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baseline Section 2.4, using both aerial photographs and ground surveys. A detailed <br />• view of the irrigated and subirrigated land immediately adjacent to the mined area <br />can be seen on Exhibit 2.4-I in the Vegetation Section. Irrigated lands below the <br />mapping area are shown on Exhibit 2.9-I in Land Use. <br />Mapping of Agricultural Lands <br />Agricultural lands are classified as flood irrigated lands, pasture lands or <br />undeveloped range lands as shown on Exhibit 2.9-I in the Land Use Section. <br />Vegetative productivity of these lands can be determined by correlating Exhibits 2.9- <br />I and 2.4- I . <br />Identification of Subirrigated Lands <br />From the baseline studies and vegetation information, it can be seen that the <br />terraces on the west side of Trout Creek that are outside The permit area are <br />subirrigated, especially along the bluff above the DTI terrace. However, no lands <br />within the affected area of the mine are identified as being subirrigated. <br />u <br />Identification of Flood Irrigatible Lands <br />Within The area to be offected by the Edna Mine there are no additional lands <br />which could be flood irrigated. For West Ridge, Exhibit 4.6-t6, the area to be mined <br />is primarily land that has been mined prior to any law requiring the salvaging and <br />replacement of topsoil. For West Ridge flood irrigation is impractical, even if water <br />could be routed to this area, because the slope exceeds 10%. The Moffat Area is not <br />potentially flood irrigatible because the average slope of the land exceeds 12%. <br />Analysis of Aerial Photographs <br />Color infrared aerial photographs were used in both the soils and vegetation <br />environmental resources descriptions to show the soil and vegetative growth <br />differences over the study area. <br />4.6.2.2 Valley Floor Characteristics <br />• <br />Based upon the environmental resources descriptions of the mine the areas to be <br />disturbed by the Edna Mine for the rest of its life do not include any lands which ore <br />4.6-60 <br />