacts of all anticipated mining operations in the general area of the Maxwell Mine. Mining operations included in the analysis include the CF&I Allen (CMLRD Permit Number C-12-81) and Maxwell (CMLRD Permit Number C-13-81) mines. These mines are existing underground mines located in the Stonewall and Picketwire valleys within the Purgatoire River drainage. This assessment is based primarily upon data and analysis contained in the Allen and Maxwell mines permit applications, and upon the observations of Division personnel during inspections of the mine site. Some additional analysis was performed by the Division to complete the finding. This discussion is divided into four major subsections: Description of the Existing Environment, the Probable F~ydrologic Consequences of Mining, the Cumulative Hydrologic Impacts of Mining, and Continued Monitoring Requirements. Surface and ground water are discussed separately in each subsection.