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Last modified
11/23/2009 1:21:24 PM
Creation date
10/4/2006 9:32:06 PM
Metadata
Fields
Template:
Floodplain Documents
Designation Number
31
County
Arapahoe
Community
Unincorporated Arapahoe County
Title
Major Drainageway Planning - Little Dry Creek, Report, Volume I
Date
2/1/1974
Designation Date
6/1/1974
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br /> Ranking Basis <br /> Present Worth Benefit- Present Worth <br /> Estimated of Total Cost of Net <br /> Cost Benefits Ra tio Benefits <br />Plan B $7,125,000 $ 36,713,600 4.77 $ 29,588,600 <br />Plan E 7,164,000 36,713,700 4.75 29,549,700 <br />Plan A 7,547,000 35,917,000 4.58 28,370,000 <br />Plan C 3,827,000 30,463,400 7.11 26,636,400 <br />Plan D 1,000,000 16,796,700 14.69 15,796,700 <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />The District and local government representatives reviewed the Phase A study <br /> <br /> <br />in detail and selected Plan E as the optimum flood plain management plan for <br /> <br /> <br />the Little Dry Creek basin. It will be seen that Plan E and Plan B are the <br /> <br /> <br />two plans that yield the greatest flood protection net benefits to the area. <br /> <br /> <br />It is consistent with good public works practice to select the plan yield- <br /> <br /> <br />ing the greatest net benefits as such a plan will give widespread flood pro- <br /> <br /> <br />tection. The benefit to cost ratios of parts of a widespread plan will be <br /> <br /> <br />greater than such ratios for other parts; but no individual improvement is <br /> <br /> <br />included in the widespread plan if the benefits to be derived from it are <br /> <br /> <br />less than its cost. <br /> <br />I <br />I <br /> <br />I <br /> <br />Report <br /> <br /> <br />This report is presented in two volumes: Volume I - Report, and Volume II <br /> <br /> <br />Drawings. Volume I contains the text, tables, and charts. Volume II con- <br /> <br /> <br />tains drawings of the Little Dry Creek drainageways. The 100-year flood <br /> <br /> <br />plain limit is shown on the drawings for existing conditions, and for condi- <br /> <br /> <br />tions after the improvements recommended in this report are constructed. <br /> <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br /> <br />-7- <br />
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