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PERMFILE47474
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PERMFILE47474
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Entry Properties
Last modified
8/24/2016 10:49:29 PM
Creation date
11/20/2007 1:10:35 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Permit File
Doc Date
6/2/2006
Section_Exhibit Name
Exhibit 74 Monument Dam -Minnesota Reservoir Structure Inventory
Media Type
D
Archive
No
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TABLE 2 <br />TIME OF CONCENTRATION DETERMINATION <br />Non-uniform gradient <br />A. First increment, cliff area <br />L = 0.76 mi <br />~. <br />H = 7966-7326 = 640 ft. <br />Tc = [11.9 L3/H]0 385 <br />Tc = [11.9 (0.76)3/640]0.385 <br />Tc = .157 hour <br />B. Second increment, severe slopes <br />L = 0.67 miles <br />H = 230 ft. <br />Tc = [11.9- (.67)3/320]0.385 <br />Tc = 0.201 hours <br />C. Third increment, foothills <br />L = 3.6 miles <br />H = 8220-7326 = 894 <br />Tc = [11.9 (3.6)3/894]'385 <br />Tc = .832 hours <br />D. Total concentration time = 1.19 hours <br />71.4 min. <br />• <br />• <br /> <br />VI-18 <br />
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