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. . . Hydraulic Analysis of Construction Conditions 9 ( > Plan View n 40100 tJ Typical Cross Section gra&lI ~fiUmaterial --:ro,,:~,,:~,,:~,,:;,,:~)i.~;,,:;.,,:,;.,,:~~ ~~~~~.~.~.~.~.~.,.~.~.,.,{~{,{~ 1--50~471~50--I t ____ (! ________ 10 I_ 571 --j T Front Elevation r:r-4Oi~ Side Elevation Figure 7. Spectator Area Design dations in "Open Channel Hydraulics" by Ven Te Chow (page 185). Because the soil is a mixture of clay loam and fine gravel, this is considered a fairly erosion resistant soil, so by planting buffalo grass or bluegrass on the spectator area, there will be no erosion at flood water velocities less than five feet per second. Based on the data in table 2, the proposed flow velocity at cross section #139690 will be only 3.4 feet per second. The maintenance of the grass is important to consider. All grass surrounding the lake areas, including the spectator area will be maintained with regular mowings to a length not to exceed four inches. In addition, we own an adjudicated well which will be the source of all landscape irrigation water to be used in our underground sprinkler system. Hydraulic Analysis of Construction Conditions During the construction phase of our project, temporary stockpiles will be located in the flood plain. This section will address these stockpiles, and the methods being used to minimize their effect will be discussed. Two main issues will be addressed in this section. The first is that any development within the adopted flood way meet the minimum FEMA criteria of no rise in the levels of a base flood discharge. The second issue of importance is that any development done in an area where there is no adopted flood way is subject to the FEMA regulation that states this development, when considered with all proposed development must not create an increase in the level of a base flood discharge by more than one foot.