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<br />ENVIRONMENTAL ASSESSMENT <br />INTROOUCTION <br /> <br /> <br />The purpose of this assessment is to address broad impacts on poten- <br />tial water transfer facilities along a canal corridor approximately <br />50 miles in width beginning at Oes Arc in Prairie County, Arkansas, with <br />terminal storage at Blanco Canyon near Floydada, Floyd County, Texas. <br />Impacts of four holding reservoirs in Arkansas for source water are con- <br />sidered in this assessment. A Sabine/Sulphur River tie-in transfer <br />canal and source reservoirs on the Sabine River (Carthage) and Sulphur <br />River (Naples) are also included. Table 13 gives a summary of major <br />features considered in this alternative and pertinent data. The study <br />corridor is shown on Figure 7 with the general alignments for Plan I and <br />Plan II shown on Figures 8 and 9 respectively. <br /> <br />This assessment is reconnaissance level in scope and concentrates <br />on potential significant environmental impacts associated with <br />construction of canals, pumping plants, storage reservoirs, and other <br />transfer facilities, and the effects of operation of these facilities. <br />This assessment does not consider impacts of interbasin transfer of the <br />specific quantities or quality of water involved, nor secondary or <br />indirect impacts of movement of water from water surplus areas to arid <br />areas or energy requirements and facilities. The assessment is based <br />primarily on known information found in published sources and available <br />files and does not attempt to quantify specific environmental impacts. <br />Analyses are representative of the potential impacts likely on <br />resources recognized as significant and the general degree of magnitude <br />of the transfer facilities on other environmental and cultural <br />attributes. <br />WATER TRANSFER FACILITIES. This assessment is based on the assumption <br />that the canal under consideration would be a trapezoidal, open, <br />concrete-lined channel a maximum of about 230 feet wide, on a <br />right-of-way approximately 500 feet wide. It is recognized that no <br />specific alignment is designated, but a corridor ranging in width from <br /> <br />028 <br />