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<br />. confined, narrow, and steep gradient streams found <br />in the mountain regions of the state. The criteria <br />relate to potential damages produced by static and <br />dynamic flood forces caused by depth and velocity. <br />The hazard area concept does not work well in wide <br />floodplains where development pressure is great. It <br />is, however, often applicable in wide areas with <br />shallow flooding and low velocities. <br /> <br />-33- <br /> <br /> <br />2} Master Drainageway Planning Studies <br /> <br />Community officials may wish to quantify their flood and <br />drainage problems and seek permanent solut ions. In a <br />. "Master Drainageway Plan" or a "Feasibility Study," an <br />analysis is performed which evaluates structural and <br />non-structural improvement plans to mitigate or allevi- <br />ate flood hazard problems and resultant damages. These <br />studies can be performed simultaneously with a "Detailed <br />Floodplain Information Study," or they can be indepen- <br />dent studies. In many cases the studies will include <br />designs and plan layouts. This type of work program <br />will include the same tasks as required for a "Detailed <br />Floodplain Information Study" with some additions. <br /> <br />a) Base Mapping and Surveys <br /> <br />... Requirements as stated in 1, a; however, ground <br />elevations should be established for all street <br />