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-12- Little evidence of subirrigation in Mann Draw was found in the study. Areas where the vegetation sugyests suoirrigation are discontinuous and limited to narrow bands along the channel ways. Based on evidence supplied by the applicant, the Division finds that Mann Uraw is not an alluvial valley floor. The only area identified as an alluvial valley floor is the Canadian River, which is both flood irrigated and subirrigated. This river is located 1.7 miles downstream from the mine site. Alluvial Valley Floors - Canadian River - Findings 1. The proposed surface coal mining operations would not interrupt, discontinue, or preclude farming on an alluvial valley floor. The permit area is located 1.6 miles from the alluvial valley floor and would not physically affect farming activities. 2. The proposed surface coal mining operations would not materially damage the quantity and quality of water in surface and underyround water systems that supply those alluvial valley floors or portions of alluvial valley floors. The Canadian River receives most of its flow from snowrnelt in the Idedicine Bow Range east cf the mine site. Mann Draw, which flows a few weeks per year, contributes an insignificant amount of surface water and groundwater to the Canadian River alluvial valley floor. 3. Surface coal mining and reclamation operations will be conducted to preserve, throughout the mining and reclamation process, the essential hydrologic functions of the alluvial valley floor. The alluvial valley floor will not be physically disturbed by the operation. The applicant has not identified any significant hydrologic effect that would disturb the essential hydrologic functions of the Canadian River alluvial valley floor. The operation is in compliance with the requirements of this section. VIII. Water Rights - Rules 2.04.7(3), 2.05.6(3)(a)(ii), 2.07.6(2)(c) and The mining operation will require 10,000 gallons per day (7 gpm) for dust suppression, washdown of equipment and domestic uses. The applicant has obtained an adjudicated water right for yround water under Colorado Water Case Number 79CW226. There are no water rights listed in the State Engineer's Office Stream Alpha listing for surface water in hlann Uraw. A listing of all wells within the general area of the mine is contained in Table 5b of the permit application. Uf the listed wells, only 3 are located 'withins miles of the permit boundary.