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<br />PAGE 3 OF 3 <br />08/8/00 <br />WATER FEATURES <br />Endnote -- PATER FEATURES--Continued <br />Information on the extent of flooding based on soil data is less specific than that provided by detailed engineering <br />surveys that delineate flood-prone areas at specific flood frequency levels. <br />High water table (seasonal) is the highest level of a saturated zone in the soil in nest years. The depth to a <br />seasonal high water table applies [o undrained soils. The estimates are based mainly on the evidence of a saturated <br />zone, namely grayish colors or mottles in the soil. Indicated in this report are the depth to the seasonal high <br />water table; the kind of water table, that is, "Apparent", "Artesian", or "Perched"; and the months of the year that <br />the water table commonly is high. A water table that is seasonally high for less than 7 month is not indicated in <br />this report. <br />An "Apparent" water table is a thick zone of free water in the soil. It is indicated by the level at which water <br />sands in an uncased borehole after adequate time is allowed for adjustment in the surrounding soil. <br />An "Artesian" water table exists under a hydrostatic beneath an impermeable layer. When the impermeable layer has been <br />penetrated by a cased borehole, the water rises. The final level of the water in the cased borehole is characterized as <br />an artesian water table. <br />A "Perched" water table is water standing above an unsaturated zone. In places an upper, or "Perched", water <br />table is separated from a lower one by a dry zone. Only sa[urat ed zones within a depth of about 6 feet are <br />iniicated. <br />Pooling is starling water in a closed depression. The water is removed only by deep percolation, transpiration, <br />evaporation, or a combination of [hese processes. <br />This report Bives the depth erd duration of pooling and the time of year when pooling is most likely. Depth, duration, <br />arl probable dates of occurrence are estimated. <br />Depth is expressed as the depth of porded water in feet above the soil surface. Duration is expressed as "Very <br />brief" if less than 2 days, "Brief" if 2 to 7 days, "Long" if 7 to 30 days, and "Very long" if more than 30 days. The <br />information is based on the relation of each soil on the landscape to historic pooling and on local information about <br />the extent and levels of pooling. <br />