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<br />Of lesser significance, but warranting consideration in <br />detailed design of intake and pumping facilities, is the encroachment <br />and death of less motile aquatic organisms from source points and <br />pumping plants at holding reservoirs. The large volumes of water pumped <br />could result in changes in community structure if large numbers of fish <br />or benthic larvae were killed in these facilities. <br /> <br />(4) Cultural. Construction of the canal will require <br />modifications of pipeline, communication or transportation facilities, <br />and the possible relocation of people and farm structures where un- <br />avoidable. These relocations will result in temporary local inconven- . <br />social impacts due to disruption of facilities but will not result in- <br />convenience and permanent impacts except where small local roads are not <br />replaced. Severance of ownerships will result in access problems to <br />individual owners of property if adequate access by bridge facilities is <br />not provided. Loss of farmland and severance impacts may also result in <br />economic losses, though the landowners should be adequately compensated <br />for these losses in land purchase. <br /> <br />Specific impacts on archeological and historical resources <br />cannot be identified until a more definitive alignment is selected and <br />surveyed. It is presumed that a route survey would locate and identify <br />the significance of currently unidentified archeological and historical <br />features. Flexibil ityin the route al ignment would allow avoidance of <br />most, if not all, significant sites or features~ Remaining significant <br />archeological or historical features adversely impacted would .require <br />mitigation planning to reduce impacts. <br /> <br /> <br />canal. Many species of plankton (algae, fungi and free floating <br />protozoans, zooplankters, and larvae of crustacea and insects), nekton <br />(free swimming fish and invertebrates), and benthos (bottom dwelling <br />mussels, insect larvae, worms, and other inverebrates and plants) would <br />be transported to regions where they do not presently occur, and would <br />become established as a new part of the aquatic ecosystem. Such <br />unintentional introductions could have profound effects on local endemic <br />species, and on overall aquatic ecosystems, diversity, population <br />dynamics, and distribution of species throughout the Arkansas-Texas <br />region. <br /> <br />D48 <br />