HomeMy WebLinkAboutTR 35337 HYDROLOGY REPORT-015 Spyglass Ranch Tract 35337
Hydrology Study
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. 313.91 vs. 307.65 acres). The minor difference is attributed
primarily to the proposed offsite grading slope areas and is accounted for
in Figure 4.
TOTAL Dev. (Stage 7) drainage Area: TOTAL Ex. drainage Area:
373.970c 307.65ac
+1.38aC +0.26ac
+0.28ac
315.29ac +1.27ac
+0.29ac
+5.54aC Exist. & Dev. (s9)
Drofnoge Boundary
315.29ac
I
Exist. Drainage
Developed Drainage Boundary Boundary
difference I
I
+0.26ac Dev.
� +1.27ac Dev, +5.54ac Dev.
I
+0.29oc Dev.
+1.38ac Exist. \�\ / +0.28ac Dev.
Figure 4: Stage 1 (S1) Developed vs. Existing Drainage Area Balance
No Scale
Table 3 identifies only those drainage areas that are different in the
Ultimate condition. All other drainage areas remain the same from the
Stage 1 to Ultimate condition scenarios.
Table 3: Rational Method Summary - Ultimate Condition Variable Areas
Developed Dev Ex.
Condition Area Equiv. Existing Developed Existing Total Total
(Ultimate) Condition Area Q(100yr) Q(100yr) Area Area
(Ac) (ac)
C 1 41 1 133.521 155.0 1 44.67 1 53.56
D 19 1 69.7 86.1 27.59 29.81
R: \265324\Final\llydrology\Report\324 Report Body.doex