HomeMy WebLinkAboutTR 35337 HYDROLOGY REPORT-016 Spyglass Ranch Tract 35337
Hydrology Study A
Table 3: Rational Method Summary - Ultimate Condition Variable Areas
D.18 & D.19 6, 7, 8 9.7 20.9 4.11 6.60
L 5 50.0 31.0 18.09 10.55
Sub-Total: 94.46 100.52
Similar Total Areas from Table 1: 200.22 193.32
Totals: 294.68 293.84
Notes:
1. Existing point assumed at Node 407 for purposes of comparison.
2. Developed Q shown for purposes of comparison equals summation of Q at
Nodes 0.305, 0.306, 334.1, 336.1, 346, and 347.1.
It may be observed that there is a slight difference between the total
developed condition drainage area and the total existing condition drainage
area (i.e. 294.76 vs. 293.84 acres). The minor difference is attributed
primarily to the proposed offsite grading slope areas and is accounted for
in Figure 5.
Exist. Drainage------- �`
f0.17ac Dev. Boundary +0.34ac Dev.
+D.71ac Exist. +0.23ac Dev. /?
// +6.150c Exist.
+0.02ac Dev. +0.21ac Exist.
TOTAL Dev. (Ultimate) drainage Area: TOTAL Ex. drainage Area:
294,76ac 293.84ac
I"
t1.38ac +0.26ac +0.97oc Dev
+0.71ac +0.28ac
f0.21ac +1.27ac I
+6.15ac +0.29ac
+5.54ac
303.21 ac +0.17ac
+0.23ac
+0.34ac Exist. Drainage
f 0.97ac Boundary
Developed Drainage Boundary +0.02ac
I
+0.26ac Dev. +1.27 303.21ac
� ac Dev. +5.54ac Dev.
I
77
\ +0.29oc Dev.
+1.38ac Exist.--, \� i
+0.28ac Dev
�J
Figure 5: Ultimate (Ult) Developed vs. Existing Drainage Area Balance
No Scale
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