HomeMy WebLinkAboutSewer System ReportSewer System Report
for
Castle Rock Subdivision
Phase 6
College Station, Texas
March, 2010
Prepared By:
SCHULTZ ENGINEERING, LLC.
TBPE Firm Registration No. 12327
2730 Longmire, Suite A
College Station, Texas 77845
979.764.3900
o r C O e
*•a ' y * ref
JOSEPH P. SCHULTZ 4
65889 wad
General Information
Location:
General Note:
Land Use:
Design Criteria
Primary Sewer Outfall: An existing 21" sewer line through this subdivision which was
constructed for the Castlegate Subdivision.
Domestic Demand:
Avg. Pop Density:
Average Flow:
Peaking Factor:
Pipe:
Applicable Exhibits:
Conclusion
The Castle Rock Subdivision, Phase 6, Lots 35 -36, Block 1, and Lots 1-
31, Block 2 is located adjacent to the existing Phases 4 and 5.
These 33 residential Tots will flow into the proposed 8" and 6" sewer
lines which are to be constructed with Phase 5. These sewer lines will
connect to an existing manhole on the 21" sewer line.
Single Family Residential
2.67 persons per unit
100 gpd/cap Residential
4
PVC D3034 SDR 26
Exhibit A — Sanitary Sewer System Layout
Exhibit B — Sanitary Sewer Analysis Spreadsheet
The proposed 8" and 6" lines flow into an existing 21" line previously
constructed that was designed for the flow from this development. The
analysis in Exhibit B checks the calculated slope required to pass the
estimated flow against the design slope shown on the plans. The
spreadsheet indicates the design slope is greater than the minimum
computed slope, so we conclude that the system is more than capable of
carrying the anticipated flows from this phase and future phases of the
subdivision.
Exhibit B also shows the full flow velocity in the proposed lines to range
from 2.15 his to 3.13 fps and the calculated peak flow velocity to range
from 0.71fpsto2.10fps.
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129 1 34,443 I ''.......
t 0 801 1 33,642 34,443
t 8 1 0 1 2,136 31,506 '', 33,642
1 6 0 1 1,602 1 29,904 31,506
I 2 0 534 - 1 534
1 6 0 1,602 27,768 29,370
l 10 0 7 2,670 - , 2,670
6 7 0 1,602 1 23,496 1 25,098 i
1 6 0 I 1,602 - 1,602
5 0 1,335 j 20,559 i 21,894 I
1
4 - -a � 0 1,068 19,491
- 73 - I 0 19,491
' $ • , z I Average Daily Infiltration Peaking Peak
3 c o o Flows (ADF) (10% ADF) , Factor Flows
•C u ' R j o a
GPD CFS CFS CFS
0.0533
00 521
0.0487
0.0008
0.0454
0.0041
0.0388 1
0.0025
0.0339
0.0318 1
0.0053 4.00 0.2185
0.0052 4.00 ! 0.2134
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0.0049 4.00 0.1999
0.0001 4.00 '.... 0.0034
0.0045 4.00 j 0.1863
4.00', 0.0169
Z651'0 ': 001 60000 ,
0.0002', 4.00 0.0102
0.0034 4.00 0.1389
0.0032 4.00 '. 0.1304
0.0030 4.00 ; 0.1236
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1 6 I D3034 5.793 j 0.00004
8 , D3034 1 7.754 0.0279
C 6 - D3034 ; 5.793 0.0011
1 D3034 1 7.754 0.0204
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Friction Design Actual Pipe
Size Material Inside ! 1 Slope ' Slope Slope (if ! Slope
Diameter Peak Peak known) Check'
, Flows Flows
D3034 '. 7.754 0.0384
D3034 7.754 0.0366
D3034 7.754 ' 0.0321
D3034 1 5.793 1
D3034 1 7.754 1 0.0155 1
D3034 1 7.754 1 0.0137
D3034 7.754 0.0123
0.40
0.40
1 0.40
0.80
0.40
0.40 ! 0.40 '.. OK 0.328 0.705
0.80 I 0.80 OK ! 0.183 -, 0.458
0.40 0.40 ! OK 1 0.328 ! 0 705
0.40 0.85 j OK 0.328 j 1.026
0.40 1 0.85 OK ' 0.328 1.028
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1 0.40 1 OK 1 0.328 0 70 5 15 0.21851, 1.841
0.40 OK 0.328 0 705 � 2.15 ; 0.2134 j 1.79',
0.40 1 OK 0.328 ! 0 705
I 100 OK 0 183 0 512
0.40 I OK 0.328 0 705
0.80 OK I 0.183 j 0 458
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0.0034i 0.71!
0.1863:; 1.75j
0.01691 1.03'
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