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i be minor. The Round Bottom alluvial valley floor primarily supports flood irrigated hayt3elds and pasturelands. The E<igle No. 9 Mine workings are not in close proximity to nor do they impact areas tributary to the Round Bottom AVF. Therefore, no impacts to the essential hydrologic functions of the Round Bottom alluvial valley floor occurred. The Eagle No. ~ Mine does not extend under [he Round Bottom alluvial valley floor. The 2 West workings of this mine did, however, undermine approximately 90 acres containing surface and ground waters tributary to the Round Bottom alluvial valley floor. The 2 West workings undermined small ephemeral streams directly tributary to the Yatnpa River/Round Bottom alluvial valley floor. The 2 West workings also undermined the Twentymile and Middle Sandstone aquifers along the upper edge of the Round Bottom Synclinal Basin (a regional ground water basin) and along the axis of the Williams Fork Anticline. The 2W workings have been abandoned for more than ten years. Only minor areas had pillars pulled. Other mining was development by room and pillaring only. The impacts to the quan tity of water supplied to the Round Bottom A VF were previously (in the 1984 Findings Document) predicted to be negligible upon evaluating the proposed mine plan. Due to the reduced areas of mining, impacts aze considered to be negligible for both quality and quantity of water supplied to the Big Bottom AVF. The Eagle No. 5 Mine will not disrupt the essential hydrologic functions (e.g., the capacit}• for flood irrigation) of the Round Bottom alluvial valley floor. The mine will neither undermine the land surface of the alluvial valley floor nor undermine the irrigation systems supplying the alluvial valley floor. Therefore, there will be no subsidence impacts to areas of the Round Bottom alluvial valley floor as a result of mining in the 2 West azea of the Eagle No. 5 Mine. The Division finds that RAG Empire Corporation mill not impact the essential hydrologic functions of the Yampa River/Round Bottom alluvial valley floor, and will not impact the quantity and quality of water supplied to this alluvial valley floor so as to reduce the productivity of the alluvial valley floor. A. The Division has determined that three alluvial valley floors exist within the affected or adjacent area. Therefore, the following findings are in order for the alluvial valley floors known as Williams Fork alluvial valley floor, Yampa River/flig Bottom alluvial valley floor, and Yampa RivedRound Bottom alluvial valley 19oor. Map 25 of the permit depicts the locations of these resources. The Division finds that activities proposed by the applicant will not interrupt, discontinue, or preclude farming on the alluvial valley floors that are irrigated or naturally subirrigated (4.24.3(1)). The proposed activities will not materially damage [he quantity or quality of water in the surface or ground water system described above (4.24.3(3) and 2.06.8(5)(a)Gi))• 38