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VI. SPECIAL CATEGORIFSS OF NIIf7ItIG <br />6.1 MINING OF ALLUVIAL VALLEY FIL)OELS (2.06.8) <br />~ by w~-o - ~~~ ? <br />An investigation was carried out during the fall of 1980 to deternune <br />if the Trinidad Basin Mine was located in or adjacent to an alluvial valley <br />floor. The investigation centered around mapping of alluvial deposits, soil <br />capability, land use, and vegetation analysis. However, no quantitative <br />neasurements of vegetative cover or production wire obtained. Sr <br />c~ <br />The alluvial deposits are exhibited on Maps IV-3 and IV-5. As ~ <br />4 <br />S <br />stated in the Hydrology Section, the origin of some of the material r <br />identified as QAL is questionable due to the m; n;nq history. The general <br />and detailed hydrologic maps show the drainage basin airl patterns. The <br />ground water in Del Agua Canyon flows down the channel and is forced to <br />the surface in areas where the sandstone outcrop or subcrop in the channel. <br />There are no ]mown areas that were flood irrigated within the <br />permit boundary or the adjacent area. This is based on discussions with <br />the local SCS representative. In addition, a review of a tApographic map <br />of the site and a field inspection will indicate that sufficient un- <br />disturbed area does not exist within the permit boundary to support <br />agricultural activity based on irrigation. Ftu ther down ~ ~n~~farnier <br />has diverted the flow from Del Aqua Canyon and has been irrigating a' <br />field since 1963. Hocever, the field is only five acres and success <br />is 1 teduni~based upon quantities of moisture received during winter. <br />No production recrords care available at the time to try to determine <br />airount of production due to irrigation. <br /> <br />