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<br />WORKSHEET 3: Time of Concentration (Ie) or Trav~l Time (It)
<br />
<br />. Projec1: Conage Villas Calculated By: CNC
<br />Project No, 92-111 Date: 10-22-92
<br />Location: Arden Hills Checked By:
<br />File: TR-55.WRl Date:
<br />
<br />Drainage Basin:
<br />Predevelopment Condition
<br />Check One: X_To _Tt
<br />
<br />
<br />Sheet Row
<br />Seqment #1 Seqment #2 I Subtotal I
<br />1, Surface DescriDtion (table 3-1) Weeds I NA i}}}::}}:;::q
<br />2, Manninq's Rouqh Coeff.,n (table 3-1) 0,100 NA :;>>>>>}~::1
<br />3, Flow Len-qth, L {total <- 300 ft}, ft 300 NA :::::::::::::::;:::::::::::::1
<br />. :} - ? .............................
<br />4, Two-year 24-hour Rainfall, P:..., In, _.7 2.7 }}}}~{<{
<br />5. Land Slope, s, tt/ft 0,033 NA .:::::::::::::::::::::::::::::1
<br />6, Tt=O,007(nL)AO,B/(p2)AO.5(s)AO,4, hr 0,25 NA I 0,25 I
<br />
<br />
<br />Shallow Concentrated Row
<br />. Seqment #1 I Seqment #2 Subtotal!
<br />7, Surface DescriDtion (paved/unpaved) NA i NA ::;:::::::::::;::::::::::::::1
<br />8 FI L h L ft NA I A f""",.,"',..'..,"""""l
<br />. ow en~ t , . N ~::::::::::::::::::::::~::::::~
<br />9, Watercourse SlaDe, s, ftfft NA NA 1:::::::::::::::::::::::::::::1
<br />10, Averaqe Velocitv, V (fiq,3-1), tt/s NA NA t}}}}}>>j
<br />11. Tt _ U3600 V, hr, NA NA I NA I
<br />
<br />
<br />Channel Row
<br />
<br />! Seqment #1 i Seqment #2 Subtotal i
<br />12. Cross Section Flow Area, a, (ft)"2 I NA I NA :;::;;:;:;:::;::::::::=:::::l
<br />13 Wetted P",imeter Pw ft I NA I NA >:::::::::::::::::::::::::::::1
<br />. 7 I '"......,'.............-...-..,1
<br />14 -''''d I' . aIPw t I -,,',-,'-.,',',',',',','-.,','
<br />, Hr' rau Ie RadiUS, r = , t ,NA I NA [:::::::::::::::::::::::::::::1
<br />15 Channel Slope s ft/ft i NA . NA f.:;:::;:::;:::;:::::::::::::::1
<br />. . I r' i l:::::::::::::::::::::::::;:::t
<br />16, Mannlnq's Rouahness Coeff" n . NA ! NA f:::::::::::::::::::::::::::::1
<br />117, V = 1 ,49(rYO.67(sYO,5/n, ftis I NA i NA 1))))))):::1
<br />18, Flm',; Length, L ft : NA I NA k::::::::::::::::::;::::::::1
<br />P9,Tt=U3600V,hr. I NAi NAI NA!
<br />
<br />
<br />Total
<br />20, Watersh<!d or Sub-ar<!a Tc or TL_ Total I 0,25 ,
<br />.
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<br />TR-55
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<br />4
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