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<br />Table 14 lists counties in Arkansas and Texas which would contain <br />transfer canals and storage facilities. The primary limits of the <br />study area for direct impacts is the county level. Where noted, water <br />storage and transfer facilities affect resources outside the primary <br />study area. <br />AFFECTEO ENVIRONMENT <br /> <br /> <br />1 mile to as much as 50 miles would be under consideration if the <br />transfer alternative were carried into a more detailed feasibility <br />study. Pumping stations, siphons, pipelines, and other facilities for <br />water conveyance are included within the corridor. <br /> <br />Storage reservoirs for holding surplus water pumped from source <br />streams in Arkansas and Texas and maximum acreage potentially affected <br />are listed in Table 13. These reservoirs would be utilized to store <br />water for pumping to the terminal storage facility at Blanco Canyon in <br />a system operation. <br /> <br />Physical. The corridor under consideration encompasses an <br />elevation differential of less than 100 feet mean sea level near <br />Des Arc, Arkansas, to 3,000 feet mean sea level at Blance Canyon, Texas <br />The route traverses the Coastal Plain, Central Lowlands, and Great <br />Plains Physical provinces. This corridor is shown on Figure 7. Topo- <br />graphy is varied, ranging from the almost level Blacklands and High <br />Plains to gently rolling topography in the Rolling Plains, Cross <br />Timbers, and Eastern Woodlands. The only major geological surface <br />features near the route are the Caprock escarpment near Lubbock, Texas, <br />and the playa lakes on the High Plains. <br /> <br />Average annual rainfall varies from more than 50 inches in some <br />parts of Arkansas to less than 16 inches near the western terminal point <br />of the water transfer route. Major watersheds affected by the transfer <br />route under consideration include the White, Arkansas Ouachita-Saline, <br />and Red Rivers in Arkansas, and the Sulphur, Sabine, and Cypress Rivers <br />of Texas. The canal route in Texas generally follows the upland <br />watershed divide between the Red and Sulphur River watersheds, the Red <br />and Trinity River watersheds, and the Red and Brazos River watersheds. <br />Table 15 lists major and minor streams affected by Alternative O. <br /> <br />D30 <br />