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<br />1-9 <br /> <br />The spillway problem with MGR is, in the engineer's opinion, a unique <br />flood hazard to those downstream for the large and infrequent runoff <br />event. A special effort should be made by emergency service personnel <br />to develop a well organized and quickly implementable early warning <br />and evacuation plan downstream of ~GR. <br /> <br />PLANNING VARIATIONS <br /> <br />This Lena Gulch report introduces several aspects of urban drairldge <br />and flood control planning which heretofore have essentially been <br />neglected. Util ization of the non-structural method has been selected <br />as the basis for one of the three alternatives presented. While the <br />non-structural solutions are the least costly in terms of capital in- <br />vestment, the political and institutional decisions are the mosi: <br />difficult. These decisions, however1 \'Ilill be easier to make as the <br />federal government flood insurance program is imple~ented~ <br /> <br />The Water Pollution Control Act Amendments of 1972, known as PL 92-500, <br />speak to an entirely new concept of water quality managemen~ in the <br />public waterways by 1985. Therefore, District planning now should <br />look forward to the impos i tion of water qual i ty management controls <br />in the future relative to storm runoff and s:lowmelt runoff" This <br />report relates to these needs. <br /> <br />One of the fi rst successful appl ications of the Massachusetts In5ti~ut" <br />of Technology Catchment Model (MITC,~T) is represented in th"s repor~ <br />for Lena Gulch. The Catchment Model is explained in enough detai'l :n <br />the body of this report so that the reader Cdn understand the goals and <br />objectives of the model. It is hoped that the many opportunities which <br />are available through the use of this and other nodels by the ergineer- <br />ing and planning professio",; will be ,'ecognized. <br />