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. . . 2G i. ~; Project Lands The 22,465 acres of intermittently irrigated, but irrigable, lands are nnder existing ditch systems and have been irrigated when water was available. They have been treated as nonirrigated land in economic and other analyses. They would receive a consistent water supply from the Narrows Unit but are not considered to be totally "new" previously nonirrigated lands. The 27,185 acres of class 6w lands are presently irrigated but do not meet the minimum requirements specified by Bureau of Reclamation standards for irrigable lands. They will continue to receive their historic water supply nnder existing rights but will not participate in the supplemental supplies provided by the nnit. Class 6 lands are not presently irrigated and do not meet the minimum requirements for irrigability. DESCRIPrION OF LAND CLASSES Class 1 Thirty-nine percent, or 64,155 acres of the net irrigable area is :lass 1. The potential productivity of these lands is uniformly high, and the development costs are low, the maximum being $30 per acre. The distinguishing characteristics of the c:lass 1 lands are their deep medium-textured soils and their nearly level topography. Within this class there are variations in soil texture, the most common type consisting of clay loam in the top horizon with sandy loam in the subsoil and substrata. Variations from this usual type include silt loams and sandy loams in the topsoil and clay loams and silt loams in the subsoils and substrata. The class 1 lands generally slope slightly less than one percent and are smooth to slightly nndula ting. No drainage problems are evident and the soils are free of harmful accumulations of soluble salts and alkali. Class 2 Limitations of potential productivity nnder average management or somewhat higher development costs resulted in 67,395 acres, or 54