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Section 785.19 (d) Continued. <br />• <br />which receives ephemeral drainage from a portion of the existing <br />Marr Mine Area. Since all of these areas receive drainage from <br />disturbed areas, the regulations requiring baseline data collection <br />for a material damage determination would apply. The information <br />provided under this Section, along with information provided under <br />Parts 779 and 780 of this application, documents the character- <br />istics supporting the essential hydrologic functions of affected <br />alluvial valley floors in the adjacent area. <br />Based on the information accumulated in the reconnaisance and field <br />investigations and the baseline data collection program, the ef- <br />fects of the proposed mining and reclamation plan on alluvial <br />valley floors downstream from the mine plan area have been evalu- <br />ated. The proposed mining will not directly impact any alluvial <br />valley floor; however, the possible indirect effects of mining on <br />• the essential hydrologic functions of the three subject areas which <br />contain alluvial valley floors are discussed. Supporting data used <br />for the material damage determination is summarized in the discus- <br />sion, and can be reviewed under the following Sections: <br />Geologic data (from 779.14 and 785.19 (c) ). <br />Soils and vegetation data (from 785.19 (c) ). <br />Surface water data (from 779.16 and 785.19 (c) ). <br />Ground water data (from 779.15 and 785.19 (c) ). <br />Operations and reclamation plan (from 780.11 and 780.18). <br />Agricultural land use (from 779.22). <br />In accordance with 30 CFR 785. 19(d), the following discussion is <br />divided into five major sub-headings: Characteristics Supporting <br />Essential Hydrologic Functions; Agricultural Significance; Poten- <br />tial Material Damage; Effectiveness of Reclamation; and Environ- <br />mental Monitoring. <br />785-33 <br />