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<br />0:1833 <br /> <br />. <br /> <br />FLOOD COIITROL BY STORAGE <br /> <br />. <br /> <br />Griffin Plan <br /> <br />The report by J. H. Griffin, previously mentione&, pro- <br /> <br />posed five small reservoirs throughout the valley above the Sopris <br />site including Long's Canyon reservoir to be fed by a 1500 second- <br />foot inlet canal from Purgatoire River. The objective of such a <br /> <br />development was flood control and irrigation regulation. With <br /> <br />small reservoir capacities, from l400 to 4700 acre-feet, on d~ain- <br /> <br />age areas from 30 to 134 S~lare miles, little flood control oould <br /> <br /> <br />be expected as evidenced by the 1925 flood when Burro Canyon dis- <br /> <br /> <br />charged an estimated 24,000 second-feet from a drainage area of <br /> <br /> <br />29 square miles as determined by J. H. Bailey, .then Chief <br />Hydrographer for the State of Colorado. Although the volume of <br />Burro Canyon runoff is unknown, some inference as to what it may <br />have been is derived from the quantity passing Trinidad which is <br />estimated at ll,300 acre-feet by the writer. The total area con- <br />tributing was 90 square miles. In Griffin's plan, which proposes <br />control of only 320 square milee of the 742 square miles of drain- <br /> <br />age area above Trinidad, the Long's Canyon reservOir, of 4700 acre- <br /> <br />feet capacity, is below a drainage area of 134 square miles. This <br /> <br />reservoir, primarily for irrigation, was filed upon by the Model <br /> <br />Company for increasing storable flow by exchange of water with <br /> <br />direct flow rights. A better plan to accomplish the same result <br /> <br />appears to be enlargement of the Model canal in its present <br /> <br />location with an adequate diversion dam. The Long's Canyon reservoir <br /> <br />. <br /> <br />.5l <br /> <br />