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<br />r. !\ -". ~" <br />4\.;....- <br /> <br />. <br /> <br />Pro,iect Lands <br /> <br />TIle rema~n~ng 3,830 acres of Class 3 gradient lands have long, <br />even slopes within the six to ten percent range. These lands have <br />medium-textured soils which are moderately deep. Production from <br />these lands is expected to be moderately low and because of the soil <br />erosion hazard they are much better adapted to close-growing crops than <br />to row crops. Required development costs were estimated to be low. <br /> <br />Class 6w Irrigated - Nonirrigable <br /> <br />There are 27,185 acres of class 6w lands in the project service <br />area. Neither these nor the class 6 lands meet the minimum require- <br />ments specified by Bureau of heclamation standards for irrigable <br />lands. However, the class 6w lands have water rights, are presently <br />irrigated, and will continue to receive their historic water supplies <br />but will not receive project supplemental water. <br /> <br />. <br /> <br />Sizable tracts of Class 6w land occur at close intervals from <br />the upper to the lower part of the project area, with most of it <br />being located on the terraces and comprised of lands having soils of <br />very coarse texture or compact clays. On the uplands the soils of <br />the 6w lands are underlain by shale Or sandstone at very shallow <br />depths. Lands with inadequate drainage and high water tables causing <br />saline or saline-alkaline conditions are generally located on the low <br />terraces. <br /> <br />TOPOGRAPHY <br /> <br />The irrigable and irrigated lands of the Narrows Unit occupy a <br />portion of the Colorado Piedmont Plain. The general slope of the plain <br />is to the east and southeast. A broad, shallow valley has been cut <br />into the plain by the South Platte River, creating the types of <br />topography that are associated with flood plains, terraces, and uplands. <br />The lands to be served by the unit extend down the valley, thus the <br />service area is relatively long and narrow. <br /> <br />The uplands, which comprise 42 percent of the service area, are <br />gently undulating to slightly hilly. This condition is the result of <br />many small and a few moderately sized tributaries leading across the <br />uplands into the main valley. The breaks between the uplands and the <br />valley are comprised of short slopes, which range from very steep to <br /> <br />. <br /> <br />57 <br />