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This layer contains the pressure zones for the water system in the City of Round Rock, located in Williamson County, Texas. This layer is part of an original dataset provided and maintained by the City of Round Rock GIS/IT Department. The data in this layer are represented as polygons.<\/SPAN><\/P> <\/P> A pressure zone is defined as the area bounded by both a lower and upper elevation, all of which received water from a given hydraulic grade line (HGL) or pressure from a set water surface. The HGL is usually provided by one or more storage tanks located at the same elevations so they share high and low water surfaces.<\/SPAN><\/P> <\/P> There are currently 11 pressure zones in this layer. <\/SPAN><\/P> <\/P><\/DIV><\/DIV><\/DIV>",
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