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• ground eater conditions in one location with other areas in similar <br />stream valleys can be made by comparing lithology, soils, vegetation <br />and any outside influences such as impoundments or diversions. The <br />quality of alluvial ground eater is also central to its suitability <br />for sub-irrigation. <br />Stream Channel Ground Water Hydrology <br />In order to evaluate the possibility of sub-irrigation from <br />ground eater in the proposed permit and adjacent area, 10 shallow <br />alluvial wells vere installed in the drainages of Foidel, Middle and <br />Fish Creeks to form tranaecta crossing the valleys, as show on Map <br />4, Mine No. 3 Hydrology. The yells vere installed in backhoe pits <br /> to facilitate detailed logging of topsoil, root zone and alluvial <br />• <br /> materials, and were constructed with perforated PVC casing to enable <br />eater monitoring and sampling. The lithologic logs of the alluvial <br />wells are presented in Exhibit 1, Drill Hole Logs. Topsoil and root <br />zone depth, alluvial lithology and eater levels from these yells <br />vere used in constructing Map 17, Nine No. 3 Stream Channel Cross- <br />Sections. Observations vere made during the digging of the backhoe <br />pits including depth of soil, depth of root zone, type of alluvial <br />material and water inflow to the pit. Soil mottling or other <br />evidence of periodic ground water fluctuations into the root zone <br />was recorded. <br />With the exception of a few isolated sand and gravel deposits, <br />• the upper portion of the channel fill in the intermittent drainages <br />vas found to be predominantly tight, sticky clay. The clayey layers <br />2.06-20 <br />