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<br />SELECTED ALTERNATIVE <br />ENVIRONMENTAL QUALITY ACCOUNT (CONTINUED) <br />Sedgwick-Sand Draws Watershed <br />Colorado <br />Nebraska <br />Components Measures of Effects <br /> <br />3. Disturbance of 361 acres during <br />installation of structural measures <br />may destroy the value of some unknown <br />archeological sites and may lead to <br />discovery of some unknown archeolog- <br />ical sites. <br /> <br />4e The installation of project measures <br />will change the visual landscape of <br />. the area. <br /> <br />5. 272 acres above the dams will be <br />covered with sediment at the end of <br />100 years. Any archeological sites <br />within this area will become more <br />difficult to excavate as time passes. <br /> <br />6. 502 acres, presently rangeland, above <br />.. _ the. 9.all1~ .",in _be. ~!11?:J.~q.t .t:'? _p"e.F.iorii.c.. <br />- flooding for periods of time up to <br />10 days. <br /> <br />. 7. 33 acres.of cropland will be con- <br />verted to floodways. <br /> <br />8. An average of 205 acres of lower- <br />lying floodplain will not be covered <br />with sediment each year. <br /> <br />E. Irreversible or irretriev- <br />able commitment <br /> <br />1. Land, labor and capi tal required for <br />the application of the following land <br />treatment measures represent an irre- <br />trievable commitment of resources .as <br />long as the measures are in effect: <br /> <br />Part 2-9 <br />Deeeml>e.r 1975 <br />