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PROJ00462
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PROJ00462
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Last modified
11/19/2009 11:43:26 AM
Creation date
10/5/2006 11:56:20 PM
Metadata
Fields
Template:
Loan Projects
Contract/PO #
FS0036X
Contractor Name
Idaho Springs, City of
Contract Type
Loan
Water District
0
County
Clear Creek
Loan Projects - Doc Type
Feasibility Study
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<br />(8) <br /> <br />Time of Concentration T = 0.51 hr, <br />c <br />from Step (A. )(4). <br />From Table 5, Page 67: CN = 88 so <br />no adjustment in T necessary. <br />c <br /> <br />( <br /> <br />Compute T , T band <J... for 1. OO-inch, <br />I-hour hyd~ograph, lb-llng watershed T <br />c <br /> <br />T = D + 0.6 T <br />P 2 c <br /> <br />Given: <br /> <br />T=O.Slhr <br />c <br /> <br />A = 5.01 sq. miIes <br /> <br />Tb = 2.67 Tp <br /> <br />Q = 1.00 inch <br /> <br />q = 484 AQ <br />P T <br />P <br /> <br />For 0 = 1 hr <br /> <br />T = 1 + 0.6 (0.51) = 0.81 hr <br />p 2 <br /> <br />Tb = 2.67 (0.81) = 2.15 hr <br /> <br />q = 484 (5.01) (1.00) = 2994 sec. -ft. <br />p 0.81 <br /> <br />For D = 2 hrs. <br /> <br />T = 2 + 0.6 (0.51) = 1.31 hrs. <br />p 2 <br /> <br />T b = 2.67 (1.31) = 3.49 hr <br />q = 484 (5.01) (1.00) = 1851 sec. -ft. <br />p <br />1.31 <br /> <br />- 23 - <br />
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