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3. There are several examples of soil types shown on Map-04 not coinciding with <br />soil types used in the curve number determinations in Volume IV for the various <br />drainage areas. Most of the differences do not have an effect on the curve number <br />determination but, in order to avoid any future confusion, the Division believes <br />appropriate changes should be made. <br />A. In the Sedcad design for pond A, on pages A-3, A-4 and A-5, soil types of <br />loam, Persayo Sandy Loam and Avalon Sandy Loam are used. However, <br />examination of Map-04, "Soils", shows that there are only rock outcrops <br />in the area draining to pond A. Please explain the use of these soil types in <br />the hydrology designs or make appropriate changes to the Sedcad designs. <br />B. Concerning pond G, on page G-3 of Volume III, a soil type of Persayo <br />Sandy Loam is used for the salt desert shrub curve number determination. <br />However, referring to Map-04, Soils, there does not appear to be any such <br />soil type in the drainage area for pond G. Please explain the use of this soil <br />type in the hydrology design for the pond G drainage or make appropriate <br />changes to the Sedcad designs. <br />C. In the hydrology designs for pond G on pages G-3 and G-4, there are no <br />soil types of torriorthents, Chipeta Silty Clay or rock outcrop used for any <br />of the curve number determinations, even though those soil types appear <br />in the pond G drainage on Map-04. Please explain. <br />D. In the hydrology designs for pond C on pages C-3, C-4 and C-5, the soil <br />types used in the curve number determinations do not appear to match the <br />soil types shown on Map-04 for the pond C drainage area. In one case, the <br />soil type is listed as being Persayo Sandy Loam but there does not appear <br />to be any such soil type shown on Map-04 for the pond C drainage area. <br />Also, soil types of Chipeta Silty Clay, Chipeta Clay, torriorthents and Aga <br />Very Gravelly Loam appear on Map-04 within the pond C drainage but do <br />not appear in any of the curve number determinations for pond C. Please <br />explain. <br />E. On page H-3 of the hydrology design for pond H, the curve number <br />determination for the salt desert shrub resulted in a number of 86. <br />However, as shown on page H-4, a curve number of 88 for salt desert <br />shrub was used in the pond H runoff determination. Please rectify. <br />F. On page H-3 of the curve number determination for pond H, a soil type of <br />Persayo Sandy Loam is used for the salt desert shrub community. <br />Referring to Map-04, however, there does not appear to be any such soil <br />type in the drainage area for pond H. Map-04 does show that Chipeta Clay <br />is in the pond H drainage area, but this soil type is not used in any of the <br />curve number determinations. Please explain. <br />2