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-14- <br />On the basis of the above information the Division has determined that Newlin <br />Creek does not contain sufficient water availability to support agricultural <br />activities. Therefore Newlin Creek, within the mine study area, is not found <br />to qualify as an alluvial valley floor. <br />Based on the information provided by the applicant and with the acceptance of <br />the above stipulation, the Division makes the following findings: <br />A. Pursuant to Rule 2.06.8(5)(a)(i), the Division finds that the proposed <br />mining operations will not interrupt, discontinue, or preclude farming <br />on alluvial valley floors (Rule 2.06.8(5)). <br />B. Pursuant to Rule 2.06.8(5)(a)(ii), the Division finds that the proposed <br />surface coal mining operation will not materially damage the quantity <br />and quality of water in surface and ground water systems that supply <br />those alluvial valley floors or portions of alluvial valley floors. <br />C. Pursuant to Rule 4.24.2(1), the Division finds that the proposed surface <br />coal mining operations have been designed to preserve the essential <br />hydrologic functions of alluvial valley floors. <br />VIII. Probable Hydrologic Consequences of Mining and Cumulative Hydrologic <br />T 1 f1.. J.. 11 ..1 ~~ O AL L O .-J~~ .. <br />Because of the close proximity of other active mines and extensive previous <br />mining within the general area, as shown on the attached Figures, both the <br />probable hydrologic consequences of the Dorchester No. 1 Mine and the <br />cumulative hydrologic impact study are discussed concurrently in this <br />document. The document first discusses the Existing Hydrologic Environment of <br />the general area, the Canon City Coal Field. Next is a discussion of the <br />Probable Hydrologic Consequences of the Dorchester No.l Mine. Then the <br />Cumulative Hydrologic Impact Study (CHIS) assesses the probable cumulative <br />hydrologic impacts of all anticipated coal mining operations upon the general <br />area of the Canon City Coal Field. Included in this assessment are all those <br />proposed coal mines for which complete permit applications have been submitted <br />to the Division. This study has been prepared using information and analyses <br />contained in the Dorchester No. 1 permit application Section 2.05.6(3) of the <br />Second Adequacy Response, information and analyses contained in other permit <br />applications for mines located in the general area and other available <br />information, including site visitation by Division staff members. <br />Existing Hydrologic Environment <br />As was discussed in the introduction to this document, the general area of the <br />Canon City Coal Field has been extensively mined. Because most of the mining <br />took place early in this century, little, if any, baseline water quality and <br />quantity information exists to characterize the area before mining. However, <br />the mines seeking permits through Colorado's permanent program have collected <br />information describing the hydrologic regime as it currently exists. <br />~~~~ ~'~ <br />~/Z ~%y <br />